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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 |
|---|---|
| 123 | /** |
| 124 | * Filter whether to parse the request. |
| 125 | * |
| 126 | * @since 3.5.0 |
| 127 | * |
| 128 | * @param bool $bool Whether or not to parse the request. Default true. |
| 129 | * @param WP $this Current WordPress environment instance. |
| 130 | * @param array|string $extra_query_vars Extra passed query variables. |
| 131 | */ |
| 132 | if ( ! apply_filters( 'do_parse_request', true, $this, $extra_query_vars ) ) |
| 133 | return; |
| 134 | |
| 135 | $this->query_vars = array(); |
| 136 | $post_type_query_vars = array(); |
| 137 | |
| 138 | if ( is_array( $extra_query_vars ) ) { |
| 139 | $this->extra_query_vars = & $extra_query_vars; |
| 140 | } elseif ( ! empty( $extra_query_vars ) ) { |
| 141 | parse_str( $extra_query_vars, $this->extra_query_vars ); |