如何在php中创建一个文件和数据存储？

$myFile = "folder1/folder2/order.txt";
$fh = fopen($myFile, 'a');fwrite($fh, $Message);
    fclose($fh);

I am use this code.But file is not create in that particular folder

Try this:

<?php 
$myFile = "folder1/folder2/order.txt";
$fh = fopen($myFile, 'a'); or die("Unable to open the file");
fwrite($fh, $Message);
fclose($fh);
?>

If this code shows "Unable to open the file" that means there is something wrong while opening the file. This may happen if the folder1/folder2 doesn't exist. Or may be you are not permitted to open a file to write on that folder. If you are in Linux you can change the permission of you directory like this:

chmod 777 folder/folder2