Calculate Paypal fees

Ah, Paypal fees. Every person who ever used the popular online payment service had to pay their fees. So what about a PHP function to easily calculate the fee for a specific amount?

01.function paypalFees($sub_total, $round_fee) {
02.
03.// Set Fee Rate Variables
 
04.$fee_percent = '3.4'; // Paypal's percentage rate per transaction (3.4% in UK)
 
05.$fee_cash    = '0.20'; // Paypal's set cash amount per transaction (£0.20 in UK)
 
06.
07.// Calculate Fees
 
08.$paypal_fee = ((($sub_total / 100) * $fee_percent) + $fee_cash);
 
09.
10.if ($round_fee == true) {
11.$paypal_fee = ceil($paypal_fee);
12.}
13.
14.// Calculate Grand Total
15.$grand_total = ($sub_total + $paypal_fee);
16.
17.// Tidy Up Numbers
18.$sub_total   = number_format($sub_total, 2, '.', ',');
19.$paypal_fee = number_format($paypal_fee, 2, '.', ',');
20.$grand_total = number_format($grand_total, 2, '.', ',');
21.
22.// Return Array
 
23.return array('grand_total'=>$grand_total, 'paypal_fee'=>$paypal_fee, 'sub_total'=>$sub_total);
 
24.}

» Credits: Snipplr

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Type::#type/snippet Origin:: 10 super useful PHP snippets - CatsWhoCode.com Language:: PHP