Add image to taxonomy
### Step 1: Register Custom Taxonomy with an Image Field
If you haven't already, you need to register your custom taxonomy. In the `functions.php` file of your theme or plugin, register the taxonomy as usual. Afterward, you'll add a custom field for the image upload.
// Register a custom taxonomy
function create_custom_taxonomy() {
$args = array(
'labels' => array(
'name' => 'Custom Taxonomy',
'singular_name' => 'Custom Taxonomy',
),
'hierarchical' => true,
'show_ui' => true,
'show_admin_column' => true,
'query_var' => true,
);
register_taxonomy('custom_taxonomy', 'post', $args); // Replace 'post' with your custom post type if needed
}
add_action('init', 'create_custom_taxonomy');### Step 2: Add Image Field to Taxonomy Edit Page
Use `add_action()` to create a field on the taxonomy term editing screen. You can use the `term_meta` functionality to store the image.
// Add image field to taxonomy term edit form
function add_custom_taxonomy_image_field($term) {
// Retrieve the image URL or ID if it exists
$image_id = get_term_meta($term->term_id, 'custom_taxonomy_image', true);
$image_url = $image_id ? wp_get_attachment_url($image_id) : '';
?>
<tr class="form-field term-group">
<th scope="row">
<label for="custom_taxonomy_image"><?php _e('Image', 'textdomain'); ?></label>
</th>
<td>
<input type="hidden" id="custom_taxonomy_image" name="custom_taxonomy_image" value="<?php echo esc_attr($image_id); ?>" />
<div id="custom_taxonomy_image_preview">
<?php if ($image_url): ?>
<img src="<?php echo esc_url($image_url); ?>" style="max-width: 200px;">
<?php endif; ?>
</div>
<button class="button" id="upload_image_button"><?php _e('Upload Image', 'textdomain'); ?></button>
</td>
</tr>
<?php
}
add_action('custom_taxonomy_edit_form_fields', 'add_custom_taxonomy_image_field');### Step 3: Save the Image ID
Add functionality to save the image when the term is updated or created.
// Save the image ID when saving the taxonomy term
function save_custom_taxonomy_image($term_id) {
if (isset($_POST['custom_taxonomy_image'])) {
$image_id = sanitize_text_field($_POST['custom_taxonomy_image']);
update_term_meta($term_id, 'custom_taxonomy_image', $image_id);
}
}
add_action('edited_custom_taxonomy', 'save_custom_taxonomy_image');
add_action('create_custom_taxonomy', 'save_custom_taxonomy_image');### Step 4: Enqueue Media Uploader Scripts
For the image upload to work, you'll need to enqueue WordPress's media uploader scripts.
// Enqueue the media uploader script
function enqueue_custom_taxonomy_image_scripts($hook) {
// Only enqueue on the taxonomy edit screen
if ('edit-tags.php' !== $hook) {
return;
}
// Ensure we're on the correct taxonomy page
if ('custom_taxonomy' !== $_GET['taxonomy']) {
return;
}
wp_enqueue_media(); // Enqueue the media uploader
?>
<script type="text/javascript">
jQuery(document).ready(function($) {
// Open media uploader when the button is clicked
$('#upload_image_button').click(function(e) {
e.preventDefault();
var media_uploader = wp.media({
title: '<?php _e('Choose an Image', 'textdomain'); ?>',
button: {
text: '<?php _e('Use this Image', 'textdomain'); ?>'
},
multiple: false
})
.on('select', function() {
var attachment = media_uploader.state().get('selection').first().toJSON();
$('#custom_taxonomy_image').val(attachment.id);
$('#custom_taxonomy_image_preview').html('<img src="' + attachment.url + '" style="max-width: 200px;">');
})
.open();
});
});
</script>
<?php
}
add_action('admin_enqueue_scripts', 'enqueue_custom_taxonomy_image_scripts');### Explanation:
– **Step 1**: Registers the custom taxonomy.
– **Step 2**: Adds a custom field for the image in the taxonomy term edit form.
– **Step 3**: Saves the image ID to the taxonomy term meta.
– **Step 4**: Enqueues the media uploader scripts and handles the button click to allow the user to upload an image.
This will allow you to upload and display images for your custom taxonomy terms directly from the WordPress admin.
### Step 1: Register the Custom Taxonomy (`department`)
This will register the `department` taxonomy for your custom post type, or posts if you're using default ones.
// Register a custom taxonomy 'department'
function create_department_taxonomy() {
$args = array(
'labels' => array(
'name' => 'Departments',
'singular_name' => 'Department',
),
'hierarchical' => true,
'show_ui' => true,
'show_admin_column' => true,
'query_var' => true,
);
register_taxonomy('department', 'post', $args); // Replace 'post' with your custom post type if needed
}
add_action('init', 'create_department_taxonomy');### Step 2: Add the Image Upload Field for the `department` Taxonomy
Use the following code to add an image upload field to the `department` taxonomy term edit page.
