Checking and setting cookie in a function
Question
I wrote a function that checks if a cookie is set, if not set then it sets the cookie.
Because the cookie is not available straight away, I need to refresh the page once, so I have access to the value.
However, when I am calling the function it just keeps reloading the page. When outside of the function it works correctly. Only when it is inside a function and I call it does it occurs.
function getCookie (){
if(isset($_COOKIE['ID'])){
$cookieID = $_COOKIE['ID'];
}
else{
//generate random value for cookie id
$charid = strtoupper(md5(uniqid(rand(), true)));
$uuid = substr($charid, 0, 8)
.substr($charid,20,12);
setcookie( "ID", $uuid, strtotime( '+7 days' ) );
$cookieID = $_COOKIE['ID'];
echo "<META HTTP-EQUIV='Refresh' CONTENT='0'> ";
}
echo $cookieID;
}
2 answers
solution1
2 2013-04-24 10:21:10
Here's a working php page...
<?php
function getCookie (){
if(isset($_COOKIE['ID'])){
$cookieID = $_COOKIE['ID'];
}
else{
//generate random value for cookie id
$charid = strtoupper(md5(uniqid(rand(), true)));
$uuid = substr($charid, 0, 8)
.substr($charid,20,12);
setcookie( "ID", $uuid, strtotime( '+7 days' ) );
$cookieID = $_COOKIE['ID'];
//just assign the cookie the value as if it was in the header.
//no refresh needed.
$_COOKIE['ID'] = $uuid;
}
}
?>
<html>
<body>
<?php
getCookie();
echo $_COOKIE['ID'];
?>
</body>
</html>
solution2
0 2013-04-24 10:29:56
Check what excacly isset returns. From Your description seems that simply no cookie is set after first execution of this code. In FireFox You can chcek if cookie is set using firebug tool.
A good idea is to compare also a type of data in any if for excample if(isset($some_var) === true){ instead of if(isset($some_Var)){ . Remember that:
$v = 0;
if($v == 0){ } returns true
if($v === 0){ } returns true
if($v == false){ } returns true
if($v === false){ } return false
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