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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 |
---|---|
1852 | * of the default playlist output, returning the passed value instead. |
1853 | * |
1854 | * @since 3.9.0 |
1855 | * @since 4.2.0 The `$instance` parameter was added. |
1856 | * |
1857 | * @param string $output Playlist output. Default empty. |
1858 | * @param array $attr An array of shortcode attributes. |
1859 | * @param int $instance Unique numeric ID of this playlist shortcode instance. |
1860 | */ |
1861 | $output = apply_filters( 'post_playlist', '', $attr, $instance ); |
1862 | if ( $output != '' ) { |
1863 | return $output; |
1864 | } |
1865 |
|
1866 | $atts = shortcode_atts( array( |
1867 | 'type' => 'audio', |
1868 | 'order' => 'ASC', |
1869 | 'orderby' => 'menu_order ID', |
1870 | 'id' => $post ? $post->ID : 0, |