// Add image field to department taxonomy term edit form
function add_department_taxonomy_image_field($term) {
// Retrieve the image URL or ID if it exists
$image_id = get_term_meta($term->term_id, 'department_image', true);
$image_url = $image_id ? wp_get_attachment_url($image_id) : '';
?>
<tr class="form-field term-group">
<th scope="row">
<label for="department_image"><?php _e('Image', 'textdomain'); ?></label>
</th>
<td>
<input type="hidden" id="department_image" name="department_image" value="<?php echo esc_attr($image_id); ?>" />
<div id="department_image_preview">
<?php if ($image_url): ?>
<img src="<?php echo esc_url($image_url); ?>" style="max-width: 200px;">
<?php endif; ?>
</div>
<button class="button" id="upload_image_button"><?php _e('Upload Image', 'textdomain'); ?></button>
</td>
</tr>
<?php
}
add_action('department_edit_form_fields', 'add_department_taxonomy_image_field');### Step 3: Save the Image ID for the `department` Taxonomy
Use this code to save the image when the term is updated or created.
// Save the image ID when saving the department taxonomy term
function save_department_taxonomy_image($term_id) {
if (isset($_POST['department_image'])) {
$image_id = sanitize_text_field($_POST['department_image']);
update_term_meta($term_id, 'department_image', $image_id);
}
}
add_action('edited_department', 'save_department_taxonomy_image');
add_action('create_department', 'save_department_taxonomy_image');### Step 4: Enqueue Media Uploader Scripts
This part of the code enables the media uploader on the `department` taxonomy edit page.
// Enqueue the media uploader script for the department taxonomy
function enqueue_department_taxonomy_image_scripts($hook) {
// Only enqueue on the taxonomy edit screen
if ('edit-tags.php' !== $hook) {
return;
}
// Ensure we're on the correct taxonomy page
if ('department' !== $_GET['taxonomy']) {
return;
}
wp_enqueue_media(); // Enqueue the media uploader
?>
<script type="text/javascript">
jQuery(document).ready(function($) {
// Open media uploader when the button is clicked
$('#upload_image_button').click(function(e) {
e.preventDefault();
var media_uploader = wp.media({
title: '<?php _e('Choose an Image', 'textdomain'); ?>',
button: {
text: '<?php _e('Use this Image', 'textdomain'); ?>'
},
multiple: false
})
.on('select', function() {
var attachment = media_uploader.state().get('selection').first().toJSON();
$('#department_image').val(attachment.id);
$('#department_image_preview').html('<img src="' + attachment.url + '" style="max-width: 200px;">');
})
.open();
});
});
</script>
<?php
}
add_action('admin_enqueue_scripts', 'enqueue_department_taxonomy_image_scripts');### Explanation of Changes:
– **Step 1**: The taxonomy name is now `department` instead of `custom_taxonomy`.
– **Step 2**: The term image field is added with the ID and name changed to `department_image`.
– **Step 3**: The function to save the image ID uses `department_image` as the meta key for storing the image ID in the term's metadata.
– **Step 4**: The media uploader script is specifically loaded only for the `department` taxonomy on the term edit page.
This will allow you to upload and display images for terms within your `department` taxonomy directly from the WordPress admin interface.
### Step 1: Define the URL Structure for `department` Term Pages
WordPress automatically creates term pages for custom taxonomies, so you just need to ensure that your custom taxonomy is set to use nice permalinks.
Typically, the URL structure for terms in a taxonomy would look like this:
/department/term-name/To enable this, ensure your custom taxonomy is registered with `'rewrite' => true` (or specify a custom rewrite structure if needed).
// Register a custom taxonomy 'department' with rewrite rules
function create_department_taxonomy() {
$args = array(
'labels' => array(
'name' => 'Departments',
'singular_name' => 'Department',
),
'hierarchical' => true,
'show_ui' => true,
'show_admin_column' => true,
'query_var' => true,
'rewrite' => array(
'slug' => 'department', // Customize the slug if needed
'with_front' => false, // Optional: removes base from URL
),
);
register_taxonomy('department', 'post', $args); // Replace 'post' with your custom post type if needed
}
add_action('init', 'create_department_taxonomy');This code ensures that each `department` term has a URL like:
/department/term-name/### Step 2: Create a Template for Term Pages
WordPress uses specific templates to display taxonomy term pages. The typical template hierarchy for taxonomy term pages is:
– `taxonomy-{taxonomy}.php` — For a specific taxonomy.
– `taxonomy.php` — For all taxonomies.
– `archive.php` — Default archive template.
Since you are using the custom taxonomy `department`, the most specific template is `taxonomy-department.php`.
Create a file named `taxonomy-department.php` in your theme folder. This will be used to display individual department term pages.
### Step 3: Add Code to Display Terms in `taxonomy-department.php`
In the `taxonomy-department.php` template file, you can query the posts associated with the specific term. For example, here’s a simple template that displays the term name, description, and the posts associated with the term:
<?php
get_header();
// Get the current department term object
$current_term = get_queried_object();
// Display the term name and description
echo '<h1>' . esc_html($current_term->name) . '</h1>';
echo '<p>' . esc_html($current_term->description) . '</p>';
// Query the posts associated with the current department term
$args = array(
'post_type' => 'post', // Replace with your custom post type if needed
'tax_query' => array(
array(
'taxonomy' => 'department',
'field' => 'id',
'terms' => $current_term->term_id,
'operator' => 'IN',
),
),
);
$query = new WP_Query($args);
// Loop through and display the posts
if ($query->have_posts()) :
while ($query->have_posts()) : $query->the_post();
?>
<div class="department-post">
<h2><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>
<p><?php the_excerpt(); ?></p>
</div>
<?php
endwhile;
else :
echo '<p>No posts found in this department.</p>';
endif;
// Reset post data
wp_reset_postdata();
get_footer();### Step 4: Display the Image on the Term Page (Optional)
If you've added an image to your department taxonomy terms (as in the previous steps), you can also display that image on the term page. Modify the code in `taxonomy-department.php` to retrieve and display the image.
