Comments on: Helpful strtotime reminders http://www.102degrees.com/blog/2007/07/11/helpful-strtotime-reminders/ Web Programming and Design by Aaron Saray Tue, 06 Jan 2009 04:37:56 +0000 http://wordpress.org/?v=2.7 hourly 1 By: Todd http://www.102degrees.com/blog/2007/07/11/helpful-strtotime-reminders/comment-page-1/#comment-702 Todd Thu, 12 Jun 2008 22:16:05 +0000 http://www.102degrees.com/blog/2007/07/11/helpful-strtotime-reminders/#comment-702 >> Finally, the plain year came out as that year’s version of >> today’s date - which is kind of helpful (in case you wanted >> to know what day july 11th was back in 1999). Be careful when using strtotime with numbers only! gnu wants to interpret number only formats differently and a four-digit number is assumed to be hhmm. Since 1999 is not a valid time (19:99) it must automatically fallback to assuming it is a year, but 2000 is 8:00 p.m. of the current date, watch what happens! print "date('r', strtotime('1999'))"; print date('r', strtotime('1999')) . "\n"; print "date('r', strtotime('2000'))"; print date('r', strtotime('2000')) . "\n"; print "date('r', strtotime('2230'))"; print date('r', strtotime('2230')) . "\n"; Prints: date('r', strtotime('1999'))Sat, 12 Jun 1999 21:36:27 +0000 date('r', strtotime('2000'))Thu, 12 Jun 2008 20:00:00 +0000 date('r', strtotime('2230'))Thu, 12 Jun 2008 22:30:00 +0000 Note that the date for the last two entries are for 2008, not the years 2000 and 2230, respectively. However, the time is 20:00 and 22:30, respectively. So, the strtotime library views a 4-digit number differently! >> Finally, the plain year came out as that year’s version of
>> today’s date - which is kind of helpful (in case you wanted
>> to know what day july 11th was back in 1999).

Be careful when using strtotime with numbers only! gnu wants to interpret number only formats differently and a four-digit number is assumed to be hhmm. Since 1999 is not a valid time (19:99) it must automatically fallback to assuming it is a year, but 2000 is 8:00 p.m. of the current date, watch what happens!

print “date(’r', strtotime(’1999′))”;
print date(’r', strtotime(’1999′)) . “\n”;
print “date(’r', strtotime(’2000′))”;
print date(’r', strtotime(’2000′)) . “\n”;
print “date(’r', strtotime(’2230′))”;
print date(’r', strtotime(’2230′)) . “\n”;

Prints:

date(’r', strtotime(’1999′))Sat, 12 Jun 1999 21:36:27 +0000
date(’r', strtotime(’2000′))Thu, 12 Jun 2008 20:00:00 +0000
date(’r', strtotime(’2230′))Thu, 12 Jun 2008 22:30:00 +0000

Note that the date for the last two entries are for 2008, not the years 2000 and 2230, respectively. However, the time is 20:00 and 22:30, respectively. So, the strtotime library views a 4-digit number differently!

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