PHP to find possible file and directory permissions to be used by Symphony CMS

test_permissions.php

<?php
/*
 * This is just a test. Code could be written in much fewer lines :).
 */
	function findPerms() {
		$fstat = $dstat = array('uid' => 0, 'gid' => 0);

		// Get information about newly created directory
		if (!mkdir('test')) {
			// TODO: throw error here?
			echo "ERROR: could not create test directory. Make sure that Symphony can create child directories, at least while installing/updating itself.";
			return array();
		}
		$dstat = stat('test');

		// Get information about newly created file
		if (file_put_contents('test/test.txt', 'test')) {
			$fstat = stat('test/test.txt');
			unlink('test/test.txt');
		}

		// Cleanup
		rmdir('test');

		// Get iformation about FTP uploaded directory
		$ftpdstat = stat('symphony');

		// Get information about FTP uploaded file
		$ftpfstat = stat(__FILE__);

		// TODO: throw error if $ftp* are not arrays?

		$result = array();
		if ($ftpfstat['uid'] == $fstat['uid']) {
			$result['file'] = '644';
		}
		else if ($ftpfstat['gid'] == $fstat['gid']) {
			$result['file'] = '664';
		}
		else if (isset($fstat['mode'])) {
			// TODO: we could check if PHP needs executable flag,
			//       by creating test.php instead of test.txt,
			//       and using Gateway to check if it returns correct output.
			$result['file'] = substr(decoct($fstat['mode']), -3);
		}
		else {
			// Everything failed, so return "default" defaults ;(.
			$result['file'] = '644';
		}

		if ($ftpdstat['uid'] == $dstat['uid']) {
			$result['directory'] = '755';
		}
		else if ($ftpdstat['gid'] == $dstat['gid']) {
			$result['directory'] = '775';
		}
		else if (isset($dstat['mode'])) {
			// TODO: we could check if PHP needs executable flag,
			//       by creating test.php instead of test.txt,
			//       and using Gateway to check if it returns correct output.
			$result['directory'] = substr(decoct($dstat['mode']), -3);
		}
		else {
			// Everything failed, so return "default" defaults ;(.
			$result['directory'] = '755';
		}

		return $result;
	}

	var_dump(findPerms());