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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 |
|---|---|
| 1240 | $title = implode( " $sep ", array_filter( $title ) ); |
| 1241 | |
| 1242 | /** |
| 1243 | * Filters the document title. |
| 1244 | * |
| 1245 | * @since 5.8.0 |
| 1246 | * |
| 1247 | * @param string $title Document title. |
| 1248 | */ |
| 1249 | $title = apply_filters( 'document_title', $title ); |
| 1250 | |
| 1251 | return $title; |
| 1252 | } |
| 1253 | |
| 1254 | /** |
| 1255 | * Displays title tag with content. |
| 1256 | * |
| 1257 | * @ignore |
| 1258 | * @since 4.1.0 |