忽略可选逗号的正则表达式

我有一篇课文:

$test = <<<START
 DOTHIS themsp1
  @theint =    431,
  @theText = "%dumdum%",
  @operator = 'ANY',
  @crossCheck = 'PLUS'


START;

过滤器:

$regEx = '/@(.*)=(.*)[,]*?/';
preg_match_all($regEx,$test,$vars,PREG_SET_ORDER);
print_r($vars);

输出:

Array
(
    [0] => Array
        (
            [0] => @theint =  431,
            [1] => theint 
            [2] =>   431,
        )

    [1] => Array
        (
            [0] => @theText = "%dumdum%",
            [1] => theText 
            [2] =>  "%dumdum%",
        )

    [2] => Array
        (
            [0] => @operator = 'ANY',
            [1] => operator 
            [2] =>  'ANY',
        )

    [3] => Array
        (
            [0] => @crossCheck = 'PLUS'
            [1] => crossCheck 
            [2] =>  'PLUS'
        )

)

我不想在输出中使用逗号或空格:(..问题是逗号是可选的;