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run code in 300+ PHP versions simultaneously
<? echo "-"; if(preg_match('[0-9a-zA-Z]', 'bob')) { echo preg_match('[0-9a-zA-Z]', 'bob'); } echo "-"; if(preg_match('~[0-9a-zA-Z]~', 'bob')) { echo preg_match('[0-9a-zA-Z]', 'bob'); } echo "-"; if(preg_match('~[0-9a-zA-Z]+~', 'bob')) { echo preg_match('[0-9a-zA-Z]', 'bob'); } ?>

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