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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 |
|---|---|
| 397 | /** |
| 398 | * Filters the list of response headers that are exposed to REST API CORS requests. |
| 399 | * |
| 400 | * @since 5.5.0 |
| 401 | * @since 6.3.0 The `$request` parameter was added. |
| 402 | * |
| 403 | * @param string[] $expose_headers The list of response headers to expose. |
| 404 | * @param WP_REST_Request $request The request in context. |
| 405 | */ |
| 406 | $expose_headers = apply_filters( 'rest_exposed_cors_headers', $expose_headers, $request ); |
| 407 | |
| 408 | $this->send_header( 'Access-Control-Expose-Headers', implode( ', ', $expose_headers ) ); |
| 409 | |
| 410 | $allow_headers = array( |
| 411 | 'Authorization', |
| 412 | 'X-WP-Nonce', |
| 413 | 'Content-Disposition', |
| 414 | 'Content-MD5', |
| 415 | 'Content-Type', |