ACF acf/delete_value filter not filtering

The acf/delete_value filter in WordPress allows you to modify the value before it is deleted from the Advanced Custom Fields (ACF) field. By using this filter, you can perform custom actions or modify the value being deleted.

Here’s an example of how to use the acf/delete_value filter:

function wpsnippets_custom_delete_value( $value, $post_id, $field ) {
    // Perform your custom actions or modifications here
    // You can access the $value, $post_id, and $field parameters

    // Return the modified value
    return $value;
}
add_filter( 'acf/delete_value', 'wpsnippets_custom_delete_value', 10, 3 );

In the code snippet above, we define a custom function wpsnippets_custom_delete_value that accepts three parameters: $value, $post_id, and $field. These parameters represent the value being deleted, the post ID of the ACF field, and the ACF field object respectively.

Within the function, you can perform any custom actions or modifications on the $value parameter. This could include validating the value, logging the deletion, or updating related data.

Finally, we use the add_filter function to hook our custom function to the acf/delete_value filter. The filter priority is set to 10, and the number of accepted parameters is set to 3.

By using this code snippet, you can customize the behavior of the acf/delete_value filter to suit your specific needs.

Examples

Example 1: Filtering a value before it is deleted using the acf/delete_value filter

This use case demonstrates how to use the acf/delete_value filter to modify or filter a value before it is deleted from the Advanced Custom Fields (ACF) field.

add_filter('acf/delete_value', 'wpsnippets_filter_delete_value', 10, 3);

function wpsnippets_filter_delete_value($delete, $post_id, $field) {
    // Modify or filter the value before deletion
    $value = get_field($field['name'], $post_id);
    // Perform necessary modifications or filtering
    $modified_value = my_custom_filter_function($value);
    // Return the modified value to be deleted
    return $modified_value;
}

In this code example, we are adding a filter to the acf/delete_value hook and defining a callback function wpsnippets_filter_delete_value. Inside the callback function, we retrieve the current value of the field using get_field and perform any necessary modifications or filtering on the value. Finally, we return the modified value, which will be deleted by ACF.

Example 2: Modifying the value based on the post ID

This use case demonstrates how to modify the value being deleted based on the post ID associated with the field.

add_filter('acf/delete_value', 'wpsnippets_filter_delete_value', 10, 3);

function wpsnippets_filter_delete_value($delete, $post_id, $field) {
    // Modify the value based on the post ID
    if ($post_id === 123) {
        $value = get_field($field['name'], $post_id);
        // Perform necessary modifications
        $modified_value = my_custom_modification_function($value);
        // Return the modified value to be deleted
        return $modified_value;
    }
    return $delete;
}

In this code example, we check if the post ID is equal to a specific value (e.g., 123). If it matches, we retrieve the current value of the field using get_field and perform any necessary modifications on the value. Finally, we return the modified value, which will be deleted by ACF. If the post ID does not match, we simply return the original value without modification.

Example 3: Filtering the value based on the field name

This use case demonstrates how to filter the value being deleted based on the field name.

add_filter('acf/delete_value', 'wpsnippets_filter_delete_value', 10, 3);

function wpsnippets_filter_delete_value($delete, $post_id, $field) {
    // Filter the value based on the field name
    if ($field['name'] === 'my_custom_field') {
        $value = get_field($field['name'], $post_id);
        // Perform necessary filtering
        $filtered_value = my_custom_filter_function($value);
        // Return the filtered value to be deleted
        return $filtered_value;
    }
    return $delete;
}

In this code example, we check if the field name is equal to a specific value (e.g., ‘mycustomfield’). If it matches, we retrieve the current value of the field using get_field and perform any necessary filtering on the value. Finally, we return the filtered value, which will be deleted by ACF. If the field name does not match, we simply return the original value without filtering.