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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 |
|---|---|
| 583 | * @return unknown |
| 584 | */ |
| 585 | function query($query) { |
| 586 | if ( ! $this->ready ) |
| 587 | return false; |
| 588 | |
| 589 | // filter the query, if filters are available |
| 590 | // NOTE: some queries are made before the plugins have been loaded, and thus cannot be filtered with this method |
| 591 | if ( function_exists('apply_filters') ) |
| 592 | $query = apply_filters('query', $query); |
| 593 | |
| 594 | // initialise return |
| 595 | $return_val = 0; |
| 596 | $this->flush(); |
| 597 | |
| 598 | // Log how the function was called |
| 599 | $this->func_call = "\$db->query(\"$query\")"; |
| 600 | |
| 601 | // Keep track of the last query for debug.. |