while setting cookies getting error of undefined index - php

Question

<script>
$(document).ready(function(){
setTimeout(function(){
if(!mag_cookie_val)
$("#myNav").show();
}, 12000);
$("#close_magnet").click(function(){
$("#myNav").hide();
});
$("#magnet_email").keyup(function(){
$("#magnet_email").css("border-color","#67AEE9");
});
$("#magnet_continue").click(function(){
var MagEmail = $("#magnet_email").val();
atpos = MagEmail.indexOf("#");
dotpos = MagEmail.lastIndexOf(".");
if(atpos < 1 || ( dotpos - atpos < 2 ))
{
$("#magnet_email").css("border-color","red");
}else{
/*
$.ajax({
url: "leadmagnet_res.php",
method: 'POST',
data:{magemail:MagEmail}
}).done(function(data) {
//alert(data)
if(data !=0){
$("#myNav").css("height","0%");
}
});
*/
$.ajax({
url: 'leadmagnet_res.php',
type: 'post',
data: {magemail:MagEmail},
//processData: false,
success: function( res ){
//alert(res);
},
error: function(){
alert( "error occured" );
},
complete: function(){
$("#myNav").hide();
}
});
}
});
//Lead magnet close code End
$(document).ready(function() {
//setTimeout(function(){ $("#myNav").show(); }, 12000);
$("#magnet_email").css("border-color","#67AEE9");
//Lead magnet close code start
$("#close_magnet").click(function(){
$("#myNav").css("height","0%");
});
$("#magnet_email").keyup(function(){
$("#magnet_email").css("border-color","#67AEE9");
});
$("#magnet_continue").click(function(){
var MagEmail = $("#magnet_email").val();
atpos = MagEmail.indexOf("#");
dotpos = MagEmail.lastIndexOf(".");
if(atpos < 1 || ( dotpos - atpos < 2 ))
{
//alert(1);
$("#magnet_email").css("border-color","red");
}else
{
//alert(2);
$.ajax({
url: siturl_mag+"leadmagnet_res.php",
method: 'POST',
data:{magemail:MagEmail}
}).done(function(data) {
//alert(data)
if(data !=0){
$("#myNav").css("height","0%");
}
});
}
});
//Lead magnet close code End
</script>
<style>
.overlay_magnet {
height: 0% !important;
width: 100% !important;
position: fixed !important;
z-index: 94 !important;
top: 0;
left: 0;
background-color: rgb(0,0,0);
background-color: rgba(0,0,0, 0.3);
transition: 0.5s;
}
.overlay_magnet-content {
margin-left: 27%;
margin-top: 30px;
position: relative;
text-align: center;
top: 0;
width: 45%;
}
.overlay_magnet a {
padding: 8px;
text-decoration: none;
font-size: 36px;
color: #818181;
display: block;
transition: 0.3s;
}
.overlay_magnet a:hover, .overlay a:focus {
color: #f1f1f1;
}
.overlay_magnet .closebtn {
position: absolute;
top: 20px;
right: 45px;
font-size: 60px;
}
#media screen and (max-height: 450px) {
.overlay_magnet {}
.overlay_magnet a {font-size: 20px}
.overlay_magnet .closebtn {
font-size: 40px;
top: 15px;
right: 35px;
}
}
.circle_magnet {
width: 100%;
padding: 10%;
background: white;
border-radius: 50px;
border-style: solid;
border-color: #FE0000;
border-width:4px;
}
.circle_magnet-wrapper {
margin: 0 5%;
position: relative;
}
.circle_magnet .list-inline {
font-size: 0px;
margin: 0;
}
.circle_magnet .list-inline li {
font-size: 20px;
display: block;
}
.circle_magnet p {
padding-top: 10%;
margin: 0;
}
#media (min-width:460px) {
.circle_magnet .list-inline li {
font-size: 50px;
display: inline-block;
}
.circle_magnet-wrapper {
width: 100%;
position: relative;
margin:0 auto;
}
.circle_magnet {
height: 0px;
padding: 50%;
border-radius: 50%;
}
.circle_magnet > div {
position: absolute;
text-align: center;
left: 10%;
right: 10%;
top: 50%;
-webkit-transform: translateY(-50%);
-ms-transform: translateY(-50%);
