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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 3 times in this file.
| Line | Code |
|---|---|
| 217 | // Save the data |
| 218 | $id = wp_insert_attachment($object, $file); |
| 219 | |
| 220 | $upload = array('file' => $file, 'id' => $id); |
| 221 | |
| 222 | list($width, $height, $type, $attr) = getimagesize( $file ); |
| 223 | |
| 224 | if ( $width == HEADER_IMAGE_WIDTH && $height == HEADER_IMAGE_HEIGHT ) { |
| 225 | set_theme_mod('header_image', $url); |
| 226 | $header = apply_filters('wp_create_file_in_uploads', $header); // For replication |
| 227 | return $this->finished(); |
| 228 | } elseif ( $width > HEADER_IMAGE_WIDTH ) { |
| 229 | $oitar = $width / HEADER_IMAGE_WIDTH; |
| 230 | $image = wp_crop_image($file, 0, 0, $width, $height, HEADER_IMAGE_WIDTH, $height / $oitar, false, str_replace(basename($file), 'midsize-'.basename($file), $file)); |
| 231 | $image = apply_filters('wp_create_file_in_uploads', $image); // For replication |
| 232 | |
| 233 | $url = str_replace(basename($url), basename($image), $url); |
| 234 | $width = $width / $oitar; |
| 235 | $height = $height / $oitar; |
| 236 | } else { |
| 237 | $oitar = 1; |
| 238 | } |
| 239 | ?> |
| 240 | |
| Line | Code |
| 267 | function step_3() { |
| 268 | if ( $_POST['oitar'] > 1 ) { |
| 269 | $_POST['x1'] = $_POST['x1'] * $_POST['oitar']; |
| 270 | $_POST['y1'] = $_POST['y1'] * $_POST['oitar']; |
| 271 | $_POST['width'] = $_POST['width'] * $_POST['oitar']; |
| 272 | $_POST['height'] = $_POST['height'] * $_POST['oitar']; |
| 273 | } |
| 274 | |
| 275 | $header = wp_crop_image($_POST['attachment_id'], $_POST['x1'], $_POST['y1'], $_POST['width'], $_POST['height'], HEADER_IMAGE_WIDTH, HEADER_IMAGE_HEIGHT); |
| 276 | $header = apply_filters('wp_create_file_in_uploads', $header); // For replication |
| 277 | |
| 278 | $parent = get_post($_POST['attachment_id']); |
| 279 | |
| 280 | $parent_url = $parent->guid; |
| 281 | |
| 282 | $url = str_replace(basename($parent_url), basename($header), $parent_url); |
| 283 | |
| 284 | set_theme_mod('header_image', $url); |
| 285 | |