即使错误字段fnameErr, lnameErr为空，我的代码仍在打印"不发送电子邮件"
// define variables and set to empty values
$nameErr = $emailErr = $genderErr = $websiteErr = "";
$name = $email = $gender = $comment = $website = "";
if ($_SERVER["REQUEST_METHOD"] == "POST") {
if (empty($_POST["fname"])) {
$fnameErr = "First Name is required";
} else {
$fname = test_input($_POST["fname"]);
// check if name only contains letters and whitespace
if (!preg_match("/^[a-zA-Z ]*$/",$fname)) {
$fnameErr = "Only letters and white space allowed";
}
$stop=true;
}
if (empty($_POST["lname"])) {
$lnameErr = "Last Name is required";
} else {
$lname = test_input($_POST["lname"]);
// check if name only contains letters and whitespace
if (!preg_match("/^[a-zA-Z ]*$/",$lname)) {
$lnameErr = "Only letters and white space allowed";
}
$stop=true;
}
if (empty($_POST["email"])) {
$emailErr = "Email is required";
} else {
$email = test_input($_POST["email"]);
// check if e-mail address is well-formed
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
$emailErr = "Invalid email format";
}
$stop=true;
}
if (empty($_POST["phone"])) {
$phoneErr = "Phone is required";
$stop=true;
}
if (empty($_POST["comment"])) {
$commentErr = "Comments is required";
$stop=true;
}
if(!$stop)
{
echo "send an email";
}
}
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
我的网页代码
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
<fieldset>
<h4> </h4>
<div class="form-group">
<div class="col-md-6">
<input id="fname" name="fname" type="text" placeholder="First Name" class="form-control" value="<?php echo $_POST["fname"];?>"><span class="error"><?php echo $fnameErr;?></span>
</div>
</div>
<div class="form-group">
<div class="col-md-6">
<input id="lname" name="lname" type="text" placeholder="Last Name" class="form-control" value="<?php echo $_POST["lname"];?>"><span class="error"><?php echo $lnameErr;?></span>
</div>
</div>
<div class="form-group">
<div class="col-md-6">
<input id="email" name="email" type="text" placeholder="Email Address" class="form-control" value="<?php echo $_POST["email"];?>"><span class="error"><?php echo $emailErr;?></span>
</div>
</div>
<div class="form-group">
<div class="col-md-6">
<input id="phone" name="phone" type="text" placeholder="Phone" class="form-control" value="<?php echo $_POST["phone"];?>"><span class="error"><?php echo $phoneErr;?></span>
</div>
</div>
<div class="form-group">
<div class="col-md-6">
<textarea class="form-control" id="comment" name="comment" placeholder="Enter your message" rows="7"><?php echo $_POST["comment"];?></textarea><span class="error"><?php echo $commentErr;?></span>
</div>
</div>
<div class="form-group">
<div class="col-md-12 text-left">
<button type="submit" name="submit" class="btn btn-primary readmmore">Submit</button>
</div>
</div>
</fieldset>
</form>
如果你只希望 fNameErr 和 LnameErr 停止发送，那么你必须使用：
if(empty($fnameErr) && empty(lnameErr) && empty(emailErr) && empty(phoneErr) && empty(commentErr))
{
echo "send an email";
}
试试这个（你在错误的地方将$stop设置为 true）：
// define variables and set to empty values
$nameErr = $emailErr = $genderErr = $websiteErr = "";
$name = $email = $gender = $comment = $website = "";
// Let's explicityly set $stop to false(some PHP settings require this)
$stop = False;
if ($_SERVER["REQUEST_METHOD"] == "POST") {
if (empty($_POST["fname"])) {
$fnameErr = "First Name is required";
$stop=true;
} else {
$fname = test_input($_POST["fname"]);
// check if name only contains letters and whitespace
if (!preg_match("/^[a-zA-Z ]*$/",$fname)) {
$fnameErr = "Only letters and white space allowed";
$stop=true;
}
}
if (empty($_POST["lname"])) {
$lnameErr = "Last Name is required";
$stop=true;
} else {
$lname = test_input($_POST["lname"]);
// check if name only contains letters and whitespace
if (!preg_match("/^[a-zA-Z ]*$/",$lname)) {
$lnameErr = "Only letters and white space allowed";
$stop=true;
}
}
if (empty($_POST["email"])) {
$emailErr = "Email is required";
$stop=true;
} else {
$email = test_input($_POST["email"]);
// check if e-mail address is well-formed
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
$emailErr = "Invalid email format";
$stop=true;
}
}
if (empty($_POST["phone"])) {
$phoneErr = "Phone is required";
$stop=true;
}
if (empty($_POST["comment"])) {
$commentErr = "Comments is required";
$stop=true;
}
if ($stop){
// Validation failed, dont send email
} else {
// Validation passed, send email
}
}