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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.
This hook occurs 2 times in this file.
Line | Code |
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342 |
|
343 | /** |
344 | * Filters the WP_Image_Editor instance for the image to be streamed to the browser. |
345 | * |
346 | * @since 3.5.0 |
347 | * |
348 | * @param WP_Image_Editor $image The image editor instance. |
349 | * @param int $attachment_id The attachment post ID. |
350 | */ |
351 | $image = apply_filters( 'image_editor_save_pre', $image, $attachment_id ); |
352 |
|
353 | if ( is_wp_error( $image->stream( $mime_type ) ) ) { |
354 | return false; |
355 | } |
356 |
|
357 | return true; |
358 | } else { |
359 | /* translators: 1: $image, 2: WP_Image_Editor */ |
360 | _deprecated_argument( __FUNCTION__, '3.5.0', sprintf( __( '%1$s needs to be a %2$s object.' ), '$image', 'WP_Image_Editor' ) ); |
Line | Code |
415 | * @type int $height Image height. |
416 | * @type string $mime-type The mime type of the image. |
417 | * @type int $filesize File size of the image. |
418 | * } |
419 | */ |
420 | function wp_save_image_file( $filename, $image, $mime_type, $post_id ) { |
421 | if ( $image instanceof WP_Image_Editor ) { |
422 |
|
423 | /** This filter is documented in wp-admin/includes/image-edit.php */ |
424 | $image = apply_filters( 'image_editor_save_pre', $image, $post_id ); |
425 |
|
426 | /** |
427 | * Filters whether to skip saving the image file. |
428 | * |
429 | * Returning a non-null value will short-circuit the save method, |
430 | * returning that value instead. |
431 | * |
432 | * @since 3.5.0 |
433 | * |