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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 |
---|---|
1808 | * |
1809 | * @param int $post_id Post ID. |
1810 | * @return array |
1811 | */ |
1812 | function get_pung($post_id) { |
1813 | global $wpdb; |
1814 | $pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id )); |
1815 | $pung = trim($pung); |
1816 | $pung = preg_split('/\s/', $pung); |
1817 | $pung = apply_filters('get_pung', $pung); |
1818 | return $pung; |
1819 | } |
1820 |
|
1821 | /** |
1822 | * Retrieve URLs that need to be pinged. |
1823 | * |
1824 | * @since 1.5.0 |
1825 | * @uses $wpdb |
1826 | * |