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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 |
---|---|
1051 | * @param string $query Database query |
1052 | * @return int|false Number of rows affected/selected or false on error |
1053 | */ |
1054 | function query( $query ) { |
1055 | if ( ! $this->ready ) |
1056 | return false; |
1057 |
|
1058 | // some queries are made before the plugins have been loaded, and thus cannot be filtered with this method |
1059 | if ( function_exists( 'apply_filters' ) ) |
1060 | $query = apply_filters( 'query', $query ); |
1061 |
|
1062 | $return_val = 0; |
1063 | $this->flush(); |
1064 |
|
1065 | // Log how the function was called |
1066 | $this->func_call = "\$db->query(\"$query\")"; |
1067 |
|
1068 | // Keep track of the last query for debug.. |
1069 | $this->last_query = $query; |