Calculate Age from Birth Day php

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Using php You could do lot of calculations.From this tutorial i am going to introduce you popular and an interesting type of calculations.Some of calculations, I have introduced you in mysql php examples.Here you have to enter your birth days in this format of date "1965-06-12". The input field is bellow.

php codes to calculate age from birth day is as follows

<?php $birthday=$_POST['birth_day']; 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 $age; } echo birthday($birthday); ?> <form method="post" action="<?php echo $PHP_SELF;?>"> <table> <tr><td><input type="text" name="birth_day"></td></tr> <tr><td><input type="submit" value="Enter"></td></tr>  </form> </table>

Using bellow scripts you will get year,month and dates also

<?php $bday=$_POST['birth_day']; function get_Age_difference($start_date,$end_date){     list($start_year,$start_month,$start_date) = split('-', $start_date);     list($current_year,$current_month,$current_date) = split('-', $end_date);      $result = '';    for($x=1 ; $x<=12 ; $x++){         $dim[$x] = date('t',mktime(0,0,0,$x,1,date('Y')));     }     $m = $current_month - $start_month;     $d = $current_date - $start_date;     $y = $current_year - $start_year;  if($d < 0) {         $today_day = $current_date + $dim[$current_month];         $today_month = $current_month - 1;         $d = $today_day - $start_date;         $m = $today_month - $start_month;         if(($today_month - $start_month) < 0) {             $today_month += 12;             $today_year = $current_year - 1;             $m = $today_month - $start_month;             $y = $today_year - $start_year;         }     }    if($m < 0) {         $today_month = $current_month + 12;         $today_year = $current_year - 1;         $m = $today_month - $start_month;         $y = $today_year - $start_year;         }   if($y < 0) {         die("Start Date Entered is a Future date than End Date.");     } else {         switch($y) {             case 0 : $result .= ''; break;             case 1 : $result .= $y.($m == 0 && $d == 0 ? ' year old' : ' year'); break;             default : $result .= $y.($m == 0 && $d == 0 ? ' years old' : ' years');         }         switch($m) {             case 0: $result .= ''; break;             case 1: $result .= ($y == 0 && $d == 0 ? $m.' month old' : ($y == 0 && $d != 0 ? $m.' month' : ($y != 0 && $d == 0 ? ' and '.$m.' month old' : ', '.$m.' month'))); break;             default: $result .= ($y == 0 && $d == 0 ? $m.' months old' : ($y == 0 && $d != 0 ? $m.' months' : ($y != 0 && $d == 0 ? ' and '.$m.' months old' : ', '.$m.' months'))); break;         }         switch($d) {             case 0: $result .= ($m == 0 && $y == 0 ? 'Today' : ''); break;             case 1: $result .= ($m == 0 && $y == 0 ? $d.' day old' : ($y != 0 || $m != 0 ? ' and '.$d.' day old' : '')); break;             default: $result .= ($m == 0 && $y == 0 ? $d.' days old' : ($y != 0 || $m != 0 ? ' and '.$d.' days old' : ''));         }     }     return $result; } $date_difference= get_Age_difference($bday,date("Y-m-d")); echo $date_difference; ?> <form method="post" action="<?php echo $PHP_SELF;?>"> <table> <tr><td><input type="text" name="birth_day"></td></tr> <tr><td><input type="submit" value="Enter"></td></tr> </form> </table>

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