用函数： date() 一般形式：date('Y-m-d H:i:s', unix时间)

 $date_unix=time();//获取当前时间，unix时间戳

 echo 'Unix时间：'.$date_unix;

 echo '<br>';

 $date=date("Y/m/d",$date_unix);//将unix时间戳转化为指定的日期格式

 echo '日期格式：'.$date;

效果：

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