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  • While creating PHP login script using Javascript Ajax, Why I ain't getting response?

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    create php login script using javascript ajax ?
    i have this script for php login and i need to use ajax to login the users
    but i can not make it work i can't get response form processing page
    and i use alert function to alert response text but it's showing to me all my html code in alert
    so how can i fix it

    my code is seberated into two pages
    1- login.php
    2- login_processing.php

     

    login.php

    <?php
    require_once ("../core/initialize.php");
    ?>
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
    "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    	<head>
    		<meta charset="utf-8">
    		<meta name="viewport"  http-equiv="Content-Type" content="width=device-width, initial-scale=1">
    		<link rel="stylesheet" type="text/css" href="../style/normalize.css" />
    		<link rel="stylesheet" type="text/css" href="../style/form.css" />
    		<link rel="stylesheet" href="../style/Bootstrap-RT/css/bootstrap.rtl.css" type="text/css" />
    		<link rel="stylesheet" href="../style/Bootstrap-RTL/css/bootstrap.rtl.full.css" type="text/css" />
    
    		<title>  |  </title>
    
    	</head>
    
    	<body>
    
    		<div class="container">
    
    		<div class="login-form">
    			<div>
    				<?php if(isset($message)): ?>
    				<div class="text-center text-danger" id="error-message" >
    					<label><?php echo $message; ?></label>
    				</div>
    				<?php endif; ?>
    			</div>
    
    				<form method="post" id="login-form" name="login-form"   role="login-form">
    
    
    
    								<div class="form-group">
    									<div class="control-label">
    										<label for="username"> </label>
    									</div>
    									<div>
    										<input type="text" name="user_name" id="user_name" value=""  class="form-control" placeholder=" "  />
    									</div>
    
    								</div>
    
    								<div class="form-group">
    									<div class="control-label">
    										<label for="password"> </label>
    									</div>
    
    									<div>
    										<input type="password" name="password" id="password" value=""  class="form-control" placeholder=" "  />
    									</div>
    
    								</div>
    
    								<div class="form-group">
    
    									<div class="form-group">
    
    										<button type="submit" name="login-button" id="login-button" class="btn btn-lg btn-default btn-block"  >
    												    
    										</button>
    
    									</div>
    
    									<div class="form-group">
    
    										<label>
    											   
    											 <a href="send_email"></a>   
    										</label>
    
    									</div>
    
    									<div class="form-group">
    
    										<label>
    											   
    											 <a href="signup"></a>  
    										</label>
    
    									</div>
    
    								</div>
    
    
    
    
    				</form>
    
    			</div>
    
    		</div><!---------container---------->
    
    		<script type="text/javascript" src="../js/ajax.js"></script>
    		<script type="text/javascript" src="../js/functions.js"></script>
    		<script type="text/javascript" src="../js/jquery-3.1.1.js"></script>
    
    		<script type="text/javascript">
    	
    	function examineeLogin() {
    
    		var user_name = document.getElementById("user_name").value;
    		var password = document.getElementById("password").value;
    		var error_message = document.getElementById("error-message");
    
    		var input_parameters = "user_name=" + user_name + "&password=" + password;
    
    		var xmlhttp = new XMLHttpRequest();
    		xmlhttp.open("POST", "login_processing.php", true);
    		xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    		xmlhttp.onreadystatechange = function() {
    
    			if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
    
    				if (xmlhttp.responseText == "         ") {
    					//document.getElementById("error-message").innerHTML = "          ";
    					
    					alert(xmlhttp.responseText);
    					
    				} else {
    
    					//console.log(xmlhttp.responseText);
    					window.location.href = "../examinee/examinee_profile.php";
    					//setTimeout(' window.location.href = "../pages/main_page.php"; ',4000);
    
    				}
    
    			}
    
    		};
    
    		xmlhttp.send(input_parameters);
    
    	}
    
    	var form_submti = document.getElementById("login-form");
    	form_submti.addEventListener("submit", examineeLogin);
    		</script>
    	</body>
    </html>
    

    login_processing.php

    <?php require_once ("../core/initialize.php"); ?>
    <?php
    $form_errors = array();
    $is_valid = true ;
    $output = null;
    if (isset($_POST["user_name"]) && isset($_POST["password"])) {
    
    
    	$user_name  = trim(Functions::POST("user_name")) ;
    	$password   = trim(Functions::POST("password")) ;
    	
        $required_fields = array(
            " " => $user_name,
            " " => $password
        );
    
    
    Validation::check_empty_fields($required_fields);
    
     if(!empty(Validation::form_errors($form_errors))){
    
         $session->message(Validation::form_errors($form_errors));
         Functions::redirect_to("login.php");
         $is_valid = false ;
     }
     
     if($is_valid == true){
    	 
    	 if(Examinee::examinee_login($user_name, $password) === true ){
        
       Functions::redirect_to("../examinee/examinee_profile.php");
        
    }else{
        
        $session->message("         ");
        Functions::redirect_to("login.php");
    
    }
    	 
     }
    
    
    }// End of submit
    ?>
    
    
    
    

     

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