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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 |
|---|---|
| 1254 | * @param array $title { |
| 1255 | * The document title parts. |
| 1256 | * |
| 1257 | * @type string $title Title of the viewed page. |
| 1258 | * @type string $page Optional. Page number if paginated. |
| 1259 | * @type string $tagline Optional. Site description when on home page. |
| 1260 | * @type string $site Optional. Site title when not on home page. |
| 1261 | * } |
| 1262 | */ |
| 1263 | $title = apply_filters( 'document_title_parts', $title ); |
| 1264 | |
| 1265 | $title = implode( " $sep ", array_filter( $title ) ); |
| 1266 | |
| 1267 | /** |
| 1268 | * Filters the document title. |
| 1269 | * |
| 1270 | * @since 5.8.0 |
| 1271 | * |
| 1272 | * @param string $title Document title. |