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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 |
|---|---|
| 206 | $this->query_vars = wp_parse_args( $query, $this->query_var_defaults ); |
| 207 | |
| 208 | /** |
| 209 | * Fires after the site query vars have been parsed. |
| 210 | * |
| 211 | * @since 4.6.0 |
| 212 | * |
| 213 | * @param WP_Site_Query &$this The WP_Site_Query instance (passed by reference). |
| 214 | */ |
| 215 | do_action_ref_array( 'parse_site_query', array( &$this ) ); |
| 216 | } |
| 217 | |
| 218 | /** |
| 219 | * Sets up the WordPress query for retrieving sites. |
| 220 | * |
| 221 | * @since 4.6.0 |
| 222 | * @access public |
| 223 | * |
| 224 | * @param string|array $query Array or URL query string of parameters. |