php - 如果 Post 值等于其他 post 值以外的值，则回显“失败”；？

Question

我有两个组合框，一个用于报告得分，一个用于设置进球者，如果在 post['submit'] 上，我该如何做到这一点

如果 $_POST['Score1'] 和 $_POST['Score2']
不等于
$_POST['homegoalscorer1'] 和 $_POST['awaygoalscorer1']
然后回显“失败”；

就像是;

 if(isset($_POST['submit']))   
 {
 $homescore = $_POST['Score1'];
 $awayscore = $_POST['Score2'];

 $homegoalscorer = $_POST['homegoalscorer1'];
 $awaygoalscorer =  $_POST['awaygoalscorer1'];

   if '$homescore' + '$awayscore' != $homegoalscorer + $awaygoalscorer {
      echo "failed";
   }
      else {

            }
  }

有任何想法吗？

Answer 1

变量上的单引号将把该变量引入一个字符串而不执行。你也忘了加括号:

if(isset($_POST['submit']))   {
    $homescore = (float)$_POST['Score1'];
    $awayscore = (float)$_POST['Score2'];

    $homegoalscorer = (float)$_POST['homegoalscorer1'];
    $awaygoalscorer =  (float)$_POST['awaygoalscorer1'];

    if (($homescore+$awayscore) != ($homegoalscorer+$awaygoalscorer)) {
        echo "failed";
    } else {

    }
}