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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 |
|---|---|
| 3712 | $new = implode("\n", $pung); |
| 3713 | |
| 3714 | /** |
| 3715 | * Filter the new ping URL to add for the given post. |
| 3716 | * |
| 3717 | * @since 2.0.0 |
| 3718 | * |
| 3719 | * @param string $new New ping URL to add. |
| 3720 | */ |
| 3721 | $new = apply_filters( 'add_ping', $new ); |
| 3722 | |
| 3723 | // expected_slashed ($new) |
| 3724 | $new = wp_unslash($new); |
| 3725 | return $wpdb->update( $wpdb->posts, array( 'pinged' => $new ), array( 'ID' => $post_id ) ); |
| 3726 | } |
| 3727 | |
| 3728 | /** |
| 3729 | * Retrieve enclosures already enclosed for a post. |
| 3730 | * |