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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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353 | $this->query_vars = apply_filters( 'request', $this->query_vars ); |
354 |
|
355 | /** |
356 | * Fires once all query variables for the current request have been parsed. |
357 | * |
358 | * @since 2.1.0 |
359 | * |
360 | * @param WP &$this Current WordPress environment instance (passed by reference). |
361 | */ |
362 | do_action_ref_array( 'parse_request', array( &$this ) ); |
363 | } |
364 |
|
365 | /** |
366 | * Sends additional HTTP headers for caching, content type, etc. |
367 | * |
368 | * Sets the Content-Type header. Sets the 'error' status (if passed) and optionally exits. |
369 | * If showing a feed, it will also send Last-Modified, ETag, and 304 status if needed. |
370 | * |
371 | * @since 2.0.0 |