Php post ошибка 500

Here’s an edit to your scripts. Maybe something along the lines of this will help.

JS:

 $(function()
 {
    var url = 'php/control/LoginControl.php';
    $.post(url, {
        task: "login_verify",
        username: _username,
        password: _password
    }, function(data, status, xhr)
    {
        // success
        if(data.error===false)
            window.location = 'index.php';
        else
            $("#user_password").css({border: '1px solid #ff0000'});
    }).error(function(xhr, status, error)
    {
        console.log("Error loading page. Status: "+status+" | Error: "+error);
    });
 });

PHP:

 <?php
 // Session must be started before session checking and destroying can happen
 session_start();

 // Set error true by default
 // Error is always returned.
 // If no error, it'll be set to false in if statement
 // So a value will always be returned.
 $return['error'] = true;

 if(isset($_POST) && $_POST['task'] == 'login_verify')
 {
    require_once __DIR__.'/../class.login.php';
    if(class_exists('Login'))
    {
        $uname = $_POST['username'];
        $passwd = $_POST['password'];
        $user = Login::verifyCredentials($uname, $passwd);
        if(!empty($user))
        {
            if(isset($_SESSION))
                session_destroy();

            $_SESSION['uid'] = $user[0]->ADMIN_ID;
        }
        else
            $return['error'] = false;
    }
 }

 echo @json_encode($return);

One thing I did notice in your PHP script that I corrected in my edits, is you’re using $_SESSION and session_destroy() when no session is open. You must first define session_start() before any of the session methods or magic variables become available to you. That’s why I placed it at the very top of the PHP script.

Also, if you want to use another data type rather than json, it’s easiest just to use the $.ajax() function

 var loginData = {
    username: _username,
    password: _password,
    task: 'login_verify'
 };

 $.ajax({
    url: url,
    type: 'post',
    data: loginData,
    dataType: 'html',
    success: function(data, status, xhr)
    {
        // If page loading was a success. i.e. 200 OK status message
    },
    error: function(xhr, status, error)
    {
        // error. Status other than 200
    }
 });

======================================================================
EDIT: New Code
Take a look at this, see if this will help.

PHP:

 <?php
 $return['error'] = true;

 if(isset($_POST) && $_POST['task'] == 'login_verify')
 {
    if(!empty($_POST['formData']['username']))
    {
        if(!empty($_POST['formData']['password']))
        {
            $return['error'] = false;
            $message = "The AJAX call was successfull! The data passed is listed below.nn"
                . "task: " . $_POST['task'] . "n"
                . "username: " . $_POST['formData']['username'] . "n"
                . "password: " . $_POST['formData']['password'];

            $return['message'] = $message;
        }
        else
            $return['message'] = 'Password is empty!';
    }
    else
        $return['message'] = 'Username is empty!';
 }
 else
 {
    $return['message'] = 'Invalid request! ' . $json->task;
 }

 echo @json_encode($return);

JavaScript:

 $(function()
 {
    $("#login").click(function()
    {
        var jdata = {
            task: 'login_verify',
            formData: {
                username: $("#username").val(),
                password: $("#password").val()
            }
        }

        $.ajax({
            url: 'login.php',
            type: 'post',
            dataType: 'json',
            data: jdata,
            cache: false,
            success: function(data, status, xhr)
            {
                var dataStatus = (data.error===true) ? "Error" : "Success";
                var message = "Status: " + dataStatus + "n"
                    + data.message;

                alert(message);
            },
            error: function(xhr, status, error)
            {
                alert('Error: ' + error);
            }
        });

        return false;
    });
 });

This code, works. I have a live version of it. Exact code and all.
AJAX/PHP Example

I hope this helps

Всем привет) Делаю небольшой сайт на wordpresse. На нем имеется небольшая всплывающая форма, заполнив которую на сервер должно прийти письмо с данными формы. Реализовывал точно также на другом сайте — все работает, поставил на этом — сначала все отлично, потом вдруг перестало работать, при клике «оставить заявку» ничего не отправляется, а вылетает ошибка 500. Если кто сталкивался с такой проблемой, подскажите пожалуйста пути решения

Сам код формочки:

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<div class="popup">
    <div class="popup_bg"></div>
        <div class="form">
            <form id="send_frm" method="post" action="send.php"> <!-- method="post"> -->
                <h1 class="zak_call" >Заказать звонок</h1>
                <p>Оставьте свой номер телефона<br>и мы свяжемся с Вами</p>
                <input type="text" placeholder="* Имя..." name="fio" style="" class="frm_el cons_frm" required="">
                <input type="text" id="tel"  placeholder="* Телефон..." name="phone" style="" class="frm_el cons_frm" required="" >
                <input type="text" name="usluga" style="display:none;">                         
                <input type="submit"  value="Оставить заявку" name="submit" style="" class="btns frm_btn">
            </form>
        </div>
    </div>

