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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.
| Line | Code |
|---|---|
| 389 | break; |
| 390 | case 'image/gif': |
| 391 | $image = imagecreatefromgif($filepath); |
| 392 | break; |
| 393 | default: |
| 394 | $image = false; |
| 395 | break; |
| 396 | } |
| 397 | if ( is_resource($image) ) { |
| 398 | $image = apply_filters('load_image_to_edit', $image, $attachment_id, $size); |
| 399 | if ( function_exists('imagealphablending') && function_exists('imagesavealpha') ) { |
| 400 | imagealphablending($image, false); |
| 401 | imagesavealpha($image, true); |
| 402 | } |
| 403 | } |
| 404 | return $image; |
| 405 | } |
| 406 | |
| 407 | /** |