Adding A file Extension

[ray4498]

I am very new to this, so this should be simple.  I have the code (below) and as you can see am getting a variable from the post of another page and then that is creating a file with the $_POST['quantity'] name.  What I need to do is add the extension.txt to the $_POST['quantity'] name.  How would I do this?

<?php


$ourFileName = "testFile.txt";
$ourFileHandle = fopen($ourFileName, 'w') or die("can't open file");
fclose($ourFileHandle);



$file_old = "testFile.txt";
$file_new = $_POST['quantity'];


$New_Ext = ".txt" ;


if(!rename($file_old, $file_new))
{
    echo ("Rename failed");
}



?>

[cunoodle2]

<?php

$New_Ext = ".txt" ;
$file_old = "testFile.txt";
$file_new = $_POST['quantity'].$New_Ext;

?>

 

OR..

<?php

$file_new = $_POST['quantity'];
$file_new .= ".txt";

?>

[ray4498]

Thanks a lot cunoodle2, it worked perfectly

Ray