<?php
get_header();
// Get the current department term object
$current_term = get_queried_object();
// Retrieve the image ID
$image_id = get_term_meta($current_term->term_id, 'department_image', true);
$image_url = $image_id ? wp_get_attachment_url($image_id) : '';
// Display the term name, description, and image (if available)
echo '<h1>' . esc_html($current_term->name) . '</h1>';
if ($image_url) {
echo '<img src="' . esc_url($image_url) . '" alt="' . esc_attr($current_term->name) . '" style="max-width: 200px; margin-bottom: 20px;">';
}
echo '<p>' . esc_html($current_term->description) . '</p>';
// Query the posts associated with the current department term
$args = array(
'post_type' => 'post', // Replace with your custom post type if needed
'tax_query' => array(
array(
'taxonomy' => 'department',
'field' => 'id',
'terms' => $current_term->term_id,
'operator' => 'IN',
),
),
);
$query = new WP_Query($args);
// Loop through and display the posts
if ($query->have_posts()) :
while ($query->have_posts()) : $query->the_post();
?>
<div class="department-post">
<h2><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>
<p><?php the_excerpt(); ?></p>
</div>
<?php
endwhile;
else :
echo '<p>No posts found in this department.</p>';
endif;
// Reset post data
wp_reset_postdata();
get_footer();### Step 5: Flush Permalinks
After adding or modifying taxonomies, it’s essential to flush WordPress’s rewrite rules to ensure the correct URL structure is applied.
To do this:
1. Go to **Settings** > **Permalinks** in your WordPress admin panel.
2. Simply click **Save Changes** (even if you don't make any changes). This will refresh the rewrite rules.
### Final Thoughts:
– **URL Structure**: The term pages for `department` will be accessible via `/department/term-name/`.
– **Template**: You can customize the `taxonomy-department.php` template to match your design and show content from the `department` taxonomy.
– **Image Display**: If you've uploaded images for each department term, they can be displayed on the term pages.
This will give you a fully functioning term page for your custom `department` taxonomy, showing posts associated with the term and optionally displaying the term's image.
Here's how you can add an image upload field to the "Add New Term" form:
### Step 1: Add Image Upload Field to the Add New Term Form
Use the `department_add_form_fields` hook to add the custom field for image upload when adding a new term to the `department` taxonomy.
// Add image field to the Add New Term form for 'department' taxonomy
function add_department_taxonomy_image_field_add_form() {
?>
<div class="form-field term-group">
<label for="department_image"><?php _e('Image', 'textdomain'); ?></label>
<input type="hidden" id="department_image" name="department_image" value="" />
<div id="department_image_preview"></div>
<button class="button" id="upload_image_button"><?php _e('Upload Image', 'textdomain'); ?></button>
</div>
<?php
}
add_action('department_add_form_fields', 'add_department_taxonomy_image_field_add_form');### Step 2: Enqueue the Media Uploader Scripts for the Add New Term Page
You’ll need to enqueue the WordPress media uploader script for the image field to work. This ensures that the user can click the button to open the WordPress media uploader.
// Enqueue the media uploader script for Add New Term form
function enqueue_department_taxonomy_image_scripts_add_form($hook) {
// Only enqueue on the taxonomy add term screen
if ('term.php' !== $hook) {
return;
}
// Ensure we're on the correct taxonomy page
if ('department' !== $_GET['taxonomy']) {
return;
}
wp_enqueue_media(); // Enqueue the media uploader
?>
<script type="text/javascript">
jQuery(document).ready(function($) {
// Open media uploader when the button is clicked
$('#upload_image_button').click(function(e) {
e.preventDefault();
var media_uploader = wp.media({
title: '<?php _e('Choose an Image', 'textdomain'); ?>',
button: {
text: '<?php _e('Use this Image', 'textdomain'); ?>'
},
multiple: false
})
.on('select', function() {
var attachment = media_uploader.state().get('selection').first().toJSON();
$('#department_image').val(attachment.id);
$('#department_image_preview').html('<img src="' + attachment.url + '" style="max-width: 200px;">');
})
.open();
});
});
</script>
<?php
}
add_action('admin_enqueue_scripts', 'enqueue_department_taxonomy_image_scripts_add_form');### Step 3: Save the Image ID When the Term is Created
When a new term is added, we need to save the image ID in the term meta. Use the `created_department` action to save the image ID.
// Save the image ID when a new department term is created
function save_department_taxonomy_image_add_form($term_id) {
if (isset($_POST['department_image'])) {
$image_id = sanitize_text_field($_POST['department_image']);
if ($image_id) {
update_term_meta($term_id, 'department_image', $image_id);
}
}
}
add_action('created_department', 'save_department_taxonomy_image_add_form');### Summary of the Process:
1. **`add_department_taxonomy_image_field_add_form`**: Adds an image upload button on the "Add New Term" form for the `department` taxonomy.
