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do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 192 | * down-sizing the image, returning that value as output instead. |
| 193 | * |
| 194 | * @since 2.5.0 |
| 195 | * |
| 196 | * @param bool $downsize Whether to short-circuit the image downsize. Default false. |
| 197 | * @param int $id Attachment ID for image. |
| 198 | * @param array|string $size Size of image. Image size or array of width and height values (in that order). |
| 199 | * Default 'medium'. |
| 200 | */ |
| 201 | $out = apply_filters( 'image_downsize', false, $id, $size ); |
| 202 | |
| 203 | if ( $out ) { |
| 204 | return $out; |
| 205 | } |
| 206 | |
| 207 | $img_url = wp_get_attachment_url( $id ); |
| 208 | $meta = wp_get_attachment_metadata( $id ); |
| 209 | $width = 0; |
| 210 | $height = 0; |
| Line | Code |
| 3472 | unset( $possible_sizes['full'] ); |
| 3473 | |
| 3474 | // Loop through all potential sizes that may be chosen. Try to do this with some efficiency. |
| 3475 | // First: run the image_downsize filter. If it returns something, we can use its data. |
| 3476 | // If the filter does not return something, then image_downsize() is just an expensive |
| 3477 | // way to check the image metadata, which we do second. |
| 3478 | foreach ( $possible_sizes as $size => $label ) { |
| 3479 | |
| 3480 | /** This filter is documented in wp-includes/media.php */ |
| 3481 | $downsize = apply_filters( 'image_downsize', false, $attachment->ID, $size ); |
| 3482 | |
| 3483 | if ( $downsize ) { |
| 3484 | if ( empty( $downsize[3] ) ) { |
| 3485 | continue; |
| 3486 | } |
| 3487 | |
| 3488 | $sizes[ $size ] = array( |
| 3489 | 'height' => $downsize[2], |
| 3490 | 'width' => $downsize[1], |