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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 |
|---|---|
| 399 | |
| 400 | /** |
| 401 | * Filters the network query clauses. |
| 402 | * |
| 403 | * @since 4.6.0 |
| 404 | * |
| 405 | * @param string[] $pieces An associative array of network query clauses. |
| 406 | * @param WP_Network_Query $this Current instance of WP_Network_Query (passed by reference). |
| 407 | */ |
| 408 | $clauses = apply_filters_ref_array( 'networks_clauses', array( compact( $pieces ), &$this ) ); |
| 409 | |
| 410 | $fields = isset( $clauses['fields'] ) ? $clauses['fields'] : ''; |
| 411 | $join = isset( $clauses['join'] ) ? $clauses['join'] : ''; |
| 412 | $where = isset( $clauses['where'] ) ? $clauses['where'] : ''; |
| 413 | $orderby = isset( $clauses['orderby'] ) ? $clauses['orderby'] : ''; |
| 414 | $limits = isset( $clauses['limits'] ) ? $clauses['limits'] : ''; |
| 415 | $groupby = isset( $clauses['groupby'] ) ? $clauses['groupby'] : ''; |
| 416 | |
| 417 | if ( $where ) { |