Cookies With PHP

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fghfhfhfhfhgfhWhat is a Cookie?

A cookie is a function used to identify a user. it is a small file that the server save on the user’s computer. When a client send the request to the server it send cookie with the request. With the help of PHP,we can create and retrieve cookie values.

Create Cookies With PHP

A cookie is created with the setcookie() function.

Syntax

setcookie(name, value, expire, path, domain, secure, httponly);

Only the name is required. All other parameters are optional.

 PHP Create/Retrieve a Cookie

The following example creates a cookie named “user” with the value “John Doe”. The cookie will expire after 30 days (86400 * 30). The “/” means that the cookie is available in entire website (otherwise, select the directory you prefer).

We then retrieve the value of the cookie “user” (using the global variable $_COOKIE). We also use the isset() function to find out if the cookie is set:

Example

<?php
$coo_name = “user”;
$coo_value = “John Doe”;
setcookie($coo_name, $coo_value, time() + (86400 * 30), “/”); // 86400 = 1 day
?>
<html>
<body>

<?php
if(!isset($_COOKIE[$coo_name])) {
echo “Cookie named ‘” . $coo_name . “‘ is not set!”;
} else {
echo “Cookie ‘” . $coo_name . “‘ is set!<br>”;
echo “Value is: ” . $_COOKIE[$coo_name];
}
?>

</body>
</html>

Note: The cookie’s value is automatically URLencoded when sending the cookie, and automatically decoded when received (to prevent URLencoding, use setrawcookie() instead).

 Modify a Cookie Value

To modify a cookie, just set (again) the cookie using the setcookie() function:

Example

<?php
$coo_name = “user”;
$coo_value = “Alex Porter”;
setcookie($coo_name, $coo_value, time() + (86400 * 30), “/”);
?>
<html>
<body>

<?php
if(!isset($_COOKIE[$coo_name])) {
echo “Cookie named ‘” . $coo_name . “‘ is not set!”;
} else {
echo “Cookie ‘” . $coo_name . “‘ is set!<br>”;
echo “Value is: ” . $_COOKIE[$coo_name];
}
?>

</body>
</html>

 Delete a Cookie

To delete a cookie, use the setcookie() function with an expiration date in the past:

Example

<?php
// set the date to one hour ago
setcookie(“user”, “”, time() – 3600);
?>
<html>
<body>

<?php
echo “Cookie ‘user’ is deleted.”;
?>

</body>
</html>

 Check if Cookies are Enabled

The following example creates a small script that checks whether cookies are enabled. First time, it try to create a test cookie with the setcookie() function, then count the $_COOKIE array variable:

Example

<?php
setcookie(“test_cookie”, “test”, time() + 3600, ‘/’);
?>
<html>
<body>

<?php
if(count($_COOKIE) > 0) {
echo “Cookies are enabled.”;
} else {
echo “Cookies are disabled.”;
}
?>

</body>
</html>

For more details and queries please feel free to email, visit or call us. Wishing you the very best for all your future endeavors.

Helpline: 9814666333, 8699444666

Email:info@technocampus.co.in

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