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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 |
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324 | $expose_headers = array( 'X-WP-Total', 'X-WP-TotalPages', 'Link' ); |
325 |
|
326 | /** |
327 | * Filters the list of response headers that are exposed to REST API CORS requests. |
328 | * |
329 | * @since 5.5.0 |
330 | * |
331 | * @param string[] $expose_headers The list of response headers to expose. |
332 | */ |
333 | $expose_headers = apply_filters( 'rest_exposed_cors_headers', $expose_headers ); |
334 |
|
335 | $this->send_header( 'Access-Control-Expose-Headers', implode( ', ', $expose_headers ) ); |
336 |
|
337 | $allow_headers = array( |
338 | 'Authorization', |
339 | 'X-WP-Nonce', |
340 | 'Content-Disposition', |
341 | 'Content-MD5', |
342 | 'Content-Type', |