Simple config file parser

gistfile1.txt

<?php
function parseFile($file) {
	$matches = array();
        $pattern = '/(.+?)\s+(.+?)\n/';
	preg_match_all($pattern, file_get_contents($file), $matches);
        $matches[2] = array_map(function($value)  { preg_match_all('/\G(?:^|,)(?:"([^"]*+(?:""[^"]*+)*+)"|([^",]*+))/x', $value, $ret); return (count($ret[2])>1)?$ret[2]:$ret[2][0]; } , $matches[2]);
	return array_combine($matches[1], $matches[2]);
}

print_r(parseFile('input.txt'));

/**
Example file:

key1        value1
key2	value2,value2-1,value2-2,value2-3
key3            value3
key4	value4
key5        value5, value5-1

Result:

Array
(
    [key1] => value1
    [key2] => Array
        (
            [0] => value2
            [1] => value2-1
            [2] => value2-2
            [3] => value2-3
        )

    [key3] => value3
    [key4] => value4
    [key5] => Array
        (
            [0] => value5
            [1] =>  value5-1
        )

)
*/