2. **`enqueue_department_taxonomy_image_scripts_add_form`**: Enqueues the media uploader script so the user can select an image.
3. **`save_department_taxonomy_image_add_form`**: Saves the image ID when a new department term is created.
This code will display an image upload field when you add a new term to the `department` taxonomy. The image selected will be saved in the term meta under the key `department_image`.
wp-admin/edit-tags.php?taxonomy=department&post_type=vehicles
### Step 1: Add the Image Upload Field to the "Add New Term" Form
This will add the image upload field to the **Add New Term** form specifically for the `department` taxonomy.
// Add image field to the Add New Term form for 'department' taxonomy
function add_department_taxonomy_image_field_add_form() {
?>
<div class="form-field term-group">
<label for="department_image"><?php _e('Image', 'textdomain'); ?></label>
<input type="hidden" id="department_image" name="department_image" value="" />
<div id="department_image_preview"></div>
<button class="button" id="upload_image_button"><?php _e('Upload Image', 'textdomain'); ?></button>
</div>
<?php
}
add_action('department_add_form_fields', 'add_department_taxonomy_image_field_add_form');### Step 2: Enqueue the Media Uploader Scripts
Make sure to enqueue the WordPress media uploader script so that the "Upload Image" button works on the **Add New Term** form.
// Enqueue the media uploader script for Add New Term form
function enqueue_department_taxonomy_image_scripts_add_form($hook) {
// Only enqueue on the taxonomy add term screen
if ('term.php' !== $hook) {
return;
}
// Ensure we're on the correct taxonomy page
if ('department' !== $_GET['taxonomy']) {
return;
}
wp_enqueue_media(); // Enqueue the media uploader
?>
<script type="text/javascript">
jQuery(document).ready(function($) {
// Open media uploader when the button is clicked
$('#upload_image_button').click(function(e) {
e.preventDefault();
var media_uploader = wp.media({
title: '<?php _e('Choose an Image', 'textdomain'); ?>',
button: {
text: '<?php _e('Use this Image', 'textdomain'); ?>'
},
multiple: false
})
.on('select', function() {
var attachment = media_uploader.state().get('selection').first().toJSON();
$('#department_image').val(attachment.id);
$('#department_image_preview').html('<img src="' + attachment.url + '" style="max-width: 200px;">');
})
.open();
});
});
</script>
<?php
}
add_action('admin_enqueue_scripts', 'enqueue_department_taxonomy_image_scripts_add_form');### Step 3: Save the Image ID When the Term is Created
Now, you need to save the selected image ID when a new term is created. We'll use the `created_department` action for that.
// Save the image ID when a new department term is created
function save_department_taxonomy_image_add_form($term_id) {
if (isset($_POST['department_image'])) {
$image_id = sanitize_text_field($_POST['department_image']);
if ($image_id) {
update_term_meta($term_id, 'department_image', $image_id);
}
}
}
add_action('created_department', 'save_department_taxonomy_image_add_form');### Step 4: Add Image Upload to the "Edit Term" Form
To add the image upload field to the **Edit Term** form for the `department` taxonomy, use the `department_edit_form_fields` hook.
// Add image field to the Edit Term form for 'department' taxonomy
function add_department_taxonomy_image_field_edit_form($term) {
// Retrieve the image ID
$image_id = get_term_meta($term->term_id, 'department_image', true);
$image_url = $image_id ? wp_get_attachment_url($image_id) : '';
?>
<tr class="form-field term-group">
<th scope="row">
<label for="department_image"><?php _e('Image', 'textdomain'); ?></label>
</th>
<td>
<input type="hidden" id="department_image" name="department_image" value="<?php echo esc_attr($image_id); ?>" />
<div id="department_image_preview">
<?php if ($image_url): ?>
<img src="<?php echo esc_url($image_url); ?>" style="max-width: 200px;">
<?php endif; ?>
</div>
<button class="button" id="upload_image_button"><?php _e('Upload Image', 'textdomain'); ?></button>
</td>
</tr>
<?php
}
add_action('department_edit_form_fields', 'add_department_taxonomy_image_field_edit_form');### Step 5: Save the Image ID When the Term is Edited
When the term is edited, the image ID should also be saved. Use the `edited_department` action for this:
// Save the image ID when editing a department term
function save_department_taxonomy_image_edit_form($term_id) {
if (isset($_POST['department_image'])) {
$image_id = sanitize_text_field($_POST['department_image']);
if ($image_id) {
update_term_meta($term_id, 'department_image', $image_id);
}
}
}
add_action('edited_department', 'save_department_taxonomy_image_edit_form');### Summary:
1. **Add Image Upload to "Add New Term"**: We use the `department_add_form_fields` hook to add an image upload field when adding a new term.
2. **Enqueue Media Uploader**: The media uploader is enabled with `enqueue_department_taxonomy_image_scripts_add_form`.
3. **Save Image on Term Creation**: The image ID is saved when a new department term is created using the `created_department` hook.
4. **Add Image Upload to "Edit Term"**: We add the image field to the "Edit Term" form with `department_edit_form_fields`.
5. **Save Image on Term Edit**: The image ID is saved when editing a department term using the `edited_department` hook.
Now you can upload and display images for the `department` taxonomy on both the **Add New Term** and **Edit Term** forms in the WordPress admin under the `vehicles` post type.
