最近我在我的网站上添加了一个PHP邮件表单，用户可以在那里发送电子邮件并收到它们。然而，由于一个奇怪的原因，错误消息不会显示在用户屏幕上。
例如，如果用户将字段留空并单击“提交”，则会发送电子邮件而不会给出错误，并说明该字段是必需的。
这里是验证器的PHP代码：
<?php
define("EMAIL", "ITSPRIVATE@outlook.com");
if(isset($_POST['submit'])) {
include('validate.class.php');
//assign post data to variables
$name = trim($_POST['name']);
$email = trim($_POST['email']);
$message = trim($_POST['message']);
//start validating our form
$v = new validate();
$v->validateStr($name, "name", 3, 75);
$v->validateEmail($email, "email");
$v->validateStr($message, "message", 5, 1000);
if(!$v->hasErrors()) {
$header = "From: $email\n" . "Reply-To: $email\n";
$subject = "Contact Form Subject";
$email_to = EMAIL;
$emailMessage = "Name: " . $name . "\n";
$emailMessage .= "Email: " . $email . "\n\n";
$emailMessage .= $message;
//use php's mail function to send the email
@mail($email_to, $subject ,$emailMessage ,$header );
//grab the current url, append ?sent=yes to it and then redirect to that url
$url = "http". ((!empty($_SERVER['HTTPS'])) ? "s" : "") . "://".$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI'];
header('Location: '.$url."?sent=yes");
} else {
//set the number of errors message
$message_text = $v->errorNumMessage();
//store the errors list in a variable
$errors = $v->displayErrors();
//get the individual error messages
$nameErr = $v->getError("name");
$emailErr = $v->getError("email");
$messageErr = $v->getError("message");
}//end error check
}// end isset
?>
<?php
<div id="mainbox">
<div id="contact_form_wrap">
<span class="message"><?php echo $message_text; ?></span>
<?php echo $errors; ?>
<?php if(isset($_GET['sent'])): ?><h2>Your message has been sent</h2><?php endif; ?>
<form id="contact_form" method="post" action=".">
<p><label>Name:<br />
<input type="text" name="name" class="textfield" value="<?php echo htmlentities($name); ?>" />
</label><br /><span class="errors"><?php echo $nameErr; ?></span></p>
<p><label>Email: <br />
<input type="text" name="email" class="textfield" value="<?php echo htmlentities($email); ?>" />
</label><br /><span class="errors"><?php echo $emailErr ?></span></p>
<p><label>Message: <br />
<textarea name="message" class="textarea" cols="45" rows="5"><?php echo htmlentities($message); ?></textarea>
</label><br /><span class="errors"><?php echo $messageErr ?></span></p>
<p><input type="submit" name="submit" class="button" value="Submit" /></p>
</form>
</div>
</div>
这是validate.class.php的代码。
<?php
class validate {
// ---------------------------------------------------------------------------
// paramaters
// ---------------------------------------------------------------------------
/**
* Array to hold the errors
*
* @access public
* @var array
*/
public $errors = array();
// ---------------------------------------------------------------------------
// validation methods
// ---------------------------------------------------------------------------
/**
* Validates a string
*
* @access public
* @param $postVal - the value of the $_POST request
* @param $postName - the name of the form element being validated
* @param $min - minimum string length
* @param $max - maximum string length
* @return void
*/
public function validateStr($postVal, $postName, $min = 5, $max = 500) {
if(strlen($postVal) < intval($min)) {
$this->setError($postName, ucfirst($postName)." must be at least {$min} characters long.");
} else if(strlen($postVal) > intval($max)) {
$this->setError($postName, ucfirst($postName)." must be less than {$max} characters long.");
}
}// end validateStr
/**
* Validates an email address
*
* @access public
* @param $emailVal - the value of the $_POST request
* @param $emailName - the name of the email form element being validated
* @return void
*/
public function validateEmail($emailVal, $emailName) {
if(strlen($emailVal) <= 0) {
$this->setError($emailName, "Please enter an Email Address");
} else if (!preg_match('/^[^0-9][a-zA-Z0-9_]+([.][a-zA-Z0-9_]+)*[@][a-zA-Z0-9_]+([.][a-zA-Z0-9_]+)*[.][a-zA-Z]{2,4}$/', $emailVal)) {
$this->setError($emailName, "Please enter a Valid Email Address");
}
}// end validateEmail
// ---------------------------------------------------------------------------
// error handling methods
// ---------------------------------------------------------------------------
/**
* sets an error message for a form element
*
* @access private
* @param string $element - name of the form element
* @param string $message - error message to be displayed
* @return void
*/
private function setError($element, $message) {
$this->errors[$element] = $message;
}// end logError
/**
* returns the error of a single form element
*
* @access public
* @param string $elementName - name of the form element
* @return string
*/
public function getError($elementName) {
if($this->errors[$elementName]) {
return $this->errors[$elementName];
} else {
return false;
}
}// end getError
/**
* displays the errors as an html un-ordered list
*
* @access public
* @return string: A html list of the forms errors
*/
public function displayErrors() {
$errorsList = "<ul class=\"errors\">\n";
foreach($this->errors as $value) {
$errorsList .= "<li>". $value . "</li>\n";
}
$errorsList .= "</ul>\n";
return $errorsList;
}// end displayErrors
/**
* returns whether the form has errors
*
* @access public
* @return boolean
*/
public function hasErrors() {
if(count($this->errors) > 0) {
return true;
} else {
return false;
}
}// end hasErrors
/**
* returns a string stating how many errors there were
*
* @access public
* @return void
*/
public function errorNumMessage() {
if(count($this->errors) > 1) {
$message = "There were " . count($this->errors) . " errors sending your message!\n";
} else {
$message = "There was an error sending your message!\n";
}
return $message;
}// end hasErrors
}// end class
感谢您就如何解决这个问题提出建议。
答案 0 :(得分：1)
验证位按预期工作;这是你的表格action导致它不会被激发。
取出action="."。
所以
<form id="contact_form" method="post">
将在同一页面上显示表单。
您可以在此处看到验证工作正常，http://ideone.com/KV9CLX。
同样如此指出
<?php
<div id="mainbox">
会导致错误，但可能是您的实际代码中没有错误，或者您没有任何输出..