Answers for "return file in php"

read file data using php

<?php

$fh = fopen('filename.txt','r');
while ($line = fgets($fh)) {
  // <... Do your work with the line ...>
  // echo($line);
}
fclose($fh);
?>

take file data in variable php

I suppose you want to get the content generated by PHP, if so use:

$Vdata = file_get_contents('http://YOUR_HOST/YOUR/FILE.php');

Otherwise if you want to get the source code of the PHP file, its the same as 
a .txt file:

$Vdata = file_get_contents('path/to/YOUR/FILE.php');