foreach的总价值

Question

请帮助完成此功能我想在此计算$ answer的总值。

<?php 
  foreach($_POST as $fieldName=> $answer){
   if($answer=="1"){settype($answer, "integer");
   if(is_int($answer)){  
     //I want to echo the total value of $answer. Right now it gives me "1111" instead of "4"       and I want 4.
   }
?>

Answer 1

$new_answer = 0;

foreach($_POST as $fieldName=> $answer)
{

    if($answer=="1"){settype($answer, "integer");
    if(is_int($answer)){  
        $new_answer = $new_answer + $answer 
}

echo $new_answer;

Answer 2

PHP语言是multitype，因此您只需检查值即可简化代码：

$total = 0;
foreach($_POST as $fieldName => $answer)
{
    ( $answer == (int) $answer ) && $total+= $answer;
}

我的问题是否正确？

Answer 3

你可以试试这个，

<?php $myTotal = 0;
  foreach($_POST as $fieldName=> $answer){
   if($answer=="1"){settype($answer, "integer"); }
       if(is_int($answer)){  
          $myTotal +=$answer;
       }
   }
?>