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@ 2014-09-17T10:39:22Z

<?php

$QUERYSTRING = "test.ai";

if( (substr(strtolower($QUERYSTRING), -3) != ".ai") && (substr(strtolower($QUERYSTRING), -4) != ".eps")) {
	echo "not allowed";
} else {
	echo "allowed";
}

Output
Performance
VLD
References
Branches

substr: documentation ( source)
strtolower: documentation ( source)

preferences:dark modelive preview

36.97 ms | 402 KiB | 5 Q