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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 |
---|---|
1405 | * Filters the admin referrer policy header value. |
1406 | * |
1407 | * @since 4.9.0 |
1408 | * @since 4.9.5 The default value was changed to 'strict-origin-when-cross-origin'. |
1409 | * |
1410 | * @link https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policy |
1411 | * |
1412 | * @param string $policy The admin referrer policy header value. Default 'strict-origin-when-cross-origin'. |
1413 | */ |
1414 | $policy = apply_filters( 'admin_referrer_policy', $policy ); |
1415 |
|
1416 | header( sprintf( 'Referrer-Policy: %s', $policy ) ); |
1417 | } |
1418 |
|
1419 | /** |
1420 | * Outputs JS that reloads the page if the user navigated to it with the Back or Forward button. |
1421 | * |
1422 | * Used on the Edit Post and Add New Post screens. Needed to ensure the page is not loaded from browser cache, |
1423 | * so the post title and editor content are the last saved versions. Ideally this script should run first in the head. |