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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 |
|---|---|
| 115 | $sizes[$s]['height'] = intval( $_wp_additional_image_sizes[$s]['height'] ); // For theme-added sizes |
| 116 | else |
| 117 | $sizes[$s]['height'] = get_option( "{$s}_size_h" ); // For default sizes set in options |
| 118 | if ( isset( $_wp_additional_image_sizes[$s]['crop'] ) ) |
| 119 | $sizes[$s]['crop'] = intval( $_wp_additional_image_sizes[$s]['crop'] ); // For theme-added sizes |
| 120 | else |
| 121 | $sizes[$s]['crop'] = get_option( "{$s}_crop" ); // For default sizes set in options |
| 122 | } |
| 123 | |
| 124 | $sizes = apply_filters( 'intermediate_image_sizes_advanced', $sizes ); |
| 125 | |
| 126 | foreach ($sizes as $size => $size_data ) { |
| 127 | $resized = image_make_intermediate_size( $file, $size_data['width'], $size_data['height'], $size_data['crop'] ); |
| 128 | if ( $resized ) |
| 129 | $metadata['sizes'][$size] = $resized; |
| 130 | } |
| 131 | |
| 132 | // fetch additional metadata from exif/iptc |
| 133 | $image_meta = wp_read_image_metadata( $file ); |