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@ 2013-08-24T00:54:28Z

<?php
	if (php_uname("s")!="Linux"||!function_exists("exec")) result('error', '很抱歉，系统不支持！');

?>

Output
Performance
VLD
References
Branches

function_exists: documentation ( source)
php_uname: documentation ( source)

preferences:dark modelive preview

45.05 ms | 402 KiB | 5 Q