在Debian上,PHP可以通过多种方式与数据库连接。以下是一些常见的数据库及其对应的PHP扩展和连接方法:
<?php
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";
// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);
// 检查连接
if ($conn->connect_error) {
die("连接失败: " . $conn->connect_error);
}
echo "连接成功";
?>
<?php
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";
try {
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
// 设置 PDO 错误模式为异常
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
echo "连接成功";
} catch(PDOException $e) {
echo "连接失败: " . $e->getMessage();
}
?>
<?php
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";
// 创建连接
$conn = pg_connect("host=$servername dbname=$dbname user=$username password=$password");
// 检查连接
if (!$conn) {
die("连接失败: " . pg_last_error());
}
echo "连接成功";
?>
<?php
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";
try {
$conn = new PDO("pgsql:host=$servername;dbname=$dbname", $username, $password);
// 设置 PDO 错误模式为异常
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
echo "连接成功";
} catch(PDOException $e) {
echo "连接失败: " . $e->getMessage();
}
?>
<?php
$dbname = "your_database.db";
// 创建连接
$conn = new SQLite3($dbname);
// 检查连接
if (!$conn) {
die("连接失败: " . $conn->lastErrorMsg());
}
echo "连接成功";
?>
在Debian上,你可以使用apt
包管理器来安装PHP扩展。例如,安装MySQLi扩展:
sudo apt update
sudo apt install php-mysql
安装PDO扩展:
sudo apt install php-pdo
安装PostgreSQL扩展:
sudo apt install php-pgsql
安装SQLite3扩展:
sudo apt install php-sqlite3
安装完成后,重启你的Web服务器(如Apache或Nginx)以使更改生效:
sudo systemctl restart apache2 # 对于Apache
sudo systemctl restart nginx # 对于Nginx
通过以上步骤,你可以在Debian上使用PHP连接到不同的数据库。