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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 |
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2138 | * @return int How many rows were updated. |
2139 | */ |
2140 | function add_ping($post_id, $uri) { |
2141 | global $wpdb; |
2142 | $pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id )); |
2143 | $pung = trim($pung); |
2144 | $pung = preg_split('/\s/', $pung); |
2145 | $pung[] = $uri; |
2146 | $new = implode("\n", $pung); |
2147 | $new = apply_filters('add_ping', $new); |
2148 | // expected_slashed ($new) |
2149 | $new = stripslashes($new); |
2150 | return $wpdb->update( $wpdb->posts, array( 'pinged' => $new ), array( 'ID' => $post_id ) ); |
2151 | } |
2152 |
|
2153 | /** |
2154 | * Retrieve enclosures already enclosed for a post. |
2155 | * |
2156 | * @since 1.5.0 |