I have a directory, under it there are two php files index.php, index2.php:
in the index.php:
<?php
$_COOKIE['constant_a']='A';
echo($_COOKIE['constant_a']);
in the index2.php:
<?php
echo($_COOKIE['constant_a']);
Firstly, I access the http://localhost:63342/htdocs/index.php, the browser will show the A.
but then I input the index2.php, http://localhost:63342/htdocs/index2.php: there print Undefined Error:
Notice: Undefined index: constant_a in /Users/sof/Desktop/htdocs/index.php on line 12
Why it do not shows the A?
You should use setcookie instead of $_COOKIE['constant_a']='A' as:
setcookie('constant_a', 'A');