关于截取以逗号隔开的字符串位数解决办法

$s = '0,48423,48425,48427,48419,48413,48415,48417,48418,48414,48416,48411,';


echo preg_replace('/\d+,((?:\d+,){3}\d+).*/', '$1', $s);

$string = "0,48423,48425,48427,48419,48413,48415,48417,48418,48414,48416,48411,";

 $ar=explode(',',$string);

  $arr=array_slice($ar,1,4);

  echo join(',',$arr);

	$str="0,48423,48425,48427,48419,48413,48415,48417,48418,48414,48416,48411,";

	function jiequ($str,$a,$b){

		$ar=explode(",",$str);

		for($i=$a;$i
			$br[]=$ar[$i];

		}

		return implode(",",$br);

	}

	echo jiequ($str,1,5);//1和5表示截取第一个,和第5个,之间的数