1. Description: 在利用php写后台服务器,在利用函数mysql_connect函数连接MySQL的时候没有得到任何返回值,后来根据资料又尝试函数mysql_pconnect和mysqli_connect仍旧没有。
2. Reasons: 混淆了php 版本,对于php5使用mysql_connect连接MySQL,而我的是php7,连接过程应该如下:
<?php
$servername = "localhost";
$username = "username";
$password = "password";
$db = "testDB";
// Create connection
$conn = new mysqli($servername, $username, $password, $db);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully";
?>
3. Tips:
1,如何确定PHP版本: php --version
4. Reference:
https://www.w3schools.com/php7/php7_mysql_connect.asp