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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 |
|---|---|
| 874 | /** |
| 875 | * Filter the text of the page title. |
| 876 | * |
| 877 | * @since 2.0.0 |
| 878 | * |
| 879 | * @param string $title Page title. |
| 880 | * @param string $sep Title separator. |
| 881 | * @param string $seplocation Location of the separator (left or right). |
| 882 | */ |
| 883 | $title = apply_filters( 'wp_title', $title, $sep, $seplocation ); |
| 884 | |
| 885 | // Send it out |
| 886 | if ( $display ) |
| 887 | echo $title; |
| 888 | else |
| 889 | return $title; |
| 890 | |
| 891 | } |
| 892 | |