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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 |
|---|---|
| 1209 | /** |
| 1210 | * Filters the text of the page title. |
| 1211 | * |
| 1212 | * @since 2.0.0 |
| 1213 | * |
| 1214 | * @param string $title Page title. |
| 1215 | * @param string $sep Title separator. |
| 1216 | * @param string $seplocation Location of the separator (left or right). |
| 1217 | */ |
| 1218 | $title = apply_filters( 'wp_title', $title, $sep, $seplocation ); |
| 1219 | |
| 1220 | // Send it out |
| 1221 | if ( $display ) { |
| 1222 | echo $title; |
| 1223 | } else { |
| 1224 | return $title; |
| 1225 | } |
| 1226 | } |
| 1227 | |