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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 |
|---|---|
| 338 | break; |
| 339 | case 'image/gif': |
| 340 | $image = imagecreatefromgif($filepath); |
| 341 | break; |
| 342 | default: |
| 343 | $image = false; |
| 344 | break; |
| 345 | } |
| 346 | if ( is_resource($image) ) { |
| 347 | $image = apply_filters('load_image_to_edit', $image, $attachment_id, $size); |
| 348 | if ( function_exists('imagealphablending') && function_exists('imagesavealpha') ) { |
| 349 | imagealphablending($image, false); |
| 350 | imagesavealpha($image, true); |
| 351 | } |
| 352 | } |
| 353 | return $image; |
| 354 | } |
| 355 | |
| 356 | /** |