关于截取以逗号隔开的字符串位数

Question

本帖最后由 liangcaijian 于 2013-01-18 16:06:09 编辑

Answer 1

$s = '0,48423,48425,48427,48419,48413,48415,48417,48418,48414,48416,48411,';echo preg_replace('/\d+,((?:\d+,){3}\d+).*/', '$1', $s);

Answer 2

$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);

Answer 3

$str="0,48423,48425,48427,48419,48413,48415,48417,48418,48414,48416,48411,";
function jiequ($str,$a,$b){
$ar=explode(",",$str);
for($i=$a;$i<$b;$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