Скрипт на котором вылетает ошибка:

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<script>
document.getElementById('send_frm').onsubmit = function(){
    if (this.fio.value!='' && this.phone.value!=''){
        var http = new XMLHttpRequest();
        http.open("POST", "<?php bloginfo("template_url"); ?>/send/send.php", true);
        http.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
        http.send("&fio=" + this.fio.value + "&phone=" + this.phone.value + "&usluga=" + this.usluga.value );
            http.onreadystatechange = function() {
            if (http.readyState == 4 && http.status == 200) {
            $(".popup").fadeOut();
            $(".popup2").fadeIn(1000);
    
        document.getElementById("send_frm").fio.value="";
        document.getElementById("send_frm").phone.value="";
 
            $(".popup2").delay(3000).fadeOut(1000);
    }
}
http.onerror = function() {
 
    alert('Неудачно')
    // $(".popup3").fadeIn(1000);
    // $(".popup3").delay(3000).fadeOut(1000);
}
} else {
    alert('Заполните все обязательные поля!');
}
return false;
}
</script>

И PHP обработчик:

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<?php
 
$to='4eqqqq@gmail.com'
 
$fio = $_POST['fio'];
$phone = $_POST['phone'];
$usluga = $_POST['usluga'];
 
 
$fio = htmlspecialchars($fio);
$phone = htmlspecialchars($phone);
$usluga = htmlspecialchars($usluga);
 
$fio = urldecode($fio);
$phone = urldecode($phone);
$usluga = urldecode($usluga);
 
 
 
$fio = trim($fio);
$phone = trim($phone);
$usluga = trim($usluga);
 
$subject = 'Перезвоните мне!'; //Заголовок сообщения
 
 
$message = $subject."rnИмя: ".$fio."rnТелефон: ".$phone."rnТип услуги: ".$usluga;
 
 
 
$headers  = "Content-type: text/html; charset=utf-8 rn"; //Кодировка письма
$headers  = "From: Правозащита в Кирове <from@example.com>rn";
 
// echo "NHHHHS";
 
 
if (mail($to, $subject, $message, $headers))
{     echo "сообщение успешно отправлено"; 
} else { 
    echo "при отправке сообщения возникли ошибки";
}
 
?>

Самое смешное и обидное, что сначала то все работало, и не один день, а пару недель примерно. Может я случайно, где то стер какую-нибудь точку, не знаю. Во вложении скрин с ошибкой.

There were 2 errors in your code actually.

1) The dot at the end of:

$email_body = "You have received a new message from the user $name.n".
" Here are the details:n Name: $name n Email: $email n Purchase Code n    $purchasecode n Vendor n $vendor";.

Which needs to be replaced by:

$email_body = "You have received a new message from the user $name.n".
" Here are the details:n Name: $name n Email: $email n Purchase Code n    $purchasecode n Vendor n $vendor";

2) The Submit button was not named, therefore it would always show the error message error; you need to submit the form even when the form was successfully sent.

Solution:

<button type="submit" name="submit" id="submitbutton" value="Submit" class="mainButton">SUBMIT</button><br>

Fully tested code

HTML form

<div id="emailform">
<h2>Confirm your purchase information</h2>
<hr>
<form method="post" name="contactform" action="mail_form.php">
<p>
<label for='name'>Your Name:</label> <br>
<input type="text" name="name">
</p>
<p>
<label for='email'>Email Address:</label> <br>
<input type="text" name="email">
</p>
<p>
<label for='purchasecode'>Purchase Code:</label> <br>
<input type="text" name="purchasecode">
</p>
<p>
<label for='vendor'>Vendor Name:</label> <br>
<select name="vendor">
  <option value="1" selected="selected"></option>
  <option value="2" >Amazon</option>
  <option value="3" >Barnes &amp; Noble</option>
  <option value="4" >Family Christian</option>
  <option value="5" >Christianbook.com</option>
  <option value="6" >LifeWay</option>
  <option value="7" >Books-A-Million</option>
  <option value="8" >Mardel</option>
</select>
</p>
<button type="submit" name="submit" id="submitbutton" value="Submit" class="mainButton">SUBMIT</button><br>
</form>

PHP handler

<?php
if(!isset($_POST['submit']))
{
  //This page should not be accessed directly. Need to submit the form.
  echo "error; you need to submit the form!";
}
$name = $_POST['name'];
$email = $_POST['email'];
$purchasecode = $_POST['purchasecode'];
$vendor = $_POST['vendor'];


