$time=set_time_limit(1);				//以下所有语句1秒钟执行完
echo $time."\n";
do{ 								//此循环能在1秒钟完成吗?出错退出
echo $i;
$time=set_time_limit(0);				//重新调整设定值
echo $time."\n";

在 php.ini 中的 max_execution_time 变数设定为 0 则不限定最久时间。Set_time_limit函数用来设定该页最久执行时间,若设定值是 30 秒,当执行到该函数时,才开始计算。例如,若内定是30 秒,而在执行到该函数前已执行了 25 秒,而用本函式改为 20 秒,则该页面最长执行时间为 45 秒。


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