valid.php.diff

Sean o -, 03/28/2009 02:24 am

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trunk/system/helpers/valid.php (working copy)
161 161 
		for ($i = $length - 1; $i >= 0; $i -= 2)
162 162 
		{
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			// Add up every 2nd digit, starting from the right
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			$checksum += substr($number, $i, 1);
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			$checksum += $number[$i];
165 165 
		}
166 166 

  		





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		for ($i = $length - 2; $i >= 0; $i -= 2)

  		





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		{

  		





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			// Add up every 2nd digit doubled, starting from the right

  		





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			$double = substr($number, $i, 1) * 2;

  		





  
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			$double = $number[$i] * 2;

  		





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			// Subtract 9 from the double where value is greater than 10

  		





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			$checksum += ($double >= 10) ? $double - 9 : $double;