How to call a function in PHP file in another folder by a controller in custom module?

Question

I need to call PHP function within my custom module controller. But the relevant PHP file contain in different folder. How I solve this? `

<?php function doLog($text) { 
// open log file
$filename = "form_ipn.log";
$fh = fopen($filename, "a") or die("Could not open log file.");
fwrite($fh, date("d-m-Y, H:i")." - $text\n") or die("Could not write
file!");
fclose($fh);
}
doLog("This is test");
?>  

Answer 1

You can mention URL like $url = 'http://127.0.0.1/magento/testing/curl.php'; or you should get base directory like $media_path = Mage::getBaseDir('media'); or you can redirect to relevant URL.