$aa=aaahaabbbhbbccchcc;输出显示为aaahaabbbhbbccchcc

//先将字符串按行分割成数组 $str_arr = explode("\n", $aa); foreach ($str_arr as $str) { //再将每一行按逗号分割成数组 $arr = explode(",", $str); //输出数组中的元素，用空格隔开 echo implode("，", $arr) . "
"; }