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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 |
|---|---|
| 100 | if ( 0 === strpos($file, $uploads['basedir']) ) {// Check that the upload base exists in the file path |
| 101 | $file = str_replace($uploads['basedir'], '', $file); // Remove upload dir from the file path |
| 102 | $file = ltrim($file, '/'); |
| 103 | } |
| 104 | } |
| 105 | $metadata['file'] = $file; |
| 106 | |
| 107 | // make thumbnails and other intermediate sizes |
| 108 | $sizes = array('thumbnail', 'medium', 'large'); |
| 109 | $sizes = apply_filters('intermediate_image_sizes', $sizes); |
| 110 | |
| 111 | foreach ($sizes as $size) { |
| 112 | $resized = image_make_intermediate_size( $full_path_file, get_option("{$size}_size_w"), get_option("{$size}_size_h"), get_option("{$size}_crop") ); |
| 113 | if ( $resized ) |
| 114 | $metadata['sizes'][$size] = $resized; |
| 115 | } |
| 116 | |
| 117 | // fetch additional metadata from exif/iptc |
| 118 | $image_meta = wp_read_image_metadata( $full_path_file ); |