Location: PHPKode > projects > BackendPro > install/common/CommonFunctions.php
<?php

/**
 * Tests for file writability
 *
 * is_writable() returns TRUE on Windows servers when you really can't write to 
 * the file, based on the read-only attribute.  is_writable() is also unreliable
 * on Unix servers if safe_mode is on. 
 *
 * @access	private
 * @return	void
 */
function is_really_writable($file)
{	
	// If we're on a Unix server with safe_mode off we call is_writable
	if (DIRECTORY_SEPARATOR == '/' AND @ini_get("safe_mode") == FALSE)
	{
		return is_writable($file);
	}

	// For windows servers and safe_mode "on" installations we'll actually
	// write a file then read it.  Bah...
	if (is_dir($file))
	{
		$file = rtrim($file, '/').'/'.md5(rand(1,100));

		if (($fp = @fopen($file, 'ab')) === FALSE)
		{
			return FALSE;
		}

		fclose($fp);
		@chmod($file, 0777);
		@unlink($file);
		return TRUE;
	}
	elseif (($fp = @fopen($file, 'ab')) === FALSE)
	{
		return FALSE;
	}

	fclose($fp);
	return TRUE;
}

?>
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