一个关于正则去除小数点的有关问题，请大侠指教

$a = 'aaa,bbb,ccc,"eee,ccc,sss,ppp",dddd,iiii,cccc';

$a = 'aaa,bbb,ccc,"eee,ccc,sss,ppp",dddd,iiii,cccc';
echo preg_replace_callback('/".+?"/', function($r) { return str_replace(',', ' ', $r[0]);}, $a);

$a = 'aaa,bbb,ccc,"eee,ccc,sss,ppp",dddd,iiii,cccc';

$new=preg_replace('/"(.+?)"/ies',"replace('\\1')",$a);
echo $new;
//aaa,bbb,ccc,"eeecccsssppp",dddd,iiii,cccc

function replace($str){
	$return=str_replace(',','',$str);
	return '"'.$return.'"';
}

$a = 'aaa,bbb,ccc,"eee,ccc,sss,ppp",dddd,iiii,cccc';
echo preg_replace('/(?<=")(.+?)(?=")/e', 'str_replace(",", " ", "$1")',$a);