//Validate first
if(empty($_POST['name'])  ||
   empty($_POST['email']) ||
   empty($_POST['purchasecode']) ||
   empty($_POST['vendor']))
{
    echo "All fields are required.";
exit;
}

if(IsInjected($visitor_email))
{
    echo "Bad email value!";
    exit;
}

$email_from = $email;
$email_subject = "New Form submission";
$email_body = "You have received a new message from the user $name.n".
    " Here are the details:n Name: $name n Email: $email n Purchase Code n    $purchasecode n Vendor n $vendor";

$to = "name@domain.com";//<== update the email address

$headers = "From: $email_from rn";
$headers .= "Reply-To: $email_from rn";
//Send the email!
mail($to,$email_subject,$email_body,$headers);
//done. redirect to thank-you page.
header('Location: index.html');

// echo "success";


// Function to validate against any email injection attempts
function IsInjected($str)
{
  $injections = array('(n+)',
              '(r+)',
              '(t+)',
              '(%0A+)',
              '(%0D+)',
              '(%08+)',
              '(%09+)'
              );
  $inject = join('|', $injections);
  $inject = "/$inject/i";
  if(preg_match($inject,$str))
    {
    return true;
  }
  else
    {
    return false;
  }
}

?>

There were 2 errors in your code actually.

1) The dot at the end of:

$email_body = "You have received a new message from the user $name.n".
" Here are the details:n Name: $name n Email: $email n Purchase Code n    $purchasecode n Vendor n $vendor";.

Which needs to be replaced by:

$email_body = "You have received a new message from the user $name.n".
" Here are the details:n Name: $name n Email: $email n Purchase Code n    $purchasecode n Vendor n $vendor";

2) The Submit button was not named, therefore it would always show the error message error; you need to submit the form even when the form was successfully sent.

Solution:

<button type="submit" name="submit" id="submitbutton" value="Submit" class="mainButton">SUBMIT</button><br>

Fully tested code

HTML form

<div id="emailform">
<h2>Confirm your purchase information</h2>
<hr>
<form method="post" name="contactform" action="mail_form.php">
<p>
<label for='name'>Your Name:</label> <br>
<input type="text" name="name">
</p>
<p>
<label for='email'>Email Address:</label> <br>
<input type="text" name="email">
</p>
<p>
<label for='purchasecode'>Purchase Code:</label> <br>
<input type="text" name="purchasecode">
</p>
<p>
<label for='vendor'>Vendor Name:</label> <br>
<select name="vendor">
  <option value="1" selected="selected"></option>
  <option value="2" >Amazon</option>
  <option value="3" >Barnes &amp; Noble</option>
  <option value="4" >Family Christian</option>
  <option value="5" >Christianbook.com</option>
  <option value="6" >LifeWay</option>
  <option value="7" >Books-A-Million</option>
  <option value="8" >Mardel</option>
</select>
</p>
<button type="submit" name="submit" id="submitbutton" value="Submit" class="mainButton">SUBMIT</button><br>
</form>

PHP handler

<?php
if(!isset($_POST['submit']))
{
  //This page should not be accessed directly. Need to submit the form.
  echo "error; you need to submit the form!";
}
$name = $_POST['name'];
$email = $_POST['email'];
$purchasecode = $_POST['purchasecode'];
$vendor = $_POST['vendor'];


//Validate first
if(empty($_POST['name'])  ||
   empty($_POST['email']) ||
   empty($_POST['purchasecode']) ||
   empty($_POST['vendor']))
{
    echo "All fields are required.";
exit;
}

if(IsInjected($visitor_email))
{
    echo "Bad email value!";
    exit;
}

$email_from = $email;
$email_subject = "New Form submission";
$email_body = "You have received a new message from the user $name.n".
    " Here are the details:n Name: $name n Email: $email n Purchase Code n    $purchasecode n Vendor n $vendor";

$to = "name@domain.com";//<== update the email address

$headers = "From: $email_from rn";
$headers .= "Reply-To: $email_from rn";
//Send the email!
mail($to,$email_subject,$email_body,$headers);
//done. redirect to thank-you page.
header('Location: index.html');

// echo "success";


// Function to validate against any email injection attempts
function IsInjected($str)
{
  $injections = array('(n+)',
              '(r+)',
              '(t+)',
              '(%0A+)',
              '(%0D+)',
              '(%08+)',
              '(%09+)'
              );
  $inject = join('|', $injections);
  $inject = "/$inject/i";
  if(preg_match($inject,$str))
    {
    return true;
  }
  else
    {
    return false;
  }
}

?>