Filter hook 'image_downsize'

Hook Information

Hook Parameters

Usage Examples

<?php
// Hook into image_downsize
add_filter('image_downsize', 'my_custom_filter');

function my_custom_filter() {
    // Your custom filtering logic here
    return 'modified_value';
}

Source Code Context

<?php
4614  		 * to check the image metadata, which we do second.
4615  		 */
4616  		foreach ( $possible_sizes as $size => $label ) {
4617  
4618  			/** This filter is documented in wp-includes/media.php */
4619  			$downsize = apply_filters( 'image_downsize', false, $attachment->ID, $size );
4620  
4621  			if ( $downsize ) {
4622  				if ( empty( $downsize[3] ) ) {
4623  					continue;
4624  				}

PHP Documentation

<?php
/** This filter is documented in wp-admin/includes/media.php */
		$possible_sizes = apply_filters(
			'image_size_names_choose',
			array(
				'thumbnail' => __( 'Thumbnail' ),
				'medium'    => __( 'Medium' ),
				'large'     => __( 'Large' ),
				'full'      => __( 'Full Size' ),
			)
		);
		unset( $possible_sizes['full'] );

		/*
		 * Loop through all potential sizes that may be chosen. Try to do this with some efficiency.
		 * First: run the image_downsize filter. If it returns something, we can use its data.
		 * If the filter does not return something, then image_downsize() is just an expensive way
		 * to check the image metadata, which we do second.
		 */