Saving PHP output as a file

[gerkintrigg]

I wondered if anyone knows how to save the rendered output of a PHP script as a file?

 

I have a script that creates dynamic PDF documents, but want to save it as a file, rather than render it to the browser. could I do something like

$file=save_as_file(output('file.php'));

 

?

(I know the code above is wrong)

[trq]

ob_start()
include "filetocapture.php";
file_put_contents('filetosave.txt', ob_get_clean());

[gerkintrigg]

thanks.