Parse a string and split it into key value pairs, the php parse_str()

parse_str.js

/**
 * Parses the string into variables
 * 
 * @param   mixed $string
 * @param   mixed $equal
 * @param   mixed $separator
 * 
 * @author  Mohammed Al Ashaal <is.gd/alash3al>
 * @version 1.0.0
 * 
 * @return  Object
 */
function parse_str($string, $equal, $separator)
{
    $equal      =   (typeof $equal       == 'undefined') ? '=' : $equal;
    $separator  =   (typeof $separator   == 'undefined') ? '&' : $separator;
    $ret        =   {};

    if ( $string.indexOf('?') === 0 )
        $string = $string.substr($string.indexOf('?') + 1);

    $array      =   $string.split($separator);

    for ( $i in $array ) {
        $s = $array[$i].split($equal);
        $ret[$s[0].trim()] = $s[1];
    }

    return $ret;
}