3v4l.org

run code in 300+ PHP versions simultaneously
<?php $salt = microtime(); echo $salt . ' '; $generated_token = MD5('$salt' . rand(1, 100)); //echo $generated_token. '<br>'; for($token=1;$token<10;++$token){ if($generated_token == $token) echo 'true'; else echo 'false'; } ?>

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