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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 |
|---|---|
| 1393 | /** |
| 1394 | * Filters the text of the page title. |
| 1395 | * |
| 1396 | * @since 2.0.0 |
| 1397 | * |
| 1398 | * @param string $title Page title. |
| 1399 | * @param string $sep Title separator. |
| 1400 | * @param string $seplocation Location of the separator ('left' or 'right'). |
| 1401 | */ |
| 1402 | $title = apply_filters( 'wp_title', $title, $sep, $seplocation ); |
| 1403 | |
| 1404 | // Send it out. |
| 1405 | if ( $display ) { |
| 1406 | echo $title; |
| 1407 | } else { |
| 1408 | return $title; |
| 1409 | } |
| 1410 | } |
| 1411 | |