Mis-directed contact form on send

[webiter]

The form action="<?php echo $_SERVER['PHP_SELF'];?>

yet the form when sent presents a Oops page! Page not found in lieu of the "Your message has been sent"

The form handler is as follows:

<?php
define("EMAIL", "xxxxxx@gmail.com");

$messageErr = "";
$message_text = "";
$errors = "";

$nameErr = "";
$emailErr = "";
$phoneErr = "";
$messageErr = "";
$codeErr = "";

$name = "";
$email = "";
$phone = "";
$message = "";
$code = "";

if(isset($_POST['submit'])) {
 
  include('validateClass.php');
 
  //assign post data to variables
    $name    = trim($_POST['name']);
    $email   = trim($_POST['email']);
    $phone   = trim($_POST['phone']);
    $message = trim($_POST['message']);
    $code    = trim($_POST['code']);
 
  //start validating our form
  $v = new validate();
  $v->validateStr($name, "name", 3, 75);
  $v->validateEmail($email, "email");
  $v->validatePhone($phone, "phone");
  $v->validateStr($message, "message", 10, 500); 
  $v->validateCode($code, "code");
 
  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";
        $emailMessage .= "Phone:   " . $phone . "\n\n";
        $emailMessage .= "Message: " . $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");
    $phoneErr   = $v->getError("phone");
    $messageErr = $v->getError("message");
    $codeErr    = $v->getError("code");
  } //end of the error check
}
// end isset
?>

and the "Your message has been sent" is built in at the top of the form is as follows:

<?php if(isset($_POST['sent'])): ?><h2>Your message has been sent</h2><?php endif; ?>

Why is the process sending to the Oops page ?

[chrisranjana]

1) Is the mail getting sent ?

2) What is in validateClass.php ?

[webiter]

Yes, the mail is being sent and being received in the mailbox.

The 'validateClass.php is as follows:

<?php

class validate {

    public $errors = array();

    /* Validate message string */
    public function validateStr($postVal, $postName, $min = 10, $max = 500) {    
        if (strlen($postVal) < intval($min)) {
            $this->setError($postName, ucfirst($postName) . " at least {$min} characters long.");
        } else if (strlen($postVal) > intval($max)) {
            $this->setError($postName, ucfirst($postName) . " less than {$max} characters long.");
        }
    }
    
/* Validate email address */
    public function validateEmail($emailVal, $emailName) {
        if (strlen($emailVal) <= 0) {
            $this->setError($emailName, "Address Required");
        } 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, "Valid Address Required");
        }
    }
    
/* Validate phone no to allow numbers only */    
    public function validatePhone($phoneVal, $phoneName) {
        if (strlen($phoneVal) <= 0) {
            $this->setError($phoneName, "Number Required"); 
        } else if (preg_match('/[^0-9]/', $phoneVal)) { 
            $this->setError($phoneName, "Valid Number Required");
        }
    }
    
/* Validate captcha entry*/    
        public function validateCode($codeVal, $codeName) {
        if (strlen($codeVal) <= 0) {
            $this->setError($codeName, "Enter Validate Code");            
        } else if(md5($codeVal) != $_SESSION['image_random_value']) {    
            $this->setError($codeName, "Valid Code Required");
        }
    }
    
/* sets an error message for a form element*/    
    private function setError($element, $message) {
        $this->errors[$element] = $message;
    }
    
/* returns the error of a single form element*/
    public function getError($elementName) {
        if ($this->errors[$elementName]) {
            return $this->errors[$elementName];
        } else {
            return false;
        }
    }
    
/* displays the errors as an html un-ordered list*/
    public function displayErrors() {
        $errorsList = "<ul class=\"errors\">\n";
        foreach ($this->errors as $value) {
            $errorsList .= "<li>" . $value . "</li>\n";
        }
        $errorsList .= "</ul>\n";
        return $errorsList;
    }
    
/* returns whether the form has errors*/
    public function hasErrors() {
        if (count($this->errors) > 0) {
            return true;
        } else {
            return false;
        }
    }
    
/* returns a string stating how many errors there were*/
    public function errorNumMessage() {
        if (count($this->errors) > 1) {
            $message = "There were " . count($this->errors) . " errors sending your message!\n";
        } else {
            $message = "Please correct the error to send your message!\n";
        }
        return $message;
    }
}
?>