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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 |
---|---|
2182 |
|
2183 | if ( !empty($search) ) { |
2184 | $search = " AND ({$search}) "; |
2185 | if ( !is_user_logged_in() ) |
2186 | $search .= " AND ($wpdb->posts.post_password = '') "; |
2187 | } |
2188 | } |
2189 |
|
2190 | // Allow plugins to contextually add/remove/modify the search section of the database query |
2191 | $search = apply_filters_ref_array('posts_search', array( $search, &$this ) ); |
2192 |
|
2193 | // Taxonomies |
2194 | if ( !$this->is_singular ) { |
2195 | $this->parse_tax_query( $q ); |
2196 |
|
2197 | $clauses = $this->tax_query->get_sql( $wpdb->posts, 'ID' ); |
2198 |
|
2199 | $join .= $clauses['join']; |
2200 | $where .= $clauses['where']; |