I have PHP code that is used to add variables to a session:
<?php
session_start();
if(isset($_GET['name']))
{
$name = isset($_SESSION['name']) ? $_SESSION['name'] : array();
$name[] = $_GET['name'];
$_SESSION['name'] = $name;
}
if (isset($_POST['remove']))
{
unset($_SESSION['name']);
}
?>
<pre> <?php print_r($_SESSION); ?> </pre>
<form name="input" action="index.php?name=<?php echo $list ?>" method="post">
<input type="submit" name ="add"value="Add" />
</form>
<form name="input" action="index.php?name=<?php echo $list2 ?>" method="post">
<input type="submit" name="remove" value="Remove" />
</form>
I want to remove the variable that is shown in $list2 from the session array when the user chooses 'Remove'.
But when I unset, ALL the variables in the array are deleted.
How I can delete just one variable?
if (isset($_POST['remove'])) {
$key=array_search($_GET['name'],$_SESSION['name']);
if($key!==false)
unset($_SESSION['name'][$key]);
$_SESSION["name"] = array_values($_SESSION["name"]);
}
Since $_SESSION['name'] is an array, you need to find the array key that points at the name value you're interested in. The last line rearranges the index of the array for the next use.
To remove a specific variable from the session use:
session_unregister('variableName');
(see documentation) or
unset($_SESSION['variableName']);
NOTE:
session_unregister() has been DEPRECATED as of PHP 5.3.0 and REMOVED as of PHP 5.4.0.