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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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290 |
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291 | foreach ( (array) $this->private_query_vars as $var) { |
292 | if ( isset($this->extra_query_vars[$var]) ) |
293 | $this->query_vars[$var] = $this->extra_query_vars[$var]; |
294 | } |
295 |
|
296 | if ( isset($error) ) |
297 | $this->query_vars['error'] = $error; |
298 |
|
299 | $this->query_vars = apply_filters('request', $this->query_vars); |
300 |
|
301 | do_action_ref_array('parse_request', array(&$this)); |
302 | } |
303 |
|
304 | /** |
305 | * Send additional HTTP headers for caching, content type, etc. |
306 | * |
307 | * Sets the X-Pingback header, 404 status (if 404), Content-type. If showing |
308 | * a feed, it will also send last-modified, etag, and 304 status if needed. |