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The best way to understand what a hook does is to look at where it occurs in the source code.
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.
| Line | Code |
|---|---|
| 491 | * |
| 492 | * The filter is evaluated for all image sizes except 'full'. |
| 493 | * |
| 494 | * @since 3.1.0 |
| 495 | * |
| 496 | * @param string $path Path to the current image. |
| 497 | * @param string $attachment_id Attachment ID. |
| 498 | * @param string $size Size of the image. |
| 499 | */ |
| 500 | $filepath = apply_filters( 'load_image_to_edit_filesystempath', path_join( dirname( $filepath ), $data['file'] ), $attachment_id, $size ); |
| 501 | } |
| 502 | } elseif ( function_exists( 'fopen' ) && function_exists( 'ini_get' ) && true == ini_get( 'allow_url_fopen' ) ) { |
| 503 | /** |
| 504 | * Filter the image URL if not in the local filesystem. |
| 505 | * |
| 506 | * The filter is only evaluated if fopen is enabled on the server. |
| 507 | * |
| 508 | * @since 3.1.0 |
| 509 | * |