php怎么去除多余的逗号 例如：一串字符串 111,222,,,333,444,,处理之后返回 111,222,333,44

Question

字符串的逗号是无规则如：111,222,,,333,444,,又如：,,,111,222,,,333,444又如：111,222,,,333,444又如：,,,1881,,,,414,,,,,又如：,,,111,222,,,333,又如：,,,111,其中数也不规定长度的

Answer 1

$str="111,222,,,333,,444,,,,666";
$sttr=str_replace(',,,',','$str);
$sttr=str_replace(',,,,',','$str);

追问

字符串的逗号是无规则

追答

$str="111,222,,,333,,444,,,,666";
$arr_str=explode(',',$str);
$arr_str=array_filter($arr_str);

foreach($arr_str as $val){
$ret[]=$val;

}
$new_str=implode(','$ret);
print_r($new_str);

Answer 2

8888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888