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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 |
---|---|
136 | /** |
137 | * Filters whether to parse the request. |
138 | * |
139 | * @since 3.5.0 |
140 | * |
141 | * @param bool $bool Whether or not to parse the request. Default true. |
142 | * @param WP $wp Current WordPress environment instance. |
143 | * @param array|string $extra_query_vars Extra passed query variables. |
144 | */ |
145 | if ( ! apply_filters( 'do_parse_request', true, $this, $extra_query_vars ) ) { |
146 | return; |
147 | } |
148 |
|
149 | $this->query_vars = array(); |
150 | $post_type_query_vars = array(); |
151 |
|
152 | if ( is_array( $extra_query_vars ) ) { |
153 | $this->extra_query_vars = & $extra_query_vars; |
154 | } elseif ( ! empty( $extra_query_vars ) ) { |