php批量删除和单个删除源码

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// 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);
}

// 删除单条记录
$id = 1; // 假设要删除的记录ID为1
$sql = "DELETE FROM myTable WHERE id = $id";
if ($conn->query($sql) === TRUE) {
    echo "记录删除成功";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

$conn->close();
?>

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// 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);
}

// 批量删除记录
$ids = array(1, 2, 3); // 假设要删除的记录ID为1, 2, 3
$sql = "DELETE FROM myTable WHERE id IN (" . implode(',', $ids) . ")";
if ($conn->query($sql) === TRUE) {
    echo "记录删除成功";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

$conn->close();
?>

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// 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);
}

// 使用预处理语句删除单条记录
$id = 1; // 假设要删除的记录ID为1
$stmt = $conn->prepare("DELETE FROM myTable WHERE id = ?");
$stmt->bind_param("i", $id);
if ($stmt->execute() === TRUE) {
    echo "记录删除成功";
} else {
    echo "Error: " . $stmt->error;
}

$stmt->close();
$conn->close();
?>

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// 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);
}

// 批量删除记录，分批次进行
$ids = array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10); // 假设要删除的记录ID列表
$batchSize = 5; // 每批次删除的记录数
for ($i = 0; $i < count($ids); $i += $batchSize) {
    $subIds = array_slice($ids, $i, $batchSize);
    $sql = "DELETE FROM myTable WHERE id IN (" . implode(',', $subIds) . ")";
    if ($conn->query($sql) !== TRUE) {
        echo "Error: " . $sql . "<br>" . $conn->error;
        break;
    }
}

echo "记录删除成功";
$conn->close();
?>