### Step-by-Step Troubleshooting
1. **Ensure jQuery is Loaded**:
WordPress ships with jQuery by default, but we need to make sure it's available on the admin pages.
The `wp_enqueue_media()` function ensures that WordPress's media uploader is available, but if jQuery isn't loaded, the script will fail. To explicitly include it, add this code inside the `enqueue_department_taxonomy_image_scripts_add_form` function:
function enqueue_department_taxonomy_image_scripts_add_form($hook) {
// Only enqueue on the taxonomy add term screen
if ('term.php' !== $hook) {
return;
}
// Ensure we're on the correct taxonomy page
if ('department' !== $_GET['taxonomy']) {
return;
}
wp_enqueue_media(); // Enqueue the media uploader
wp_enqueue_script('jquery'); // Ensure jQuery is available
}
add_action('admin_enqueue_scripts', 'enqueue_department_taxonomy_image_scripts_add_form');2. **Check JavaScript Console for Errors**:
Open the browser's Developer Tools (usually `F12` or `Ctrl+Shift+I`) and go to the **Console** tab. If there are any JavaScript errors, they will appear here. Addressing these errors will help us debug the issue.
Some common issues could be:
– Undefined variables
– Missing functions like `wp.media()`
– Issues with jQuery selectors not targeting elements correctly
3. **Correct JavaScript for the Button and Media Uploader**:
Here’s the corrected JavaScript code that should work for both **Add New Term** and **Edit Term** forms:
<script type="text/javascript">
jQuery(document).ready(function($) {
// Open media uploader when the button is clicked
$('#upload_image_button').click(function(e) {
e.preventDefault();
var media_uploader = wp.media({
title: '<?php _e('Choose an Image', 'textdomain'); ?>',
button: {
text: '<?php _e('Use this Image', 'textdomain'); ?>'
},
multiple: false
})
.on('select', function() {
var attachment = media_uploader.state().get('selection').first().toJSON();
$('#department_image').val(attachment.id);
$('#department_image_preview').html('<img src="' + attachment.url + '" style="max-width: 200px;">');
})
.open();
});
});
</script>4. **Verify jQuery Selectors**:
The `#upload_image_button` selector must match the ID of the button in the HTML. Ensure that the button you're targeting has the correct ID:
<button class="button" id="upload_image_button"><?php _e('Upload Image', 'textdomain'); ?></button>The `#department_image` field should be the hidden input field where the image ID is stored. Ensure that the ID is correctly referenced.
5. **Enqueue Scripts on Correct Admin Page**:
Verify that your JavaScript and media uploader are only being enqueued on the taxonomy term pages. If you are seeing the image upload button on pages where it shouldn't be (like post editor or other admin pages), the script could conflict. Ensure it's only loaded on the **Add New Term** and **Edit Term** pages for the `department` taxonomy.
function enqueue_department_taxonomy_image_scripts_add_form($hook) {
if ('term.php' !== $hook) {
return;
}
// Only enqueue on the 'department' taxonomy page
if ('department' !== $_GET['taxonomy']) {
return;
}
wp_enqueue_media(); // Enqueue media uploader
wp_enqueue_script('jquery'); // Enqueue jQuery if not already loaded
}
add_action('admin_enqueue_scripts', 'enqueue_department_taxonomy_image_scripts_add_form');### Step 6: Check for Conflicts with Other Scripts
Sometimes other JavaScript files may conflict with the WordPress media uploader. To troubleshoot this:
– Temporarily disable other custom JavaScript files and check if the uploader works.
– Look at the browser console for any errors or conflicts related to scripts.
### Final Working Code Example
Here's the complete working example with all the fixes:
// Add image field to the Add New Term form for 'department' taxonomy
function add_department_taxonomy_image_field_add_form() {
?>
<div class="form-field term-group">
<label for="department_image"><?php _e('Image', 'textdomain'); ?></label>
<input type="hidden" id="department_image" name="department_image" value="" />
<div id="department_image_preview"></div>
<button class="button" id="upload_image_button"><?php _e('Upload Image', 'textdomain'); ?></button>
</div>
<?php
}
add_action('department_add_form_fields', 'add_department_taxonomy_image_field_add_form');
// Enqueue the media uploader script for Add New Term form
function enqueue_department_taxonomy_image_scripts_add_form($hook) {
if ('term.php' !== $hook) {
return;
}
if ('department' !== $_GET['taxonomy']) {
return;
}
wp_enqueue_media();
wp_enqueue_script('jquery');
?>
<script type="text/javascript">
jQuery(document).ready(function($) {
// Open media uploader when the button is clicked
$('#upload_image_button').click(function(e) {
e.preventDefault();
var media_uploader = wp.media({
title: '<?php _e('Choose an Image', 'textdomain'); ?>',
button: {
text: '<?php _e('Use this Image', 'textdomain'); ?>'
},
multiple: false
})
.on('select', function() {
var attachment = media_uploader.state().get('selection').first().toJSON();
$('#department_image').val(attachment.id);
$('#department_image_preview').html('<img src="' + attachment.url + '" style="max-width: 200px;">');
})
.open();
});
});
</script>
<?php
}
add_action('admin_enqueue_scripts', 'enqueue_department_taxonomy_image_scripts_add_form');
// Save image ID when a new department term is created
function save_department_taxonomy_image_add_form($term_id) {
if (isset($_POST['department_image'])) {
$image_id = sanitize_text_field($_POST['department_image']);
if ($image_id) {
update_term_meta($term_id, 'department_image', $image_id);
}
}
}
add_action('created_department', 'save_department_taxonomy_image_add_form');
// Add image field to the Edit Term form for 'department' taxonomy
