POST - 500 (internal server error ) - php

Question

In my case I am sending POST request by $.post using JQuery and PHP.
But I am gettinh this error in while posting data.
POST https://xxxxxxxxxxxxx/xxxxxxxxxxx/php/control/LoginControl.php 500 (Internal Server Error)
here is my jquery code :
var url = 'php/control/LoginControl.php';
$.post(url,
{
task : "login_verify",
username:_username ,
password:_user_password,
})
.error(function(er){
console.log(er);
})
.success(
function(data){
if(data == true){
window.location = 'index.php';
}else{
$("#user_password" ).css({border:'1px solid red'});
}
}
);
PHP - LoginControl.php
<?php
try{
if(isset($_POST) && $_POST['task'] == 'login_verify'){
$user_name = $_POST['username'];
$password = md5($_POST['password']);
require '../class/login.php';
if(class_exists('Login')){
$user = Login::verifyCredentials($user_name,$password);
if($user != NULL){
if(isset($_SESSION)){
session_destroy();
}
session_start();
$_SESSION['uid'] = $user[0]->ADMIN_ID;
echo true;
}else{
echo false;
}
}
}
} catch (Exception $ex){
echo $ex;
}
?>
note: I deploy successfully this code on live test server. and it is completely working fine. But on new server I am getting this error. I am using SSL on this new server this might be issue.
Please comment if its not enough information.
Please help.

Answer 1

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.\n\n"
. "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