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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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268 |
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269 | /** |
270 | * Filters the WP_Image_Editor instance for the image to be streamed to the browser. |
271 | * |
272 | * @since 3.5.0 |
273 | * |
274 | * @param WP_Image_Editor $image The image editor instance. |
275 | * @param int $attachment_id The attachment post ID. |
276 | */ |
277 | $image = apply_filters( 'image_editor_save_pre', $image, $attachment_id ); |
278 |
|
279 | if ( is_wp_error( $image->stream( $mime_type ) ) ) { |
280 | return false; |
281 | } |
282 |
|
283 | return true; |
284 | } else { |
285 | /* translators: 1: $image, 2: WP_Image_Editor */ |
286 | _deprecated_argument( __FUNCTION__, '3.5.0', sprintf( __( '%1$s needs to be a %2$s object.' ), '$image', 'WP_Image_Editor' ) ); |
Line | Code |
321 | * @param WP_Image_Editor $image The image editor instance. |
322 | * @param string $mime_type The mime type of the image. |
323 | * @param int $post_id Attachment post ID. |
324 | * @return bool True on success, false on failure. |
325 | */ |
326 | function wp_save_image_file( $filename, $image, $mime_type, $post_id ) { |
327 | if ( $image instanceof WP_Image_Editor ) { |
328 |
|
329 | /** This filter is documented in wp-admin/includes/image-edit.php */ |
330 | $image = apply_filters( 'image_editor_save_pre', $image, $post_id ); |
331 |
|
332 | /** |
333 | * Filters whether to skip saving the image file. |
334 | * |
335 | * Returning a non-null value will short-circuit the save method, |
336 | * returning that value instead. |
337 | * |
338 | * @since 3.5.0 |
339 | * |