PHP 中的 mysqli connect函数

mysqli connect - 语法

mysqli_connect(host,username,password,dbname,port,socket);

它打开与MySQL Server的连接。

mysqli connect - 返回值

它返回一个表示与MySQL服务器的连接的对象

mysqli connect - 示例

<?php
   $connection=mysqli_connect("localhost","user_name","password","db_name");
   
   if (mysqli_connect_errno()) {
      echo "Failed to connect to MySQL: " . mysqli_connect_error();
   }
?>