transform: translateY(-50%);
top:20%\9; /* ie8 hack test this out it's a guess */
}
}
.circle_text_magnet{
cursor:pointer;
}
.circle_text_magnet:hover {
text-decoration: underline;
}
.arrow{
height:25px;
width:25px;
}
</style>
<div id="myNav" class="overlay_magnet hidden-xs hidden-sm" <?php if ($magstatus !=0){?>style="height:0% !important;display:none;" <?php }else{ ?>style="height:100% !important;display:none;" <?php } ?> >
<div class="overlay_magnet-content" >
<div class="circle_magnet-wrapper">
<div class="circle_magnet text-center">
<div class="row" style="margin-top:-40%;">
<div class="col-md-12">
<center>
<label style="font-family: Roboto;color: green;text-shadow: rgb(46, 46, 46) 0px 4px 5px;font-size: 42px;font-weight: bold !important;margin: 0 !important;">Sign Up!</label>
</center>
</div>
</div>
<div class="row" style="margin-top:-24%;">
<div class="col-md-12">
<center>
<label style="font-family: Roboto;color: #00006A;font-size: 20px;font-weight: normal !important;margin: 0 !important;">Join our Travel Community.</label>
<label style="font-family: Roboto;color: #00006A;font-size: 20px;font-weight: normal !important;margin: 0 !important;">Get Free Exclusive Travel Tips and<br> Links to our New Travel Videos.</label>
</center>
</div>
</div>
<div class="row" style="margin-top:-12%;">
<div class="col-md-12">
<center>
<label style="font-family: Roboto;color: #fe0000;font-size: 20px;font-weight: normal !important;margin: 0 !important;">Enter your email below</label>
</center>
</div>
</div>
<div class="row" >
<div class="col-md-12" style="border: 1px solid #00006A;border-radius: 7px;padding: 18px;box-shadow: inset 0px 0px 50px 0px #ABABAB, 0px 2px 9px 1px #242424;">
<div class="col-md-9">
<input id="magnet_email" class="form-control" placeholder="Enter your email address " type="text" >
</div>
<div class="col-md-3" >
<button class="btn btn-primary pull-left " id="magnet_continue">Continue</button>
</div>
</div>
</div>
<div class="row" style="margin-top:20%;">
<div class="col-md-12">
<span style="font-family: Roboto;color: #00006A;font-size: 12px;font-weight: normal !important; ">By clicking Continue, I agree to the </span>
<span> Terms of Service</span>
</div>
</div>
<div class="row" style="margin-top:35%;">
<div class="col-md-12">
<center><h2 id="close_magnet" class="circle_text_magnet" style="font-family: Roboto;color: #00006A;font-weight: normal !important; margin-left:10px; ">No Thanks</h2></center>
</div>
</div>
</div>
</div>
</div>
this is a code of cookies which i m setting for a form to be displayed
but always getting a error of Undefined
index: MagnetStatus in line 3
which is
$magstatus = $_COOKIE[$cookie_name];
code:
$magstatus = $_COOKIE[$cookie_name];
if(!$magstatus) {
$cookie_value = 0;
setcookie($cookie_name, $cookie_value, time() + (86400 * 30), "/"); // 86400 = 1 day
}
?>
so can u help me out or any idea regarding this

Answer 1

you can either use isset() or empty() to prevent such warnings if the cookie with the specified name doesnt exist
$magstatus = (isset($_COOKIE[$cookie_name])) ? $_COOKIE[$cookie_name] : 'default_value_here';

Answer 2

You have to use following code to check whether cookie is set or not:
if(!isset($_COOKIE[$cookie_name])) {
$cookie_value = 0;
setcookie($cookie_name, $cookie_value, time() + (86400 * 30), "/"); // 86400 = 1 day
}
Remove $magstatus = $_COOKIE[$cookie_name]; line only check cookie with isset method