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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 |
|---|---|
| 856 | /** |
| 857 | * Filter the text of the page title. |
| 858 | * |
| 859 | * @since 2.0.0 |
| 860 | * |
| 861 | * @param string $title Page title. |
| 862 | * @param string $sep Title separator. |
| 863 | * @param string $seplocation Location of the separator (left or right). |
| 864 | */ |
| 865 | $title = apply_filters( 'wp_title', $title, $sep, $seplocation ); |
| 866 | |
| 867 | // Send it out |
| 868 | if ( $display ) |
| 869 | echo $title; |
| 870 | else |
| 871 | return $title; |
| 872 | |
| 873 | } |
| 874 | |