Question

    //validate email

    if(empty($email)){
        $mailErr = "<div class='errors'>Email can not be empty.</div>";
    }else{
        if(!(preg_match("/^[a-zA-Z0-9\-_]+(\.[a-zA-Z0-9\-_]+)*@[a-z0-9]+(\-[a-z0-9]+)*(\.[a-z0-9]+(\-[a-z0-9]+)*)*\.[a-z]{2,4}$/", $email))){
            $mailErr = "<div class='errors'>Please input a valid email address.</div>";
        }
    }


    //validate message
    if (empty($message)) {
        $messageErr = "<div class='errors'>Message can not be empty.</div>";
    }

如果两个验证均为真，则发送邮件。请帮我。我该怎么写这个条件。如果两个条件都满足，我想发送邮件。

Answer 1

// Validate email
if (empty($email)) {
    $mailErr = "<div class='errors'>Email can not be empty.</div>";
} else if (!(preg_match("/^[a-zA-Z0-9\-_]+(\.[a-zA-Z0-9\-_]+)*@[a-z0-9]+(\-[a-z0-9]+)*(\.[a-z0-9]+(\-[a-z0-9]+)*)*\.[a-z]{2,4}$/", $email))){
    $mailErr = "<div class='errors'>Please input a valid email address.</div>";
} else {
    $valid_email = true;
}

// Validate message
if (empty($message)) {
    $messageErr = "<div class='errors'>Message can not be empty.</div>";
}else{
    $valid_message = true;
}

if ($valid_email && $valid_message) {
    // Send the email
}

Answer 2

有一个简短的表单可以使用FILTER_VALIDATE_EMAIL验证电子邮件地址，您可以安全地保存一个包含错误状态的变量。

$error = false;

if(!filter_var($email, FILTER_VALIDATE_EMAIL)) {
   $mailErr = "<div class='errors'>Please input a valid email address.</div>";
   $error = true;
}

if (empty($message)) {
   $messageErr = "<div class='errors'>Message can not be empty.</div>";
   $error = true;
}

if(!$error) {
    //Send message here
}

您也可以在不使用状态变量的情况下使用简短形式（但不能同时检查两者）：

if(!filter_var($email, FILTER_VALIDATE_EMAIL)) {
   $mailErr = "<div class='errors'>Please input a valid email address.</div>";
} else if (empty($message)) {
   $messageErr = "<div class='errors'>Message can not be empty.</div>";
} else {
    //Send message here
}

表格使用preg_match验证并在所有条件都填写后发送邮件

2 个答案: