php从另一个文件创建文件

Im new to php and I'm just trying stuff out, and I was wondering if i could take text from one file then put it into another.
For example have a .txt file that contains :

<?php
      echo "Hello World";
?>

but then have a script run that takes that text and puts it into a new .php file.

When you have php code in that file you also could just use:

Include 'example.php';

If I understand you correctly, what are you trying to achive is copying a content of a text file to a php file.

Simpliest way to do it:

<?php
   $sourceFile = 'example.txt';
   $destinyFile = 'example.php';

   if (copy($sourceFile, $destinyFile))
      echo "DONE";