Better method than stristr

[Steven Osborn <steven.osborn@xxxxxxxxxx>]

		Can someone please advise a faster solution to do what I'm doing  
below?  All I need to be able to do is determine if any of the  
strings in the array are contained in $q.  The method I have works,  
but I'm sure its not the most efficient way to do it.

		$dirtyWord = array("UNION","LOAD_FILE","LOAD DATA INFILE","LOAD  
FILE","BENCHMARK","INTO OUTFILE");
		foreach($dirtyWord as $injection)
		{
			if(stristr($q,$injection))
			{
				//Do Something to remove injection and log it
			}
		}

		
Thank you.
--Steven