Filed under: PHP
PHP $_COOKIE
This variable is often used to identify a user. This is stored on the user’s computer so that every user will be identified if who are they. You can create and get the value of a cookie.
setcookie() function
This function is used to create a cookie. This should appear before the <html> tag.
Syntax:
setcookie (name, value, expire, path, domain);
Example (create a cookie):
<?php
setcookie(“firstname”, “Bryan”, time()+7200);
?> //this should be written before the <html> tag
Here is an example on how to retrieve the value of a cookie:
<?php
echo $_COOKIE[“firstname”];
?>
isset() function
This can be used to check if a cookie has been set.
Example (using isset() function):
<html>
<body>
<?php
if (isset($_COOKIE[“firstname”]))
{
echo “You are “ . $_COOKIE[“firstname”];
}
else
{
echo “Please input your firstname”;
}
?>
</body>
</html>
You can view all cookies by this:
<?php
print_r($_COOKIE);
?>
You can delete a cookie by setting its expiration date in the past like this:
<?php
setcookie(“firstname”,””,time()-7200);
?>
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