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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 |
|---|---|
| 1515 | |
| 1516 | /** |
| 1517 | * Filters the list of allowed hosts to redirect to. |
| 1518 | * |
| 1519 | * @since 2.3.0 |
| 1520 | * |
| 1521 | * @param string[] $hosts An array of allowed host names. |
| 1522 | * @param string $host The host name of the redirect destination; empty string if not set. |
| 1523 | */ |
| 1524 | $allowed_hosts = (array) apply_filters( 'allowed_redirect_hosts', array( $wpp['host'] ), isset( $lp['host'] ) ? $lp['host'] : '' ); |
| 1525 | |
| 1526 | if ( isset( $lp['host'] ) && ( ! in_array( $lp['host'], $allowed_hosts, true ) && strtolower( $wpp['host'] ) !== $lp['host'] ) ) { |
| 1527 | $location = $default; |
| 1528 | } |
| 1529 | |
| 1530 | return $location; |
| 1531 | } |
| 1532 | endif; |
| 1533 | |