function add_department_taxonomy_image_field_edit_form($term) {
$image_id = get_term_meta($term->term_id, 'department_image', true);
$image_url = $image_id ? wp_get_attachment_url($image_id) : '';
?>
<tr class="form-field term-group">
<th scope="row">
<label for="department_image"><?php _e('Image', 'textdomain'); ?></label>
</th>
<td>
<input type="hidden" id="department_image" name="department_image" value="<?php echo esc_attr($image_id); ?>" />
<div id="department_image_preview">
<?php if ($image_url): ?>
<img src="<?php echo esc_url($image_url); ?>" style="max-width: 200px;">
<?php endif; ?>
</div>
<button class="button" id="upload_image_button"><?php _e('Upload Image', 'textdomain'); ?></button>
</td>
</tr>
<?php
}
add_action('department_edit_form_fields', 'add_department_taxonomy_image_field_edit_form');
// Save image ID when editing a department term
function save_department_taxonomy_image_edit_form($term_id) {
if (isset($_POST['department_image'])) {
$image_id = sanitize_text_field($_POST['department_image']);
if ($image_id) {
update_term_meta($term_id, 'department_image', $image_id);
}
}
}
add_action('edited_department', 'save_department_taxonomy_image_edit_form');### Conclusion:
– Ensure jQuery is correctly loaded.
– Verify the JavaScript selectors are correct.
– Check for console errors to help identify any issues.
$('body').on('click', '.aw_upload_image_button', function(e){
e.preventDefault();
aw_uploader = wp.media({
title: 'Custom image',
button: {
text: 'Use this image'
},
multiple: false
}).on('select', function() {
var attachment = aw_uploader.state().get('selection').first().toJSON();
$('#department_image').val(attachment.url);
})
.open();
});
});
display preview image
### Updated HTML and JavaScript
<div class="form-field term-group">
<label for="department_image"><?php _e('Image', 'textdomain'); ?></label>
<input type="hidden" id="department_image" name="department_image" value="" />
<div id="department_image_preview"></div>
<button class="button aw_upload_image_button"><?php _e('Upload Image', 'textdomain'); ?></button>
</div>
<script type="text/javascript">
jQuery(function($){
$('body').on('click', '.aw_upload_image_button', function(e){
e.preventDefault();
// Open the media uploader
var aw_uploader = wp.media({
title: '<?php _e('Choose an Image', 'textdomain'); ?>',
button: {
text: '<?php _e('Use this Image', 'textdomain'); ?>'
},
multiple: false
})
.on('select', function() {
var attachment = aw_uploader.state().get('selection').first().toJSON();
// Get the image URL and update the hidden input
var imageUrl = attachment.url;
$('#department_image').val(imageUrl);
// Display the preview image
$('#department_image_preview').html('<img src="' + imageUrl + '" style="max-width: 200px;"/>');
})
.open();
});
});
</script>### Explanation:
1. **Button Click Handler**: The jQuery code listens for the button click (`.aw_upload_image_button`). When clicked, it opens the WordPress media uploader (`wp.media`).
2. **Media Selection**: Once the user selects an image, the `on('select')` event is triggered. We retrieve the selected image's URL (`attachment.url`) and set it in the hidden input field (`#department_image`).
3. **Preview Image**: After selecting an image, we update the `#department_image_preview` div with the selected image. The `html()` function is used to add the image inside the `#department_image_preview` div.
4. **Image Style**: The `style="max-width: 200px;"` is applied to ensure the preview image is not too large. You can adjust this style as needed.
### What this code does:
– When the "Upload Image" button is clicked, the media uploader is opened.
– After selecting an image, the image URL is saved in the hidden input field (`#department_image`), and a preview of the image is displayed in the `#department_image_preview` div.
This should now allow you to both select and preview the image on the form before submitting it.
Now I want whenever hover taxonomy link then it will show image accordingly
1. **Create the menu with taxonomy items**.
2. **Use jQuery** to display the corresponding image when the user hovers over each `department` taxonomy item in the menu.
### Step-by-Step Guide
#### 1. Display Taxonomy Items in the Menu
First, ensure that your `department` taxonomy items are being rendered in the WordPress menu. If you're using a custom walker to generate the menu, or a custom walker for `wp_nav_menu()`, you can adjust that walker to include the taxonomy terms.
Example to display `department` taxonomy items in your WordPress menu:
// Custom walker to add department taxonomy image in menu
class WP_Bootstrap_Navwalker extends Walker_Nav_Menu {
// Modify the start of each menu item to include the image
function start_el( &$output, $item, $depth = 0, $args = null, $id = 0 ) {
// Get the term for the current menu item (assuming it's a department taxonomy link)
$term = get_term_by('id', $item->object_id, 'department');
if ($term) {
$image_url = get_term_meta($term->term_id, 'department_image', true);
$image = $image_url ? '<img src="' . esc_url($image_url) . '" class="department-image" style="display:none; max-width: 200px;"/>' : '';
} else {
$image = '';
}
// Add the image HTML to the output
$output .= '<li class="menu-item"><a href="' . esc_url($item->url) . '">' . esc_html($item->title) . '</a>' . $image . '</li>';
}
}Then, use this custom walker in your `wp_nav_menu()` function:
wp_nav_menu(array(
'theme_location' => 'your_menu_location',
'walker' => new WP_Bootstrap_Navwalker(), // Use the custom walker
'menu_class' => 'nav-menu',
));This will add the `department_image` (stored in term metadata) as an image within each menu item.
