Paya Connect - Hosted Payment Page PHP Sample - includes custom fields

index.php

<?php
/*----------------------------------------------
Author: SDK Support Group
Company: Paya
Contact: sdksupport@paya.com
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!! Samples intended for educational use only!!!
!!!        Not intended for production       !!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-----------------------------------------------*/   

    require('shared.php');
    
    $id = $hpp['ID'];
    $timestamp = time();
    
    // Custom request for HPP.
    $req = [
		"id" => $id,
    "field_configuration" => [
        "body" => [
            "fields" => [
                [
                  "id" => "transaction_amount",
                  "value" => 7.00,
                  "label" => "Amount",
                  "readonly" => true,
                  "visible" => true
                ],
                [
                  "id" => "action",
                  "value" => "sale",
                  "visible" => false
                ],
                [
                  "id" => "order_num",
                  "value" => "SDK_TEST_INVOICE " . $timestamp,
                  "label" => "",
                  "readonly" => true,
                  "visible" => false
                ],
                [
                  "id" => "description",
                  "value" => "SDK Test Auth" . $timestamp,
                  "label" => "",
                  "readonly" => true,
                  "visible" => false
                ],
                [
                  "id" => "transaction_api_id",
                  "value" => "SDKTEST" . $timestamp,
                  "label" => "",
                  "readonly" => true,
                  "visible" => false
                ],
                [
                  "id" => "billing_street",
                  "value" => "123 Main St",
                  "label" => "Billing Street",
                  "readonly" => false,
                  "visible" => true
                ],
                [
                  "id" => "billing_city",
                  "value" => "Savannah",
                  "label" => "Billing City",
                  "readonly" => false,
                  "visible" => true
                ],
                [
                  "id" => "billing_state",
                  "value" => "GA",
                  "label" => "Billing State",
                  "readonly" => false,
                  "visible" => true
                ],
                [
                  "id" => "billing_zip",
                  "value" => "31405",
                  "label" => "Billing Zip",
                  "readonly" => false,
                  "visible" => true
                ],
                [
                  "id" => "save_account",
                  "value" => true,
                  "visible" => false
                ],
                [
                  "id" => "save_account_title",
                  "value" => "Primary Card",
                  "visible" => false
                ]
              ]
        ]
    ],
    "redirect_url_on_approve" => "https://google.com",
		"redirect_url_on_decline" => "https://google.com"
    ];
    
  // Encode the request details
 	$sReq = json_encode($req);
 	$data = getEncodedData($sReq, $hpp['KEY']);
  
  
    
?>

   
<!--Create a page to display the payment link.-->
<style>
    a {
        display:inline-block;
        background-color:#428bca;
        border-color:#357ebd;
        border-radius:5px;
        border-width:0;
        border-style:none;
        color:#ffffff;
        font-size:12px;
        height:30px;
        width:100px;
        margin:0px;
        padding:7px;
        text-decoration:none;
        text-align:center;
    }
</style>

<div>
    <h1>Paya Connect Hosted Payment Page</h1>
    <br />
    <!--Build the payment link.-->
    <a href="https://api.sandbox.payaconnect.com/hostedpaymentpage?id=<?= $id ?>&data=<?= $data ?>" type="button">Pay Now</a>




</div>

shared.php

<?php
/*----------------------------------------------
Author: SDK Support Group
Company: Paya
Contact: sdksupport@paya.com
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!! Samples intended for educational use only!!!
!!!        Not intended for production       !!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-----------------------------------------------*/    
    
    // This is the Hosted Payment Page ID and Encryption Key.
    // These are provided when you setup an HPP under a location.
    $hpp = [
        "ID" => "[HPP ID]",
        "KEY" => "[HPP Hash Key]"
    ];
    
    // Function to encrypt/encode data.
    function getEncodedData($toBeHashed, $password){
        $salt = openssl_random_pseudo_bytes(8);


        $salted = '';
        $dx = '';
        
        while (strlen($salted) < 48) {
            $dx = md5($dx . $password . $salt, true);
            $salted .= $dx;
        }
        
        $key = substr($salted, 0, 32);
        $iv = substr($salted, 32, 16);
        
        // Encrypt the JSON object using the encryptionKey
        $encryptedString = openssl_encrypt($toBeHashed, 'aes-256-cbc', $key, true, $iv);

        
        $encodedEncryptedString =  urlencode(base64_encode("Salted__" . $salt . $encryptedString));
        
        
        return $encodedEncryptedString;
    }
    
    // Function to write debug information to console.
    function debug_to_console( $data ) {
        $output = $data;
        if ( is_array( $output ) )
            $output = implode( ',', $output);
    
        echo "<script>console.log( 'Debug Objects: " . $output . "' );</script>";
    }
    

    
?>