Solved

calculate age from dob??

Posted on 2009-04-10
6
333 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 108

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
6 Surprising Benefits of Threat Intelligence

All sorts of threat intelligence is available on the web. Intelligence you can learn from, and use to anticipate and prepare for future attacks.

 
LVL 108

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 108

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

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

Suggested Solutions

I imagine that there are some, like me, who require a way of getting currency exchange rates for implementation in web project from time to time, so I thought I would share a solution that I have developed for this purpose. It turns out that Yaho…
These days socially coordinated efforts have turned into a critical requirement for enterprises.
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
This tutorial will teach you the core code needed to finalize the addition of a watermark to your image. The viewer will use a small PHP class to learn and create a watermark.

758 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

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now