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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 |
|---|---|
| 114 | * filters and actions that can be used to further manipulate the result. |
| 115 | * |
| 116 | * @since 2.0.0 |
| 117 | * |
| 118 | * @param array|string $extra_query_vars Set the extra query variables. |
| 119 | */ |
| 120 | function parse_request($extra_query_vars = '') { |
| 121 | global $wp_rewrite; |
| 122 | |
| 123 | if ( ! apply_filters( 'do_parse_request', true, $this, $extra_query_vars ) ) |
| 124 | return; |
| 125 | |
| 126 | $this->query_vars = array(); |
| 127 | $post_type_query_vars = array(); |
| 128 | |
| 129 | if ( is_array($extra_query_vars) ) |
| 130 | $this->extra_query_vars = & $extra_query_vars; |
| 131 | else if (! empty($extra_query_vars)) |
| 132 | parse_str($extra_query_vars, $this->extra_query_vars); |