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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 |
|---|---|
| 390 | } |
| 391 | } |
| 392 | |
| 393 | foreach( (array) $headers as $name => $field_value ) |
| 394 | @header("{$name}: {$field_value}"); |
| 395 | |
| 396 | if ( $exit_required ) |
| 397 | exit(); |
| 398 | |
| 399 | do_action_ref_array('send_headers', array(&$this)); |
| 400 | } |
| 401 | |
| 402 | /** |
| 403 | * Sets the query string property based off of the query variable property. |
| 404 | * |
| 405 | * The 'query_string' filter is deprecated, but still works. Plugins should |
| 406 | * use the 'request' filter instead. |
| 407 | * |
| 408 | * @since 2.0.0 |