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Another way to calculate age, given a MySQL date format

/ Published in: PHP
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  1. function calculateAge ($birthdate)
  2. {
  3. 	$bdt = strtotime($birthdate);
  4.  
  5. 	if (false === $bdt || -1 === $bdt) {
  6. 		return 0;
  7. 	}
  8.  
  9. 	$birthDateParts = getdate($bdt);	
  10. 	$todayDateParts = getdate();
  11.  
  12. 	$nYear = $todayDateParts['year'] - $birthDateParts['year'];
  13. 	$nMonth = $todayDateParts['mon'] - $birthDateParts['mon'];
  14. 	if ($nMonth < 1) {
  15. 		if ($nMonth == 0) {
  16. 			$nDay = $todayDateParts['mday'] - $birthDateParts['mday'];
  17. 			return ($nDay < 0) ? ($nYear - 1) : $nYear;
  18. 		}
  19.  
  20. 		return ($nYear - 1);
  21. 	}
  22.  
  23. 	return $nYear;
  24. }

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