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@ 2014-05-26T00:16:47Z

<?php
$regex = '/(((?!a).)*)*a\\{/';
$test_string = 'AAAAAAAAAAAAAA{AA';
echo "1:".preg_replace($regex,'WORKED',$test_string)."\n";
echo "1:".preg_replace($regex.'u','WORKED',$test_string)."\n";
echo "2:".mb_ereg_replace($regex,'WORKED',$test_string);

Output
Performance
VLD
References
Branches

preg_replace: documentation ( source)
mb_ereg_replace: documentation ( source)

preferences:dark modelive preview

34.65 ms | 402 KiB | 5 Q