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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 |
|---|---|
| 936 | * the default gallery template. |
| 937 | * |
| 938 | * @since 2.5.0 |
| 939 | * |
| 940 | * @see gallery_shortcode() |
| 941 | * |
| 942 | * @param string $output The gallery output. Default empty. |
| 943 | * @param array $attr Attributes of the gallery shortcode. |
| 944 | */ |
| 945 | $output = apply_filters( 'post_gallery', '', $attr ); |
| 946 | if ( $output != '' ) { |
| 947 | return $output; |
| 948 | } |
| 949 | |
| 950 | $html5 = current_theme_supports( 'html5', 'gallery' ); |
| 951 | $atts = shortcode_atts( array( |
| 952 | 'order' => 'ASC', |
| 953 | 'orderby' => 'menu_order ID', |
| 954 | 'id' => $post ? $post->ID : 0, |