$str = "
1501190519-5-4-6-731组六组六组六1713大大,双单
大单,双大
1501190529-5-4-6-731组六组六组六1713大大,双单
大单,双大
";
$match = array();
$arr = array_filter(explode('
',$str));
foreach ($arr as $k=>$v){
preg_match_all("/(?<=>)\d.*?(?=<\/li>)/", $v, $match[$k]);
}
var_dump($match);
