STK push for paybill number using properties as setters

stkpush-paybill-properties.php

<?php

    require(__DIR__ . "/vendor/autoload.php");
    // or read getting started if the vendor is not available
    
    use LeviZwannah\MpesaSdk\Mpesa;

    $config = [
        "key" => "consumer Key",
        "secret" => "consumer secret",
        "code" => "business short code",
        "passkey" => "passkey for stk push"
    ];

    $mpesa = Mpesa::new()->configure($config);
    $stk = $mpesa->stk();

    $stk->phone("07123456789") // handles +2547, 07, and 2547
        ->amount(1)
        ->callback("https://callback.url")
        ->reference("A43765") // paybill account number, but still optional - defaults to payment.
        ->description("optional transaction description");

    $stk->paybill();

    $stk->push(); // or $stk();

    // check error
    $error = $stk->error();
    if($error){
        echo "Error with code: $error->code and message: $error->message occurred";
    }

    // check acceptance
    if(!$stk->accepted()){
        echo "Request not accepted. Look at the response to see";
    }

    // get the response
    $response = $stk->response();
    
    // ...
?>