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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 |
|---|---|
| 424 | $msg = ''; |
| 425 | |
| 426 | if ( !is_array($backup_sizes) ) { |
| 427 | $msg->error = __('Cannot load image metadata.'); |
| 428 | return $msg; |
| 429 | } |
| 430 | |
| 431 | $parts = pathinfo($file); |
| 432 | $suffix = time() . rand(100, 999); |
| 433 | $default_sizes = apply_filters( 'intermediate_image_sizes', array('large', 'medium', 'thumbnail') ); |
| 434 | |
| 435 | if ( isset($backup_sizes['full-orig']) && is_array($backup_sizes['full-orig']) ) { |
| 436 | $data = $backup_sizes['full-orig']; |
| 437 | |
| 438 | if ( $parts['basename'] != $data['file'] ) { |
| 439 | if ( defined('IMAGE_EDIT_OVERWRITE') && IMAGE_EDIT_OVERWRITE ) { |
| 440 | // delete only if it's edited image |
| 441 | if ( preg_match('/-e[0-9]{13}\./', $parts['basename']) ) { |
| 442 | $delpath = apply_filters('wp_delete_file', $file); |
| Line | Code |
| 596 | |
| 597 | $meta['file'] = _wp_relative_upload_path($new_path); |
| 598 | $meta['width'] = imagesx($img); |
| 599 | $meta['height'] = imagesy($img); |
| 600 | |
| 601 | list ( $uwidth, $uheight ) = wp_constrain_dimensions($meta['width'], $meta['height'], 128, 96); |
| 602 | $meta['hwstring_small'] = "height='$uheight' width='$uwidth'"; |
| 603 | |
| 604 | if ( $success && ('nothumb' == $target || 'all' == $target) ) { |
| 605 | $sizes = apply_filters( 'intermediate_image_sizes', array('large', 'medium', 'thumbnail') ); |
| 606 | if ( 'nothumb' == $target ) |
| 607 | $sizes = array_diff( $sizes, array('thumbnail') ); |
| 608 | } |
| 609 | |
| 610 | $return->fw = $meta['width']; |
| 611 | $return->fh = $meta['height']; |
| 612 | } elseif ( 'thumbnail' == $target ) { |
| 613 | $sizes = array( 'thumbnail' ); |
| 614 | $success = $delete = $nocrop = true; |