#### 2. Show Image on Hover with jQuery
Now, we'll write some jQuery to show the image when the user hovers over a `department` taxonomy menu item.
Add this jQuery in the footer or enqueue it properly:
jQuery(function($) {
// When hovering over a menu item with department image
$('.menu-item').hover(
function() {
// On hover: show the image
var image = $(this).find('.department-image');
if (image.length > 0) {
image.stop(true, true).fadeIn(); // Fade in the image
}
},
function() {
// On hover out: hide the image
var image = $(this).find('.department-image');
if (image.length > 0) {
image.stop(true, true).fadeOut(); // Fade out the image
}
}
);
});### 3. Add CSS for the Mega Menu
You'll likely need some custom CSS to make your mega menu look nice. Here's a basic CSS to style the images that show on hover:
/* Style the mega menu container */
.nav-menu {
position: relative;
}
/* Hide the images by default */
.department-image {
display: none;
margin-top: 10px;
max-width: 200px; /* Adjust as needed */
}
/* Optional: Style the menu items */
.menu-item {
position: relative;
}
/* Optional: Add hover effect on menu item */
.menu-item:hover {
background-color: #f0f0f0;
}### 4. Explanation of the Process:
– **Walker Class**: The `WP_Bootstrap_Navwalker` (or your custom walker) is used to loop through each menu item. We check if the menu item corresponds to a `department` taxonomy and then retrieve the image stored in the term metadata (`get_term_meta()`).
– **Image Display**: The image HTML is inserted in the menu item as a hidden element (`display:none`). The jQuery is responsible for showing and hiding the image based on hover events.
– **Hover Event**: When the user hovers over a menu item, the corresponding image fades in. When the user stops hovering, the image fades out.
### 5. Final Notes:
– You may need to adjust the CSS for the image size and the position of the image relative to the menu items, depending on the layout of your mega menu.
– If you have more complex mega menu structures, such as dropdowns or columns, you can modify the jQuery and CSS to ensure the image appears in the correct location within the mega menu.
This solution should work for your requirement of displaying an image for each department taxonomy item when hovered in a mega menu.
Here’s how we can do this:
### Step-by-Step Solution
1. **Make Sure Taxonomy Term Image is Available in the Menu**:
First, we need to ensure that the `department` taxonomy terms have an image stored in their term metadata. If this is already done, great!
2. **Modify Your Menu to Include Custom Attributes for Hover**:
You’ll need to ensure that each menu item representing a `department` taxonomy term has the term ID or slug as a class or data attribute, so we can associate it with the correct image.
Assuming you are using `wp_nav_menu()`, you can modify the output of the menu to add a `data-department-id` attribute for each `department` taxonomy item.
### Example Code
#### 1. Modify Menu Output to Add Custom Attributes
If you have access to modify the menu output, you can use the `walker_nav_menu_start_el` filter to add a custom attribute to each `department` taxonomy menu item.
Here's how you can modify the menu to add a custom data attribute for the `department` taxonomy term:
// Modify the menu item to add a custom attribute with the taxonomy term ID
function add_department_term_id_to_menu($output, $item, $args) {
if ($item->object == 'department') { // Check if the item is from 'department' taxonomy
$term = get_term_by('id', $item->object_id, 'department');
// If term exists, add its ID or slug as a data attribute
if ($term) {
$image_url = get_term_meta($term->term_id, 'department_image', true); // Get the image URL
if ($image_url) {
// Add data attribute with the term image URL
$output = str_replace(
'<a',
'<a data-department-image="' . esc_url($image_url) . '"',
$output
);
}
}
}
return $output;
}
add_filter('walker_nav_menu_start_el', 'add_department_term_id_to_menu', 10, 3);This will modify each menu item that corresponds to the `department` taxonomy by adding a `data-department-image` attribute with the image URL.
#### 2. Use jQuery to Show the Image on Hover
Now, you can use jQuery to show the image when hovering over the menu items that have this attribute. We'll display the image dynamically in a specific container (like a mega menu area or a dedicated image display area).
Here’s the jQuery you need to add:
jQuery(function($) {
// When hovering over a menu item with a department image
$('.menu-item').hover(
function() {
var imageUrl = $(this).find('a').data('department-image'); // Get the image URL from the data attribute
// Check if there is an image URL
if (imageUrl) {
// Show the image in a container (you can change #department_image_preview to your preferred container)
$('#department_image_preview').html('<img src="' + imageUrl + '" style="max-width: 200px;"/>').fadeIn();
}
},
function() {
// On hover out: hide the image
$('#department_image_preview').fadeOut(); // Hide the image preview
}
);
});### 3. Display the Image in a Specific Container
Make sure you have an HTML container (or a div) in your page where the image will be displayed when hovering over the menu item. For example, you can add this in the HTML structure of your mega menu or somewhere suitable on the page:
<div id="department_image_preview" style="display:none; margin-top: 10px;"></div>You can place this container wherever you want the image to appear when hovering over the taxonomy menu items.
