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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 |
|---|---|
| 3921 | require_once ABSPATH . WPINC . '/class-wp-image-editor-imagick.php'; |
| 3922 | /** |
| 3923 | * Filters the list of image editing library classes. |
| 3924 | * |
| 3925 | * @since 3.5.0 |
| 3926 | * |
| 3927 | * @param string[] $image_editors Array of available image editor class names. Defaults are |
| 3928 | * 'WP_Image_Editor_Imagick', 'WP_Image_Editor_GD'. |
| 3929 | */ |
| 3930 | $implementations = apply_filters( 'wp_image_editors', array( 'WP_Image_Editor_Imagick', 'WP_Image_Editor_GD' ) ); |
| 3931 | $supports_input = false; |
| 3932 | |
| 3933 | foreach ( $implementations as $implementation ) { |
| 3934 | if ( ! call_user_func( array( $implementation, 'test' ), $args ) ) { |
| 3935 | continue; |
| 3936 | } |
| 3937 | |
| 3938 | // Implementation should support the passed mime type. |
| 3939 | if ( isset( $args['mime_type'] ) && |