{"title": "php\u5e38\u7528\u7b14\u8bb0", "update_time": "2014-04-23 22:58:17", "tags": "\u5e38\u7528\u7b14\u8bb0 php", "pid": "284", "icon": "php.png"}
PHP保留两位小数 ``` round(10.123456, 2); ``` PHP检查php文件语法 ``` php -l php文件名 ``` PHP计算日期 ``` $dt1=date("Ymd"); #今天 $dt2=date("Ymd",strtotime('-1 days') ); #1天前 $dt3=date("Ymd",strtotime('-3 days') ); #3天前 ```