Question

I’m trying to use global variable across a class.

Basically, the function render($html, $pageTitle); is called.

Within that class, exists functions such as buildHeader($pageTitle) which looks like this:

private static function addHeader($pageTitle){
    global $pageTitle;
    $html = self::capture_output('header.inc');
    return $html;
}

within header.inc, I define the variable $pageTitle as global, however, it’s not echoing the variable.

I’m also not getting errors that the variable has not been defined / initialised.

the render function calls the private methods, such as addHeader to build the page content.

Answer 1

You cover $pageTitle by function argument. Also you should rather use $_GLOBALS['pageTitle']; instead of using global which makes code more clear and helps avoid such conflicts you have. also, I quite believe you should rather move your global $pageTitle; to capture_output() function, where it seem to be used, instead of keeping it in addHeader() where it got no effect.