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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 |
|---|---|
| 1362 | |
| 1363 | /** |
| 1364 | * Filters the whitelist of hosts to redirect to. |
| 1365 | * |
| 1366 | * @since 2.3.0 |
| 1367 | * |
| 1368 | * @param array $hosts An array of allowed hosts. |
| 1369 | * @param bool|string $host The parsed host; empty if not isset. |
| 1370 | */ |
| 1371 | $allowed_hosts = (array) apply_filters( 'allowed_redirect_hosts', array($wpp['host']), isset($lp['host']) ? $lp['host'] : '' ); |
| 1372 | |
| 1373 | if ( isset($lp['host']) && ( !in_array($lp['host'], $allowed_hosts) && $lp['host'] != strtolower($wpp['host'])) ) |
| 1374 | $location = $default; |
| 1375 | |
| 1376 | return $location; |
| 1377 | } |
| 1378 | endif; |
| 1379 | |
| 1380 | if ( ! function_exists('wp_notify_postauthor') ) : |