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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.. |