php中的数据库连接错误

Question

Nobody answered so deleting this post

Answer 1

You can use any one either mysql or mysqli. above your code you did both in single file. Recommended one mysqli herei.

<?php
$con = mysqli_connect("localhost","my_user","my_password","my_db");

// Check connection
if (mysqli_connect_errno())
  {
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
  }
?>