Function returns array - how to access values?

[bunner_bob]

I found a set of functions for validating credit card numbers. The main function returns an array, and I'm not sure how to get at that array - I don't even know what the array is named. The code looks like this:

function clean_no ($cc_no) 
{ 
	// Remove non-numeric characters from $cc_no 
	return ereg_replace ('[^0-9]+', '', $cc_no); 
} 

function identify ($cc_no) 
{ 
	$cc_no = clean_no ($cc_no); 

// Get card type based on prefix and length of card number 
if (ereg ('^4(.{12}|.{15})$', $cc_no)) 
	return 'Visa'; 
if (ereg ('^5[1-5].{14}$', $cc_no)) 
	return 'Mastercard'; 
if (ereg ('^3[47].{13}$', $cc_no)) 
	return 'American Express'; 
if (ereg ('^3(0[0-5].{11}|[68].{12})$', $cc_no)) 
	return 'Diners Club/Carte Blanche'; 
if (ereg ('^6011.{12}$', $cc_no)) 
	return 'Discover Card'; 
if (ereg ('^(3.{15}|(2131|1800).{11})$', $cc_no)) 
	return 'JCB'; 
if (ereg ('^2(014|149).{11})$', $cc_no)) 
	return 'enRoute'; 

	return 'unknown'; 
} 

function validate ($cc_no) 
{ 
	// Reverse and clean the number 
	$cc_no = strrev(clean_no($cc_no));
	// VALIDATION ALGORITHM 
	// Loop through the number one digit at a time 
	// Double the value of every second digit (starting from the right) 
	// Concatenate the new values with the unaffected digits 
	for ($ndx = 0; $ndx < strlen($cc_no); ++$ndx)
		$digits .= ($ndx % 2) ? $cc_no[$ndx] * 2 : $cc_no[$ndx];
	// Add all of the single digits together 
	for ($ndx = 0; $ndx < strlen($digits); ++$ndx)
		$sum += $digits[$ndx];

// Valid card numbers will be transformed into a multiple of 10 
return ($sum % 10) ? FALSE : TRUE;
}

function check($cc_no) 
{ 
	$valid = validate($cc_no); 
	$type__= identify($cc_no); 
	return array($valid, $type, 'valid' => $valid, 'type' => $type); 
}

And I've made it this far:

if (check($_POST['cardnum']) == true) {
echo "Card is valid, type is " . $type;
} else {
echo "Card is not valid.";
}

But $type isn't getting anything - I think I'm going about this the wrong way. I need the "card is valid" message if the $valid portion of the function is true, but I think I'm getting a result based on whether the overall function is true. Something like that.

I'm out of my depth here...

[diego25]

Store it in a variable:

$result = check($_POST['cardnum']);

if ($result['valid']) {
print "Valid";
} else {
print "Thief!";
}

Diego

[bunner_bob]

Thanks - perfect!

Boy, I must say it's difficult working with code copied and pasted from html pages. All sorts of illegal space characters get copied over and my text edit program (BBEdit) doesn't seem to catch them.

Is there a standard(ish) process for cleaning up code copied and pasted from html pages? Or any suggestions?

[mahers]

Is there a standard(ish) process for cleaning up code copied and pasted from html pages? Or any suggestions?

I have had this happen to me as well. I find saving the HTML document with the code on it as ".txt" then copying/pasting from the saved text file works.