Solved

calculate age from dob??

Posted on 2009-04-10
6
336 Views
Last Modified: 2013-12-12
Below is how i store a dob... by using echo $getuserprofile['dob']; i can echo a users dob...but who can i work out there age?
<?php  
	$months = array (1 => 'January', 'February', 'March', 'April', 'May', 'June','July', 'August', 'September', 'October', 'November', 'December');
$weekday = array('Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday');
$days = range (1, 31);
$years = range (1910, 2015);
 
//**********************************************
 
echo "Day: <select name='day'>";
foreach ($days as $value) {
   echo '<option ';
   if($splitDate[0] == $value)
      echo 'selected="selected"';
   echo ' value="'.$value.'">'.$value.'</option>\n';
} echo '</select>';
 
echo "Month: <select name='month'>";
foreach ($months as $value) {
 
   echo '<option ';
   if($splitDate[1]==$value) 
      echo "selected='selected'";
   echo 'value="'.$value.'">'.$value.'</option>\n';
} echo '</select>';
 
echo "Year: <select name='year'>";
foreach ($years as $value) {
   echo '<option ';
   if($splitDate[2]==$value)
      echo 'selected="selected"';
   echo " value='".$value."'>".$value."</option>\n";
} 
$dob = $day.'-'.$month.'-'.$year; 
 ?>

Open in new window

0
Comment
Question by:runnerjp
  • 3
  • 2
6 Comments
 
LVL 19

Expert Comment

by:Michael701
ID: 24116607
try this
$today=getdate();
$age=$today['year']-$dob_year-1;
// now have they had a birthday this year?
if ($today['month']>$dob_month)
  $age++;
else
  if ($today['month']==$dob_month)
    if ($today['mday']>=$dob_day)
      $age++;
 
echo $age;

Open in new window

0
 
LVL 109

Accepted Solution

by:
Ray Paseur earned 500 total points
ID: 24116680

<?php // RAY compute_age_from_dob.php
 
// TEST DATA
$dob = '15'.'-'.'09'.'-'.'1950';
 
// GET TIMESTAMPS
$ts_dob = strtotime($dob);
$ts_now = time();
 
// DIFFERENCE IN YEARS
$years = date('Y', $ts_now) - date('Y', $ts_dob);
 
// IF BEFORE THE BIRTHDAY
$mdnow = date('m-d', $ts_now);
$mddob = date('m-d', $ts_dob);
if ($mdnow < $mddob) $years--;
 
// SHOW THE ANSWER
echo $years;

Open in new window

0
 

Author Comment

by:runnerjp
ID: 24116846
soryy i should have said i display dob as 19-December-1987   so would i need to somehow convert the month into numeric?
0
Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

 
LVL 109

Expert Comment

by:Ray Paseur
ID: 24116858
That should work OK with strtotime()

http://www.laprbass.com/RAY_strtotime.php?s=19-December-1987

HTH, ~Ray
0
 
LVL 19

Expert Comment

by:Michael701
ID: 24117010

// since you already $months, this should get the month number
$dob_month = array_keys ( $months, $dob_month_text );
 
 
// but really you should
 
echo "Month: <select name='month'>";
foreach ($months as $month_number=>$month_name) {
 
   echo '<option ';
   if($splitDate[1]==$month_name) 
      echo "selected='selected' ";
   echo 'value="'.$month_number.'">'.$month_name.'</option>\n';
} echo '</select>';

Open in new window

0
 
LVL 109

Expert Comment

by:Ray Paseur
ID: 24117044
One note, not directly at issue here, but useful as a "best practices" approach to handling dates.  Make all internal representations into ISO8601 date/time strings.  php date('c') gives you the traditional format

YYYY-MM-DD HH:MM:SS

This is useful because you can use it with strtotime and date() to format dates and times for output, and you can see the columns line up in reports.  Also, it collates and compares correctly whether in a timestamp or a character string.
0

Featured Post

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article will explain how to display the first page of your Microsoft Word documents (e.g. .doc, .docx, etc...) as images in a web page programatically. I have scoured the web on a way to do this unsuccessfully. The goal is to produce something …
Since pre-biblical times, humans have sought ways to keep secrets, and share the secrets selectively.  This article explores the ways PHP can be used to hide and encrypt information.
The viewer will learn how to count occurrences of each item in an array.
The viewer will learn how to create a basic form using some HTML5 and PHP for later processing. Set up your basic HTML file. Open your form tag and set the method and action attributes.: (CODE) Set up your first few inputs one for the name and …

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question