Question

我的PHP代码出错了。我使用IF-ELSE检查一切正常，但它一直给我“你没有输入收件人”。

<?php

$to=trim($_POST['toperson']);
$from=trim($_POST['spoofrom']);
$message=trim($_POST['message']);
$subject=trim($_POST['subj']);


if (substr_count($to, '@') <= 1 ) {
    if (!isset($to)) {
        if (!isset($from)) {
            if (!isset($subject)) {
                if (!isset($message)) {
                    mail($to, $subject, $message, "From: " . $from);
                    print "Message was sent!";
                }else {print "You did not enter a message";} 
            }else {print "You did not enter a subject";}
        }else {print "You did not enter a from email";}
    }else {print "You did not enter a recipient";}
}else{print "You entered 2 or more emails.";}

?>

Answer 1

尝试

按if (!isset($to))替换您的条件if (isset($to)) 并添加空检查

文档： http://php.net/manual/en/function.isset.php

http://www.php.net/manual/en/function.empty.php

像这样：

if (substr_count($to, '@') <= 1 ) {
    if (isset($to) && !empty($to)) {
        if (isset($from) && !empty($from)) {
            if (isset($subject) && !empty($subject)) {
                if (isset($message) && !empty($message)) {
                    mail($to, $subject, $message, "From: " . $from);
                    print "Message was sent!";
                }else {print "You did not enter a message";} 
            }else {print "You did not enter a subject";}
        }else {print "You did not enter a from email";}
    }else {print "You did not enter a recipient";}
}else{print "You entered 2 or more emails.";}

Answer 2

你最终的意思是：empty（）而不是isset（），因为它总是被设置......但并不总是被填充？

或者检查是否isset($_POST['to'])和其他键，但不要在指定的变量上使用isset（检查is_null / === null更好

Answer 3

如果您的所有表单数据都是空的，您的代码将发送邮件。 if(!isset($_POST["something"]) 表示如果未设置数据，则会触发条件过程。

删除感叹号。

Answer 4

确保您的表单使用正则表达式＆amp; |进行适当的验证表单提交前的html5 / css3。最后使用！empty（）verse isset（），我建议把

if (mail($to, $subject, $message, "From: " . $from)) { 
   print "Message was sent!";
} else { print "email failed to send!"; }

另外，我将From：设置变量时没有调用它，但这更偏向个人。

$from= "From: trim($_POST['spoofrom'])";

发送邮件[PHP]

4 个答案: