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 Topic: PHP strtotime issue |
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James Blond
Moderator
Joined: 19 Jan 2006
Posts: 7443
Location: EU, Germany, Next to Hamburg
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 Posted: Wed 01 Feb '17 12:58 Post subject: PHP strtotime issue |
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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
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How to solve this madness!? |
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mraddi
Joined: 27 Jun 2016
Posts: 152
Location: Schömberg, Baden-Württemberg, Germany
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| Posted: Wed 01 Feb '17 18:58 Post subject: |
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Funny bug 
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  |
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timo
Joined: 03 Jun 2012
Posts: 46
Location: FI, EU
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| Posted: Wed 01 Feb '17 20:37 Post subject: |
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| mraddi wrote: | Funny bug
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 |
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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