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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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297 |
|
298 | /** |
299 | * Filters the WP_Image_Editor instance for the image to be streamed to the browser. |
300 | * |
301 | * @since 3.5.0 |
302 | * |
303 | * @param WP_Image_Editor $image The image editor instance. |
304 | * @param int $attachment_id The attachment post ID. |
305 | */ |
306 | $image = apply_filters( 'image_editor_save_pre', $image, $attachment_id ); |
307 |
|
308 | if ( is_wp_error( $image->stream( $mime_type ) ) ) { |
309 | return false; |
310 | } |
311 |
|
312 | return true; |
313 | } else { |
314 | /* translators: 1: $image, 2: WP_Image_Editor */ |
315 | _deprecated_argument( __FUNCTION__, '3.5.0', sprintf( __( '%1$s needs to be a %2$s object.' ), '$image', 'WP_Image_Editor' ) ); |
Line | Code |
370 | * @type int $height Image height. |
371 | * @type string $mime-type The mime type of the image. |
372 | * @type int $filesize File size of the image. |
373 | * } |
374 | */ |
375 | function wp_save_image_file( $filename, $image, $mime_type, $post_id ) { |
376 | if ( $image instanceof WP_Image_Editor ) { |
377 |
|
378 | /** This filter is documented in wp-admin/includes/image-edit.php */ |
379 | $image = apply_filters( 'image_editor_save_pre', $image, $post_id ); |
380 |
|
381 | /** |
382 | * Filters whether to skip saving the image file. |
383 | * |
384 | * Returning a non-null value will short-circuit the save method, |
385 | * returning that value instead. |
386 | * |
387 | * @since 3.5.0 |
388 | * |