PHP学习笔记
strpos($str1,$str2[$offset]);str1中搜索str2,返回第一次出现的位置,头是0;echo `ipconfig`;等效于echo shell_exec('ipconfig');
echo @(3/0);
&&,||,短路优先级最高
echo date("Y年m月d日 H:i:s");
echo date("Y-m-d H:i:s");
echo date("Y/m/d H:i:s",time())
echo date("Y/m/d H:i:s",time()+24*3600)
echo date('w');
date_default_timezone_get();得到当前的默认时区
date_default_timezone_set();设置时区/PRC Asia/Shanghai
echo ini_get('date.timezone'); ini_set('date.timezone','PRC')
wKiom1X4K9rSQqGQAAGVpFw1orQ188.jpg
isset($var)是否设置;empty($var)是否为空;可套在var_dump();内
exit; die('Game Over!');终止执行

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