How to set a global variable accessible throughout the application

Question

I developed a PHP page with global variable like this;

global $amty_imgCache; $amty_imgCache = array();
$GLOBALS[\"amty_imgCache\"]=$amty_imgCache;
         


        

Answer 1

You got something wrong.

All variables in php outside a function or class are global variables!

To use a global variable in a function and change its value use global-Keyword in the function

$amty_imgCache = array();
$amty_imgCache[] ="my_first_img.png";
function amty_getImageCacheCount() {
    global $amty_imgCache;
    echo "count is:" ,count($amty_imgCache);
}

But this storage is only per one request. If you want to store things longer use a session or a database or a file