Question

我有联系表单，您可以在其中添加多个收件人，但是当我将其上传到服务器上时，会出现以下错误：

注意：未定义的索引：收件人 /var/www/vhosts/partizanas.lt/httpdocs/brief/contactform.php上线 17注意：未定义的索引：receive0 in /var/www/vhosts/partizanas.lt/httpdocs/brief/contactform.php上线 18注意：未定义索引：receive1 in /var/www/vhosts/partizanas.lt/httpdocs/brief/contactform.php上线 19注意：未定义索引：receive2 in /var/www/vhosts/partizanas.lt/httpdocs/brief/contactform.php上线 20注意：未定义索引：receive3 in /var/www/vhosts/partizanas.lt/httpdocs/brief/contactform.php上线 21注意：未定义的索引：电子邮件 /var/www/vhosts/partizanas.lt/httpdocs/brief/contactform.php上线 22"

我写了修复错误的if条件：

if (isset($_POST['Submit']))    
{    

$formproc->AddRecipient($_POST["recipient"]); 
$formproc->AddRecipient($_POST["recipient0"]); 
$formproc->AddRecipient($_POST["recipient1"]); 
$formproc->AddRecipient($_POST["recipient2"]); 
$formproc->AddRecipient($_POST["recipient3"]);  
$formproc->AddRecipient($_POST["email"]); 
}

但问题是，如果有空输入字段，则表单不会被发送。并且我希望它在不填写所有字段时发送表单。

有任何建议怎么做？

Answer 1

Check this answer

在将一个文件包含到另一个使用相同变量名的文件的情况下，依赖于未初始化变量的默认值是有问题的。打开register_globals也是一个主要的安全风险。如果使用未初始化的变量，则会发出E_NOTICE级别错误，但是在未初始化的数组中附加元素时则不会。 isset（）语言构造可用于检测变量是否已经初始化。

Answer 2

if (isset($_POST['Submit']))    
{    
if(isset($_POST["recipient"]) && $_POST["recipient"] !="" ){$formproc->AddRecipient($_POST["recipient"]);}
if(isset($_POST["recipient1"]) && $_POST["recipient"] !="" ){$formproc->AddRecipient($_POST["recipient1"]);}
if(isset($_POST["recipient2"]) && $_POST["recipient"] !="" ){$formproc->AddRecipient($_POST["recipient2"]);}
if(isset($_POST["recipient3"]) && $_POST["recipient"] !="" ){$formproc->AddRecipient($_POST["recipient3"]);}
$formproc->AddRecipient($_POST["email"]); 
}

Answer 3

考虑以下代码来解决您的问题：

if (isset($_POST['Submit']))    
{    

    if(!empty($_POST["recipient"])) {
        $formproc->AddRecipient($_POST["recipient"]); 
    }

    if(!empty($_POST["recipient0"])) {
        $formproc->AddRecipient($_POST["recipient0"]); 
    }

    if(!empty($_POST["recipient1"])) {
        $formproc->AddRecipient($_POST["recipient1"]); 
    }

    if(!empty($_POST["recipient2"])) {
        $formproc->AddRecipient($_POST["recipient2"]); 
    }

    if(!empty($_POST["recipient3"])) {
        $formproc->AddRecipient($_POST["recipient3"]);  
    }

    if(!empty($_POST["email"])) {
        $formproc->AddRecipient($_POST["email"]); 
    }
}

这里的想法是在输入字段为空时不执行AddRecipient（）函数。！empty（）函数为你完成这项工作。

如果条件不允许留空字段

3 个答案: