I had the same installation problem with FA2.4.7 and XAMPP3.2.4. Failed with:

Fatal error: Uncaught Error: Class 'application' not found in C:\xampp\htdocs\frontaccounting\applications\activityevents.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\frontaccounting\applications\activityevents.php on line 12

Although the last link in your post is correct, it may have been named wrongly: FA 2.4.25 ??

I have merged my changes with current (Oct 2nd) master as one commit
https://github.com/PaulShipley/fa24/commit/3e7d2ed1d60d63b3f85654258fd07312d2e31855

and created a patch file in 
https://github.com/PaulShipley/fa24/blob/master/patches/0001-Installation-issues-with-XAMPP-3.2.2-Apache-2.4.25-P.patch

Hope this helps.

A simple shell script of sed constructs to achieve the same would be in order.

Whilst @PaulShipley's solution does the job (and degrades gracefully), the constructors can be replaced straightaway unless they are called specifically in the code as we now officially support only PHP  5+.

From the PHP Manual:

Warning:
Old style constructors are DEPRECATED in PHP 7.0, and will be removed in a future version. You should always use __construct() in new code.

Thanks @apmuthu. I wasn't sure if any of the old style constructors were being called directly and (as you say) the solution degrades gracefully for the cost of a few extra lines. A more complete fix would be to remove the old style constructors completely and correct any issues.

Hi,

I had the same installation problem with FA2.4.2 and XAMPP3.2.2. Failed with:

  Fatal error: Uncaught Error: Call to undefined function user_company() in ...

I have fixed this and many deprecated messages. My changes can be found in https://github.com/PaulShipley/fa24

Cloned from https://github.com/FrontAccountingERP/FA on 14Aug2017 (last commit 5Aug2017). Tested with Windows 10 and XAMPP 3.2.2 (Apache 2.4.25, PHP 7.1.4, MariaDB 10.1.22).

Thanks

I am trying with your updated code but i get following error when i click continue on the first installation page:

method_exists(): The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "language" of the object you are trying to operate on was loaded _before_ unserialize() gets called or provide a __autoload() function to load the class definition in G:\Web\htdocs\fac\install\isession.inc on line 128

I have resolved this by editing the isession.inc file by substituting:

$_SESSION['language']->set_language($_SESSION['language']->code);
    $GetText->add_domain( $_SESSION['language']->code, $path_to_root."/install/lang");

with this:

if(isset($_SESSION['language']))
{
    $_SESSION['language']->set_language($_SESSION['language']->code);
    $GetText->add_domain( $_SESSION['language']->code, $path_to_root."/install/lang");
}

Now I am able to proceed with the installation

From the PHP Manual:

I had the same installation problem with FA2.4.2 and XAMPP3.2.2. Failed with:

  Fatal error: Uncaught Error: Call to undefined function user_company() in ...

I have fixed this and many deprecated messages. My changes can be found in https://github.com/PaulShipley/fa24

Cloned from https://github.com/FrontAccountingERP/FA on 14Aug2017 (last commit 5Aug2017). Tested with Windows 10 and XAMPP 3.2.2 (Apache 2.4.25, PHP 7.1.4, MariaDB 10.1.22).

Thanks