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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 |
---|---|
203 | $image = apply_filters('image_editor_save_pre', $image, $post_id); |
204 |
|
205 | if ( is_wp_error( $image->stream( $mime_type ) ) ) |
206 | return false; |
207 |
|
208 | return true; |
209 | } else { |
210 | _deprecated_argument( __FUNCTION__, '3.5', __( '$image needs to be an WP_Image_Editor object' ) ); |
211 |
|
212 | $image = apply_filters('image_save_pre', $image, $post_id); |
213 |
|
214 | switch ( $mime_type ) { |
215 | case 'image/jpeg': |
216 | header( 'Content-Type: image/jpeg' ); |
217 | return imagejpeg( $image, null, 90 ); |
218 | case 'image/png': |
219 | header( 'Content-Type: image/png' ); |
220 | return imagepng( $image ); |
221 | case 'image/gif': |
Line | Code |
242 | $saved = apply_filters('wp_save_image_editor_file', null, $filename, $image, $mime_type, $post_id); |
243 |
|
244 | if ( null !== $saved ) |
245 | return $saved; |
246 |
|
247 | return $image->save( $filename, $mime_type ); |
248 | } else { |
249 | _deprecated_argument( __FUNCTION__, '3.5', __( '$image needs to be an WP_Image_Editor object' ) ); |
250 |
|
251 | $image = apply_filters('image_save_pre', $image, $post_id); |
252 | $saved = apply_filters('wp_save_image_file', null, $filename, $image, $mime_type, $post_id); |
253 |
|
254 | if ( null !== $saved ) |
255 | return $saved; |
256 |
|
257 | switch ( $mime_type ) { |
258 | case 'image/jpeg': |
259 | return imagejpeg( $image, $filename, apply_filters( 'jpeg_quality', 90, 'edit_image' ) ); |
260 | case 'image/png': |