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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 |
|---|---|
| 422 | |
| 423 | if ( $filepath && file_exists( $filepath ) ) { |
| 424 | if ( 'full' != $size && ( $data = image_get_intermediate_size( $attachment_id, $size ) ) ) { |
| 425 | $filepath = apply_filters( 'load_image_to_edit_filesystempath', path_join( dirname( $filepath ), $data['file'] ), $attachment_id, $size ); |
| 426 | } |
| 427 | } elseif ( function_exists( 'fopen' ) && function_exists( 'ini_get' ) && true == ini_get( 'allow_url_fopen' ) ) { |
| 428 | $filepath = apply_filters( 'load_image_to_edit_attachmenturl', wp_get_attachment_url( $attachment_id ), $attachment_id, $size ); |
| 429 | } |
| 430 | |
| 431 | return apply_filters( 'load_image_to_edit_path', $filepath, $attachment_id, $size ); |
| 432 | } |
| 433 | |
| 434 | /** |
| 435 | * Copy an existing image file. |
| 436 | * |
| 437 | * @since 3.4.0 |
| 438 | * @access private |
| 439 | * |
| 440 | * @param string $attachment_id Attachment ID. |