connect_error) {    die("连接失败: " . $conn->connect_error);}//编写删除数据的SQL语句$sql = "DELETE FROM myTable WHERE id=1";//执行SQL语句if ($conn->query($sql) === TRUE) {    echo "数据删除成功";} else {    echo "删除失败: " . $conn->error;}//关闭连接$conn->close();?>

connect_error) {    die("连接失败: " . $conn->connect_error);}//获取用户输入的数据$id = $_POST["id"];//使用mysql_real_escape_string()函数转义用户输入的数据$id = mysql_real_escape_string($id);//编写删除数据的SQL语句$sql = "DELETE FROM myTable WHERE id="$id"";//执行SQL语句if ($conn->query($sql) === TRUE) {    echo "数据删除成功";} else {    echo "删除失败: " . $conn->error;}//关闭连接$conn->close();?>

connect_error) {    die("连接失败: " . $conn->connect_error);}//开启事务$conn->begin_transaction();//编写删除数据的SQL语句$sql1 = "DELETE FROM myTable WHERE id=1;";$sql2 = "DELETE FROM myTable1 WHERE id=2;";//删除数据if ($conn->query($sql1) === TRUE && $conn->query($sql2) === TRUE) {    //提交事务    $conn->commit();    echo "所有数据删除成功";} else {    echo "删除失败: " . $conn->error;    //回滚事务，撤销删除操作    $conn->rollback();}//关闭连接$conn->close();?>