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PHP strtotime issue

 
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James Blond
Moderator


Joined: 19 Jan 2006
Posts: 6255
Location: Germany, Next to Hamburg

PostPosted: Wed 01 Feb '17 12:58    Post subject: PHP strtotime issue Reply with quote

have to use PHP 5.3.3 on CentOS :/

Code:
<?php
date_default_timezone_set('Europe/Berlin');

$string1 = '1st february this year';
echo date("d.m.Y",strtotime($string1));

// result: 01.02.2017 --> OKAY

$string2 = 'last day of february this year';
echo date("d.m.Y",strtotime($string2));

// result: 31.03.2017 --> NOT OKAY


How to solve this madness!?
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mraddi



Joined: 27 Jun 2016
Posts: 28
Location: Schömberg, Baden-Württemberg, Germany

PostPosted: Wed 01 Feb '17 18:58    Post subject: Reply with quote

Funny bug Laughing

is it possible for you to find out the first day of march and go back one day?
Code:
$string3 = 'first day of march this year';
echo date("d.m.Y",strtotime("-1 day", strtotime($string3)));


As I don't have PHP 5.3.3 available I cannot test the result myself Confused
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timo



Joined: 03 Jun 2012
Posts: 28
Location: FI, EU

PostPosted: Wed 01 Feb '17 20:37    Post subject: Reply with quote

mraddi wrote:
Funny bug Laughing

is it possible for you to find out the first day of march and go back one day?
Code:
$string3 = 'first day of march this year';
echo date("d.m.Y",strtotime("-1 day", strtotime($string3)));


As I don't have PHP 5.3.3 available I cannot test the result myself Confused


With some older PHP version (can't remember which) I had the same problem, and I tested it with this code
Code:
<?php
   $months = array("january", "february", "march", "april", "may", "june", "july", "august", "september", "october", "november", "december");
   
   foreach ($months as $month) {
      $string = "last day of " . $month . " this year";
      $a = $month ." - " . date("j.n.Y", strtotime($string, time()));
      $b = $month ." - " . date("j.n.Y", strtotime($string, mktime(0,0,0,date("n"),1,date("Y"))));
      if ($a <> $b) $errormsg = "***"; else $errormsg = "";
      echo substr($a . str_repeat(" ",30), 0, 30) . substr($b . str_repeat(" ", 30), 0, 30) . $errormsg . "\r\n";
   }
?>

On older versions, $a produced false date under certain conditions (month had less than 31 days etc), $b was always correct date.

With PHP 7.1.2RC1 both $a and $b have correct values, here's my output:

Code:
C:\TEMP>datetest-last.php
january - 31.1.2017           january - 31.1.2017
february - 28.2.2017          february - 28.2.2017
march - 31.3.2017             march - 31.3.2017
april - 30.4.2017             april - 30.4.2017
may - 31.5.2017               may - 31.5.2017
june - 30.6.2017              june - 30.6.2017
july - 31.7.2017              july - 31.7.2017
august - 31.8.2017            august - 31.8.2017
september - 30.9.2017         september - 30.9.2017
october - 31.10.2017          october - 31.10.2017
november - 30.11.2017         november - 30.11.2017
december - 31.12.2017         december - 31.12.2017
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