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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 |
---|---|
928 | * |
929 | * Allows for the addition and/or removal of potential enclosures to save |
930 | * to postmeta before checking the database for existing enclosures. |
931 | * |
932 | * @since 4.4.0 |
933 | * |
934 | * @param string[] $post_links An array of enclosure links. |
935 | * @param int $post_ID Post ID. |
936 | */ |
937 | $post_links = apply_filters( 'enclosure_links', $post_links, $post->ID ); |
938 |
|
939 | foreach ( (array) $post_links as $url ) { |
940 | $url = strip_fragment_from_url( $url ); |
941 |
|
942 | if ( '' !== $url && ! $wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = 'enclosure' AND meta_value LIKE %s", $post->ID, $wpdb->esc_like( $url ) . '%' ) ) ) { |
943 |
|
944 | $headers = wp_get_http_headers( $url ); |
945 | if ( $headers ) { |
946 | $len = isset( $headers['content-length'] ) ? (int) $headers['content-length'] : 0; |