PHP的mysqli_stmt_init()函数讲解

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<?php

// 假定数据库用户名：root，密码：123456，数据库：codingdict

$con=mysqli_connect("localhost","root","123456","codingdict");

if(mysqli_connect_errno($con))

{

echo"连接 MySQL 失败: ". mysqli_connect_error();

}

// 修改数据库连接字符集为 utf8

mysqli_set_charset($con,"utf8");

$country="CN";

// 创建预处理语句

$stmt=mysqli_stmt_init($con);

if(mysqli_stmt_prepare($stmt,"SELECT name FROM websites WHERE country=?"))

{

// 绑定参数

mysqli_stmt_bind_param($stmt,"s",$country);

// 执行查询

mysqli_stmt_execute($stmt);

// 绑定结果变量

mysqli_stmt_bind_result($stmt,$name);

// 获取值

mysqli_stmt_fetch($stmt);

printf("%s 国家的网站为：%s",$country,$name);

// 关闭预处理语句

mysqli_stmt_close($stmt);

}

mysqli_close($con);

?>