How to calculate age based on birthday in php

php method to calculate age based on birthday.

The example in this article describes how PHP calculates age based on birthday. Share it with everyone for your reference. The details are as follows:

<?php 
function birthday($birthday){ 
  $age = strtotime($birthday); 
  if($age === false){ 
    return false; 
  } 
  list($y1,$m1,$d1) = explode("-",date("Y-m-d",$age)); 
  $now = strtotime("now"); 
  list($y2,$m2,$d2) = explode("-",date("Y-m-d",$now)); 
  $age = $y2 - $y1; 
  if((int)($m2.$d2) < (int)($m1.$d1)) 
    $age -= 1; 
  return $age; 
} 
echo birthday(&#39;1986-07-22&#39;); 
?>

I hope this article will be helpful to everyone’s PHP programming design.