matfish Posted July 21, 2006 Share Posted July 21, 2006 Hi,Im trying to find out how to calculate the correct age from a given date of birth. I did use just the years (this year 2006 - date pf birth year) but this is inaccurate as surely it should also go by day and month?Anyone help?Thanks Quote Link to comment Share on other sites More sharing options...
hackerkts Posted July 21, 2006 Share Posted July 21, 2006 At the moment I could only thinks of a troublesome method.First include this to your script[code]$day = date('d'); // This will check the current date$month = date('m'); // This will check the current month$year = date('Y'); // This will check the current year[/code]After that you just include a form that let the user choose their date of birth and use those informations above to calculate.Example:[code]$_POST['year'] - $year[/code]This will give you the year. Quote Link to comment Share on other sites More sharing options...
brown2005 Posted July 21, 2006 Share Posted July 21, 2006 <?phpfunction age($dob){$date = strtotime($dob);$today = strtotime(date("d/m/Y"));echo floor(($today - $date) / 31556926);}age("30/03/1900"); //Displays 20?> Quote Link to comment Share on other sites More sharing options...
Barand Posted July 21, 2006 Share Posted July 21, 2006 Ummm, That would have been right in 1920. Unix time functions don't work on dates before '1970-01-01'Try[code]<?phpfunction age($dt) { $y1 = date('Y', strtotime($dt)); $y2 = date('Y'); $md1 = date('md', strtotime($dt)); $md2 = date('md'); return ($md2 < $md1) ? ($y2 - $y1 - 1) : ($y2 - $y1);}$dob = '1949-01-22';echo age($dob);?>[/code] Quote Link to comment Share on other sites More sharing options...
brown2005 Posted July 21, 2006 Share Posted July 21, 2006 well that wasnt my own code, it was the code someone else gave to me, so i will change it to your code..SO NOT MY FAULT Quote Link to comment Share on other sites More sharing options...
brown2005 Posted July 21, 2006 Share Posted July 21, 2006 how would you add months on to it...say like 18 years 4 months....any ideas? Quote Link to comment Share on other sites More sharing options...
zq29 Posted July 21, 2006 Share Posted July 21, 2006 [quote author=Barand link=topic=101345.msg401042#msg401042 date=1153472554]Ummm, That would have been right in 1920. Unix time functions don't work on dates before '1970-01-01'[/quote][quote author=brown2005 link=topic=101345.msg401128#msg401128 date=1153484750]well that wasnt my own code, it was the code someone else gave to me, so i will change it to your code..SO NOT MY FAULT[/quote]That is a variation of some code I posted the other week, looking back on it, it's not the most ideal solution (there's a bug in there too I have noticed). But it does work on dates prior to the epoc on some installs. Negative timestamps are supported on a *NIX/PHP5 combo I believe... Quote Link to comment Share on other sites More sharing options...
Barand Posted July 21, 2006 Share Posted July 21, 2006 [code]function age($dt) { $t = strtotime($dt); $y1 = date('Y', $t); $y2 = date('Y'); $md1 = date('md', $t); $md2 = date('md'); if ($md2 < $md1) { $yrs = ($y2 - $y1 - 1); $mths = 12 + date('m') - date('m', $t); } else { $yrs = ($y2 - $y1); $mths = date('m') - date('m', $t); } return "$yrs years $mths months";}[/code] Quote Link to comment Share on other sites More sharing options...
matfish Posted July 21, 2006 Author Share Posted July 21, 2006 Barands code:[code]<?phpfunction age($dt) { $y1 = date('Y', strtotime($dt)); $y2 = date('Y'); $md1 = date('md', strtotime($dt)); $md2 = date('md'); return ($md2 < $md1) ? ($y2 - $y1 - 1) : ($y2 - $y1);}$dob = '1949-01-22';echo age($dob);?>[/code]works a treat!Many thanks!!!! Quote Link to comment Share on other sites More sharing options...
Barand Posted July 21, 2006 Share Posted July 21, 2006 [quote=SA]That is a variation of some code I posted the other week, looking back on it, it's not the most ideal solution (there's a bug in there too I have noticed). But it does work on dates prior to the epoc on some installs. Negative timestamps are supported on a *NIX/PHP5 combo I believe...[/quote]Looks as though it works even on windows so long at its year 1901+. Guess the earlier example using 1900 was just unlucky. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.