在PHP中使用GET方法时的SESSION问题

Question

<?php session_start();?>

<a href="abc.php?color=red"> send the color </a>
<br><br>
<?php
@$_SESSION['color'] = $_GET['color'];
echo $_SESSION['color'];
?>

<br>
<br>
<a href="abc.php"> check the session variable </a>

hi, i need help for the above code.

i want to pass a variable to session.

with above code im doing this but the session variable dissappears when i refresh the page or when i click the bottom link. i want the echo $_SESSION['color']; sticky

what should i do? with regards

Answer 1

When $_GET['color'] is empty because color is not in the query string of the URL, you still assign that empty value to $_SESSION['color'].

Don't do that and the value you set won't be overwritten. Nothing was disappearing on its own.