Question

我已经写了这样的功能，现在它返回“你正在运行一个全面的广告活动”，即使我没有选择任何方框或只选择一两个。我假设问题出在if语句中，我是否需要运行isset两次？

function adMix () {
$tv = (isset($_POST['TV']));
$radio = (isset($_POST['Radio']));
$search = (isset($_POST['Search']));
$mobile = (isset($_POST['Mobile']));
$mail = (isset($_POST['Mail']));
if ($tv || $radio || $search || $mobile || $mail) {
    echo "You are running a comprehensive ad campaign.";
} else {
    echo "You can do more to market your dealership.";
}

}

Answer 1

尝试使复选框表现为一个数组，将它们全部重命名为mktg[]，例如：

<p>Marketing Mix:</p>    
 <input type="checkbox" name="mktg[]" value="TV">TV<br>
 <input type="checkbox" name="mktg[]" value="Radio">Radio<br>
 <input type="checkbox" name="mktg[]" value="Search">Search<br>
 <input type="checkbox" name="mktg[]" value="Mobile">Mobile<br>
 <input type="checkbox" name="mktg[]" value="Mail">Direct Mail<br>
<br>

功能：

function adMix(){
    if($_POST){
       if(!empty($_POST['mktg'])){
           if(count($_POST['mktg'])) echo "You are running a comprehensive ad campaign.";
       }else echo "You can do more to market your dealership.";
    }
}

这样，if(count($_POST['mktg']))验证是否选中了任何选项并返回true。如果你需要定义必须选择多少选项才能使竞选成为现实，让我们说3，就这样做：

if(count($_POST['mktg']) >= 3)

Answer 2

function adMix () {
  if (isset($_POST['Tv']) || isset($_POST['Radio']) || isset($_POST['Search']) || isset($_POST['Mobile']) || isset($_POST['Mail'])) {
    $tv = isset($_POST['Tv'])?$_POST['Tv']:""; //You can access the index only if it's set, else you will be shown a notice
    $radio = isset($_POST['Radio'])?$_POST['Radio']:"";
    $search = isset($_POST['Search'])?$_POST['Search']:"";
    $mobile = isset($_POST['Mobile'])?$_POST['Mobile']:"";
    $mail = isset($_POST['Mail'])?$_POST['Mail']:"";
    echo "You are running a comprehensive ad campaign.";
  } else {
    echo "You can do more to market your dealership.";
  }
}

Answer 3

试试这个：

function adMix () { 
@$tv = $_POST['TV'];
@$radio = $_POST['Radio'];
@$search = $_POST['Search'];
@$mobile = $_POST['Mobile'];
@$mail = $_POST['Mail'];
if (isset($tv) || isset($radio) || isset($search) || isset($mobile) || isset($mail)) {
    echo "You are running a comprehensive ad campaign.";
} else {
    echo "You can do more to market your dealership.";
}
}

无法获得简单的PHP函数来执行

3 个答案: