PHP: Barfy Old Authorize.net Procedural PHP Gross

gistfile1.txt

<?php

$required_fields = array(
	'page_id' => 'page_id',
	'Amount' => 'cc_amount',
	'Credit Card Number' => 'cc_card_num',
	'Credit Card Expiration Date' => 'cc_exp_date',
	'Description' => 'cc_description'
);

function verify_data_present($required_fields) {

	$errors = array();

	if(empty($_POST)) { // Ensure we have some data
		die("<strong>No Post! Nothing to send to Authorize.net</strong>");
	}

	// Make sure that all of the required fields exist as keys in the post array

	foreach($required_fields as $key => $value) {
		if(!in_array($value, array_keys($_POST))) {
			$errors[] = $value . " does not exist in post data and is required!";
		} else {
			if(empty($_POST[$value])) {
				$errors[] = $key . " is a required field.";
			}
		}
	}

	if(!is_numeric($_POST['cc_card_num'])) $errors[] = "Card number must be numeric!";

	if(!is_numeric($_POST['cc_amount'])) $errors[] = "Amount must be a decimal of form x.xx without the dollar sign!";

	if(!empty($errors)) {
		echo "<div><ul>"; 
			foreach($errors as $value) {
				echo "<li>" . $value . "</li>"; 
			} 
		echo "</ul></div>"; 
		return false;
	} else { 
		return true; 
	}

	if(!verify_data_present($required_fields)) { 
		die(); 
	} else { 
		include('gateway.php'); 
		echo "<div class='approved'>Your transaction has been approved.</div>";
	}
} 

?>