Image resize script alternative WeBid 1.2.* ONLY

pani100 submitted a new resource:

Image resize script alternative - Replaces stock image resize script with mThumb

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Welcome to the New Year 2018
I have a question for Pani100 how to change the code below in the file getthumb php in order to make the image in format e w = 400px h = 300px
if (isset($_GET['fromfile'])) { $_GET['src'] = $_GET['fromfile']; }
if (isset($_GET['w'])) { $_GET['h'] = $_GET['w']; }
$_GET['zc'] = '2'; // can be 1 , 2 or 3

 

this applies, of course, to the background size

 

As much as we appreciate contributions like this, it would be helpful to consider that not all of us are even remotely trained in PHP code. It would be nice if you could change the installation instructions for dummies like me. Fore instance, exactly where to insert or what piece of code to replace with the recommended code.

Can you perhaps help as I am not sure what code to replace with yours or where to insert. I can cut and paste or insert............at least.

 

Here is the ready file getthumb.php to download after changing the format of the background to the format 4: 3 400px x 300px

 

I work well in version 1.2

 

Thank You. Appreciated.