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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 |
|---|---|
| 2674 | } |
| 2675 | } |
| 2676 | |
| 2677 | /* |
| 2678 | * Check if an image will be converted after uploading or some existing image sub-size file names may conflict |
| 2679 | * when regenerated. If yes, ensure the new file name will be unique and will produce unique sub-sizes. |
| 2680 | */ |
| 2681 | if ( $is_image ) { |
| 2682 | /** This filter is documented in wp-includes/class-wp-image-editor.php */ |
| 2683 | $output_formats = apply_filters( 'image_editor_output_format', array(), $_dir . $filename, $mime_type ); |
| 2684 | $alt_types = array(); |
| 2685 | |
| 2686 | if ( ! empty( $output_formats[ $mime_type ] ) ) { |
| 2687 | // The image will be converted to this format/mime type. |
| 2688 | $alt_mime_type = $output_formats[ $mime_type ]; |
| 2689 | |
| 2690 | // Other types of images whose names may conflict if their sub-sizes are regenerated. |
| 2691 | $alt_types = array_keys( array_intersect( $output_formats, array( $mime_type, $alt_mime_type ) ) ); |
| 2692 | $alt_types[] = $alt_mime_type; |