From: [EMAIL PROTECTED]
Operating system: Linux Mandrake 7.2
PHP version: 4.2.3
PHP Bug Type: Date/time related
Bug description: strtotime ("Monday", $date) can produce incorrect output
Strtotime() appears to produce incorrect output under some circumstances -
specifically when wanting the date of a particular day of the week day of
the week from a given starting date. For example, using 2001-3-20 as a
starting point, we want the date for the next Monday. The correct answer
is the 26th, but the result produced is the 25th (a Sunday). The correct
result is given sometimes, so this appears to depend on the input.
A sample script to illustrate:
=======================================================
#!/root/php-4.2.3 -q
<?php
// report any errors at all
error_reporting (E_ALL);
// pass a date, supply a strtotime modifier, and get a date back
function getDateWithModifier($date, $modifier) {
list ($year, $month, $day) = explode ("-",$date);
$starting_timestamp = mktime (10,10,10,$month,$day,$year);
$timestamp_with_modifier = strtotime ($modifier,
$starting_timestamp);
return date("Y-n-j", $timestamp_with_modifier);
}
print "<hr>\n";
print "from 2001-3-17, goto monday: " . getDateWithModifier("2001-3-17",
"Monday") . "; should be 2001-3-19.<br>\n";
print "from 2001-3-18, goto monday: " . getDateWithModifier("2001-3-18",
"Monday") . "; should be 2001-3-19.<br>\n";
print "from 2001-3-19, goto monday: " . getDateWithModifier("2001-3-19",
"Monday") . "; should be 2001-3-19.<br>\n";
print "from 2001-3-20, goto monday: " . getDateWithModifier("2001-3-20",
"Monday") . "; should be 2001-3-26 ###.<br>\n";
print "from 2001-3-21, goto monday: " . getDateWithModifier("2001-3-21",
"Monday") . "; should be 2001-3-26 ###.<br>\n";
print "from 2001-3-22, goto monday: " . getDateWithModifier("2001-3-22",
"Monday") . "; should be 2001-3-26 ###.<br>\n";
print "from 2001-3-23, goto monday: " . getDateWithModifier("2001-3-23",
"Monday") . "; should be 2001-3-26 ###.<br>\n";
print "from 2001-3-24, goto monday: " . getDateWithModifier("2001-3-24",
"Monday") . "; should be 2001-3-26 ###.<br>\n";
print "from 2001-3-25, goto monday: " . getDateWithModifier("2001-3-25",
"Monday") . "; should be 2001-3-26 ###.<br>\n";
print "from 2001-3-26, goto monday: " . getDateWithModifier("2001-3-26",
"Monday") . "; should be 2001-3-26.<br>\n";
print "from 2001-3-27, goto monday: " . getDateWithModifier("2001-3-27",
"Monday") . " ; should be 2001-4-2.<br>\n";
print "<hr>\n";
print "PHP version: " . phpversion(). "<br>\n";
?>
=======================================================
Produces this output:
=======================================================
[root@www tmp]# ./script.php
<hr>
from 2001-3-17, goto monday: 2001-3-19; should be 2001-3-19.<br>
from 2001-3-18, goto monday: 2001-3-19; should be 2001-3-19.<br>
from 2001-3-19, goto monday: 2001-3-19; should be 2001-3-19.<br>
from 2001-3-20, goto monday: 2001-3-25; should be 2001-3-26 ###.<br>
from 2001-3-21, goto monday: 2001-3-25; should be 2001-3-26 ###.<br>
from 2001-3-22, goto monday: 2001-3-25; should be 2001-3-26 ###.<br>
from 2001-3-23, goto monday: 2001-3-25; should be 2001-3-26 ###.<br>
from 2001-3-24, goto monday: 2001-3-25; should be 2001-3-26 ###.<br>
from 2001-3-25, goto monday: 2001-3-25; should be 2001-3-26 ###.<br>
from 2001-3-26, goto monday: 2001-3-26; should be 2001-3-26.<br>
from 2001-3-27, goto monday: 2001-4-2 ; should be 2001-4-2.<br>
<hr>
PHP version: 4.2.3<br>
[root@www tmp]#
========================================================
Expected output: The 6 lines with "###" are expected to produce the
indicated output, but do not.
Problem was noticed today in PHP 4.06, and then verified as being
reproducible in PHP 4.2.3 (same output).
PHP 4.2.3 configured with:
./configure --with-mysql --enable-xml --enable-wddx
--
Edit bug report at http://bugs.php.net/?id=20382&edit=1
--
Try a CVS snapshot: http://bugs.php.net/fix.php?id=20382&r=trysnapshot
Fixed in CVS: http://bugs.php.net/fix.php?id=20382&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=20382&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=20382&r=needtrace
Try newer version: http://bugs.php.net/fix.php?id=20382&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=20382&r=support
Expected behavior: http://bugs.php.net/fix.php?id=20382&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=20382&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=20382&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=20382&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=20382&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=20382&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=20382&r=isapi
