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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 |
---|---|
3921 | $new = implode("\n", $pung); |
3922 |
|
3923 | /** |
3924 | * Filters the new ping URL to add for the given post. |
3925 | * |
3926 | * @since 2.0.0 |
3927 | * |
3928 | * @param string $new New ping URL to add. |
3929 | */ |
3930 | $new = apply_filters( 'add_ping', $new ); |
3931 |
|
3932 | // expected_slashed ($new). |
3933 | $new = wp_unslash($new); |
3934 | return $wpdb->update( $wpdb->posts, array( 'pinged' => $new ), array( 'ID' => $post_id ) ); |
3935 | } |
3936 |
|
3937 | /** |
3938 | * Retrieve enclosures already enclosed for a post. |
3939 | * |