PHP mysqli_stmt close() 方法

 PHP MySQLi 函数

PHP mysqli_stmt::close() / mysqli_stmt_close() 函数用于关闭准备好的语句。它还释放语句句柄。如果当前语句有待处理或未读结果，该函数将取消它们，以便执行下一个查询。

语法

//面向对象风格
public mysqli_stmt::close()

//面向过程风格
mysqli_stmt_close(statement) 

参数

返回值

返回 true成功或失败时返回 false。

示例:面向对象风格

下面的示例显示了 mysqli_stmt::close() 方法的用法。

<?php
//建立与数据库的连接
$mysqli = new mysqli("localhost", "user", "password", "database");
if ($mysqli->connect_errno) {
  echo "Failed to connect to MySQL: ". $mysqli->connect_error;
  exit();
}

//创建准备好的语句
$stmt = $mysqli->stmt_init();
$query = "INSERT INTO Employee (Name, City, Salary) VALUES (?, ?, ?)";
$stmt->prepare($query);

//绑定参数
$stmt->bind_param('ssd', $name, $city, $salary);

//设置参数并执行
$name = "John";
$city = "London";
$salary = 2800;
$stmt->execute();

$name = "Marry";
$city = "Paris";
$salary = 2850;
$stmt->execute();

echo "Records inserted successfully.";

//结束语句
$stmt->close();

//关闭连接
$mysqli->close();
?> 

上述代码的输出将类似于:

Records inserted successfully. 

示例:面向过程风格

下面的示例显示了 的用法mysqli_stmt_close() 函数。

<?php
//建立与数据库的连接
$mysqli = mysqli_connect("localhost", "user", "password", "database");
if (mysqli_connect_errno()) {
  echo "Failed to connect to MySQL: ". mysqli_connect_error();
  exit();
}

//创建准备好的语句
$stmt = mysqli_stmt_init($mysqli);
$query = "INSERT INTO Employee (Name, City, Salary) VALUES (?, ?, ?)";
mysqli_stmt_prepare($stmt, $query);

//绑定参数
mysqli_stmt_bind_param($stmt, 'ssd', $name, $city, $salary);

//设置参数并执行
$name = "John";
$city = "London";
$salary = 2800;
mysqli_stmt_execute($stmt);

$name = "Marry";
$city = "Paris";
$salary = 2850;
mysqli_stmt_execute($stmt);

echo "Records inserted successfully.";

//结束语句
mysqli_stmt_close($stmt);

//关闭连接
mysqli_close($mysqli);
?> 

上述代码的输出将类似于:

Records inserted successfully.