### 4. Add CSS for Styling
You might want to add some CSS to style the image and ensure it displays properly in your layout:
#department_image_preview {
display: none;
max-width: 200px; /* Adjust as needed */
margin-top: 10px;
}
.menu-item {
position: relative;
}
/* Optional: add hover effect */
.menu-item:hover {
background-color: #f0f0f0;
}### Final Flow:
1. **Menu Structure**: Your existing menu items will have the `data-department-image` attribute containing the image URL for the `department` taxonomy.
2. **Hover Event**: When the user hovers over a menu item with a `department` taxonomy, the image linked to that taxonomy term will appear in the `#department_image_preview` container.
3. **CSS**: You can style the image container and menu items as needed.
### Conclusion:
– This approach allows you to dynamically show an image associated with a `department` taxonomy term when hovering over the corresponding menu item.
– You don't need to modify your existing menu structure too much — just add a custom `data` attribute to each menu item and use jQuery to show the image on hover.
### Steps:
1. **Use the `wp_nav_menu_items` filter** to add a custom `data-department-image` attribute to the taxonomy items in the menu.
2. **Add jQuery** to handle the hover effect and display the corresponding image.
3. **Use CSS** to style the image and ensure it displays correctly when hovered.
### 1. Add `data-department-image` to Menu Items
You can use the `wp_nav_menu_items` filter to dynamically add custom attributes (like `data-department-image`) to the menu items. Here’s the code that will add the image URL as a data attribute to each `department` taxonomy menu item.
#### PHP Code (functions.php):
function add_department_image_to_menu($items, $args) {
// Check if it's the menu we want to modify (replace 'primary' with your menu location)
if ($args->theme_location == 'primary') {
// Loop through each menu item
foreach ($items as $item) {
// Check if the menu item is a department taxonomy term
if ($item->object == 'department') {
$term = get_term_by('id', $item->object_id, 'department');
if ($term) {
$image_url = get_term_meta($term->term_id, 'department_image', true);
if ($image_url) {
// Add the data attribute with the department image URL
$items = str_replace(
'<a href="' . esc_url($item->url) . '"',
'<a href="' . esc_url($item->url) . '" data-department-image="' . esc_url($image_url) . '"',
$items
);
}
}
}
}
}
return $items;
}
add_filter('wp_nav_menu_items', 'add_department_image_to_menu', 10, 2);### Explanation:
– This function adds a `data-department-image` attribute to each menu item that links to a `department` taxonomy term.
– It checks if the current menu item corresponds to a `department` taxonomy and fetches the term’s image URL using `get_term_meta`.
– The `wp_nav_menu_items` filter is used to modify the menu HTML and add the image URL as a data attribute to the anchor tag (“).
### 2. jQuery to Show Image on Hover
Once you’ve added the image URL to the menu item, you can use jQuery to show the image when the user hovers over the menu item.
#### jQuery Code:
Add this jQuery code to handle the hover effect, which will display the image when hovering over a `department` taxonomy menu item.
jQuery(function($) {
// When hovering over a menu item with the department image
$('.menu-item').hover(
function() {
// Get the image URL from the data attribute
var imageUrl = $(this).find('a').data('department-image');
// Check if the image URL exists
if (imageUrl) {
// Display the image (change #department_image_preview to your desired container)
$('#department_image_preview').html('<img src="' + imageUrl + '" style="max-width: 200px;"/>').fadeIn();
}
},
function() {
// On hover out, hide the image
$('#department_image_preview').fadeOut(); // Hide the image preview
}
);
});### Explanation:
– **Hover Function**: When the user hovers over a `.menu-item`, it checks if the `data-department-image` attribute exists in the anchor tag (“).
– If the attribute exists, it will insert the corresponding image in the `#department_image_preview` container.
– **Fade In/Out**: The image will fade in on hover and fade out when the user stops hovering.
### 3. Add CSS to Style the Image
You may want to style the image so it looks good on the page. Here’s some basic CSS:
#department_image_preview {
display: none; /* Hide by default */
max-width: 200px; /* Adjust to desired width */
margin-top: 10px; /* Adjust spacing as needed */
}
/* Optional: You can also add custom styles for the menu items */
.menu-item {
position: relative;
}
/* Optional: Add hover effect on menu item */
.menu-item:hover {
background-color: #f0f0f0;
}### 4. Add HTML for the Image Preview
You need a container on your page where the image will be displayed when hovering over the menu item. This can be placed inside your theme’s layout where you want the image to appear (for example, near your mega menu).
<div id="department_image_preview"></div>### Summary:
1. **PHP (`functions.php`)**: We used the `wp_nav_menu_items` filter to add a `data-department-image` attribute to each menu item that corresponds to a `department` taxonomy.
2. **jQuery**: When the user hovers over a menu item, jQuery grabs the `data-department-image` attribute and shows the corresponding image in the `#department_image_preview` container.
3. **CSS**: Styling for the image preview and hover effect on the menu.
This approach works with default WordPress hooks, and it leverages the `wp_nav_menu_items` filter to modify the menu output dynamically, making it easy to integrate with your existing WordPress menu structure.