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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 |
|---|---|
| 250 | // Basic Query - see docs for more detail |
| 251 | |
| 252 | function query($query) { |
| 253 | if ( ! $this->ready ) |
| 254 | return false; |
| 255 | |
| 256 | // filter the query, if filters are available |
| 257 | // NOTE: some queries are made before the plugins have been loaded, and thus cannot be filtered with this method |
| 258 | if ( function_exists('apply_filters') ) |
| 259 | $query = apply_filters('query', $query); |
| 260 | |
| 261 | // initialise return |
| 262 | $return_val = 0; |
| 263 | $this->flush(); |
| 264 | |
| 265 | // Log how the function was called |
| 266 | $this->func_call = "\$db->query(\"$query\")"; |
| 267 | |
| 268 | // Keep track of the last query for debug.. |