php 创建数据库

mysqli

<?php
$servername = "localhost";
$username = "root";
$password = "123456";
$dbname = "test";
 
// 创建连接
$conn = new mysqli($servername, $username, $password);
// 检测连接
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
} 
 
// 创建数据库
$sql = "CREATE DATABASE IF NOT EXISTS ".$dbname." DEFAULT CHARSET utf8 COLLATE utf8_general_ci;";
if ($conn->query($sql) === TRUE) {
    echo "数据库创建成功";
} else {
    echo "Error creating database: " . $conn->error;
}

pdo

$servername = "localhost"; 
$username = "root"; 
$password = "123456";
$dbname = "test";

try { 
    $conn = new PDO("mysql:host=$servername", $username, $password); 

    // 设置 PDO 错误模式为异常 
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); 
    $sql = "CREATE DATABASE IF NOT EXISTS ".$dbname." DEFAULT CHARSET utf8 COLLATE utf8_general_ci;";

    // 使用 exec() ，因为没有结果返回 
    $conn->exec($sql); 

    echo "数据库创建成功<br>"; 
} 
catch(PDOException $e) 
{ 
    echo $sql . "<br>" . $e->getMessage(); 
} 

$conn = null;