args = [
    // Enter the reference code here.
    string	$referenceCode				=>	"payment_test_00000001",
    // Enter the description here.
    string	$description    			=>	"payment test",
    // Enter the value here.
    string	$amount          			=>	"20000",
    // Enter the value of the VAT (Value Added Tax only valid for Colombia) of the transaction,
    // if no VAT is sent, the system will apply 19% automatically. It can contain two decimal digits.
    // Example 19000.00. In case you have no VAT you should fill out 0.
    string	$tax             			=>	"3193",
    // Enter the value of the base value on which VAT (only valid for Colombia) is calculated.
    // If you do not have VAT should be sent to 0.
    string	$taxReturnBase				=>	"16806",
    // Enter the currency here.
    string	$currency        			=>	"COP",
    // Enter the name of the buyer here.
    string	$buyerName    				=>	"First name and second buyer name",
    // Enter the email of the buyer here.
    string	$buyerEmail      			=>	"[email protected]",
    // Enter the telephone number of the buyer here.
    string	$buyerPhone      			=>	"7563126",
    // Enter the contact document of the buyer here.
    string	$buyerDocument   			=>	"5415668464654",
    // Enter the name of the payer here.
    string	$payerName   				=>	"APPROVED",
    // Enter the email of the payer here.
    string	$payerEmail      			=>	"[email protected]",
    // Enter the telephone number of the payer here.
    string	$payerPhone      			=>	"7563126",
    // Enter the contact document of the payer here.
    string	$payerDocument   			=>	"5415668464654",
    // Enter the address of the payer here.
    string	$shippingAddress			=>	"calle 100",
    string	$shippingCity				=>	"Bogota",
    string	$shippingState				=>	"Bogota",
    string	$shippingCountry			=>	"CO",
    string	$shippingPostalCode			=>  "000000",
    // Enter the number of credit card here.
    string	$cardNumber					=>	"4097440000000004",
    // Enter the expiration date of the credit card here.
    string	$cardExpirationDate			=>	"2020/12",
    // Enter the security code of the credit card here.
    string	$cardSecurityCode			=>	"321",
    // Enter the credit card name here. 
    // VISA||MASTERCARD||AMEX||DINERS
    string	$paymentMethod				=>	"VISA",
    // Enter the number of installments here.
    string	$installments				=>	"1",
  ]

  args = [
    // Enter the reference code here.
    string	$referenceCode				=>	"payment_test_00000001",
    // Enter the description here.
    string	$description				=>	"payment test",
    // Enter the value here.
    string	$amount						=>	"20000",
    // Enter the value of the VAT (Value Added Tax only valid for Colombia) of the transaction,
    // if no VAT is sent, the system will apply 19% automatically. It can contain two decimal digits.
    // Example 19000.00. In case you have no VAT you should fill out 0.
    string	$tax						=>	"3193",
    // Enter the value of the base value on which VAT (only valid for Colombia) is calculated.
    // If you do not have VAT should be sent to 0.
    string	$taxReturnBase				=>	"16806",
    // Enter the currency here.
    string	$currency					=>	"COP",
    // Enter the buyer's email here.
    string	$buyerEmail					=>	"[email protected]",
    // Enter the payer's name here.
    string	$payerName					=>	"First name and second payer name",
    // Enter the payer's email here.
    string	$payerEmail					=>	"[email protected]",
    // Enter the payer's contact phone here.
    string	$payerPhone					=>	"7563126",
    // Enter the bank PSE code here.
    string	$pseBank					=>	"1007",
    // Enter the person type here (Natural or legal).
    string	$personType					=>	"N",
    // Enter the payer's contact document here.
    string	$payerDocument				=>	"123456789",
    // Enter the payer’s document type here: CC, CE, NIT, TI, PP,IDC, CEL, RC, DE.
    string	$payerDocumentType			=>	"CC",
  ]