Php知识点

1，PDO连接数据库常语句

  $dsn = "mysql:host=xxx.xxx.xxx.xxx:port;dbname=xxx;charset=utf8";
  $pdo = new PDO($dsn,$username,$pass) or die("connect failed");

  注:charset只能用utf8（大小写都行）形式，不能写成utf-8

2，遍历数组

  $array = array("1","2","3");
  foreach($array as $key => $value){
        echo $key." ".$value;
   }