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PHP MySQLi连接

2024-04-14 05:21:03 343

示例

面向对象的风格

连接到服务器

$conn = new mysqli("localhost","my_user","my_password");

设置默认数据库：$conn->select_db("my_db");

连接到数据库

$conn = new mysqli("localhost","my_user","my_password","my_db");

程序风格

连接到服务器

$conn = mysqli_connect("localhost","my_user","my_password");

设置默认数据库：mysqli_select_db($conn,"my_db");

连接到数据库

$conn = mysqli_connect("localhost","my_user","my_password","my_db");

验证数据库连接

面向对象的风格

if ($conn->connect_errno > 0) {
    trigger_error($db->connect_error);
} //否则：成功连接

程序风格

if (!$conn) {
   trigger_error(mysqli_connect_error());
} //否则：成功连接