PHP - Help How To Balance The Chemical Equations Via Php

Hello,

Im making a little script to keep track on how much people have currently earnt on my site.

I have everything work but i can't figure out how to work out the current balance


At the moment ive got:

Code: [Select]
$currentbalance = $row['totalpaid'] - $row['points'];
Which works untill the points becomes more then the total paid then it starts going in minus.

Im sure there's a simple fix but i just can't think of a way.

Any help would be great.
Thanks

Hi friends,
  I am creating a  site where  users can add credit  to their account via Liberty Reserve, and after  that their account  will  automatically  be updated with  the amount they added so that they can use it to purchase products.. And  after any purchase,  the amount will be subtracted from their account.. I cant  really  find a  php code  to do that... i have done  a  search on here but still cant  find anything close to it.. Can someone kindly help? Thank you

I am using a php web video script which allows Users to purchase videos successfully. The purchases are made from the amount available in the Users’ “wallet” (the User can also earn compensation, which gets added to his “balance”.). When there’s not enough available in the “wallet” for the purchase, the script checks and displays a message “not enough money”. I’d like help adding the ability where the script first checks the “wallet” amount, and if empty will then check the “balance” amount, and use a required amount from the balance, and if both are empty, then the “not enough money” appears. Here’s the portion of the code that I believe needs the modification:

// get cost video
    $db->where('name', 'video_play_price');
    $db_cost = $db->getOne('config');
    $video_cost = (float)$db_cost->value;

    $count_video = count($id_array);
    $user_id = $user->id;
    $wallet = (float)str_replace(',', '', $user->wallet);


	$amout = 0;
	foreach ($id_array as $id) {
            $video_id = (int)PT_Secure($id);

            // get video data
            $video = $db->where('id', $id)->getOne(T_VIDEOS);
			$amout += $video->video_play_price?$video->video_play_price:$video_cost;
	}

//   $amout = $video_cost * $count_video;

    $charge = ( $video_cost *0.50 );



    if ($wallet >= $amout) {

        //$new_wallet = (string)($wallet - $amout);
        $wallet = (string)($wallet - $amout);

        $db->startTransaction();

        $inserted_records = 0;
        foreach ($id_array as $id) {
            $video_id = (int)PT_Secure($id);


		// $uploader_amount = $video_cost - $charge; //100 - 20% = 80

            // get video data
            $video = $db->where('id', $id)->getOne(T_VIDEOS);



			$video_cost_new = $video->video_play_price?$video->video_play_price:$video_cost;

			$uploader_amount = ( $video_cost_new *0.50 );
            // add data to paid table
            $insert_buy = $db->insert('u_paid_videos', [
                'id_user' => $user_id,
                'id_video' => $video_id,
                'session_key' => $_SESSION['session_key'],
                'video_play_price' => (string)$video_cost,
                'video_title' => $video->title,
                'user_id_uploaded' => $video->user_id,
            ]);

            if ($insert_buy) { $inserted_records++; }
            //add wallet users' video
        $userwallet = $db->where('id', $video->user_id)->getOne(T_USERS);


        //$videouserwallet = $userwallet->balance+$video_cost;
        $videouserwallet = $userwallet->balance+$uploader_amount;
        $db->where('id', $video->user_id);
        $update_balance = $db->update(T_USERS, [
          // 'wallet' => $videouserwallet,
            'balance' => number_format($videouserwallet, 1, '.', ''),
        ]);
        }


        $db->where('id', $user_id);
        //$update_wallet = $db->update(T_USERS, [
        $update_wallet = $db->update(T_USERS, [
            'wallet' => $wallet,
        ]);


        if (($inserted_records == $count_video) && $update_wallet) {
            $db->commit();

            echo json_encode([
                'status' => 200
            ]);
            exit();
        } else {
            $db->rollback();

            echo json_encode([
                'status' => 400,
                'error' => 'Buy process error'
            ]);
            exit();
        }

    } else {

        echo json_encode([
            'status' => 400,
            'error_num' => 1,
            'error' => 'Not enough money'
        ]);
        exit();

    }

} else {

    echo json_encode([
        'status' => 400,
        'error' => 'Bad Request, Invalid or missing parameter'
    ]);
    exit();

 

Does anybody have links or scripst on a script where the user has an account with money which decreases as one purchases items.

Regards

Hello,   I designed (not coded) a finance application for windows phone 8.1 and one of the features that would be ideal is to copy your login steps in order to access your bank account automatically. Yes this does not sound safe or sane. How do I convince app users to use it?    Anyway, I want this access. My rationale is that, the login information would be stored locally and if my phone was hacked then what's the loss in my login steps being hacked... they would probably be encrypted anyway but...    The goal is to be able to open up a clone browser (eg. within the app) and then every step that you take, enter url, login credentials, security questions, pages accessed... the clone browser remembers and then later on as part of the app's function, it would automatically update your balances. I mean I suppose you could come up with the formulas, cash advance fees, interest rates, etc... but at the same time this doesn't seem to be a fixed thing... eg. hard to keep track and get the exact cent amount... or maybe I'm just bad at math   Some things in mind bitmapping, key strokes, string search, number search...    Anyway scripting came to mind, not sure if php or python but    Any thoughts?