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@ 2014-03-25T18:14:11Z

<?php
		if(preg_match('/MSIE (.*?);/',
                      "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)"
                     ) 		
           ||	
           preg_match('/^(?=.*(Trident))(?=.*(rv:11.0)).*$/',
                      "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)"
                     ))	
		{
			$url = 'IE detected';
		} else {
			$url = 'not detected';
        }

echo $url;

Output
Performance
VLD
References
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preg_match: documentation ( source)

preferences:dark modelive preview

35.68 ms | 402 KiB | 5 Q