note 52262 added to function.strpos

From: Date: Tue, 26 Apr 2005 16:02:51 +0000
Subject: note 52262 added to function.strpos
Groups: php.notes 
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Here's a quick function which can replace strtotime, and will work fine on dates pre-1970 (i.e. it will return a negative number as expected). This negative time stamp seems to be supported as an input parameter by methods like date() up to a point, but if you get crazy and start talking about dates in the 1700s (everybody was using PHP3 back then, of course) it gets upset. For those of you doing staff databases and so forth, of course, this is probably fine - it's definitely OK for any dates post 1900, and this value has been hard coded into the function below. function safestrtotime($strInput) { $iVal = -1; for ($i=1900; $i<=1969; $i++) { # Check for this year string in date $strYear = (string)$i; if (!(strpos($strInput, $strYear)===false)) { $replYear = $strYear; $yearSkew = 1970 - $i; $strInput = str_replace($strYear, "1970", $strInput); }; }; $iVal = strtotime($strInput); if ($yearSkew > 0) { $numSecs = (60 * 60 * 24 * 365 * $yearSkew); $iVal = $iVal - $numSecs; $numLeapYears = 0; # Work out number of leap years in period for ($j=$replYear; $j<=1969; $j++) { $thisYear = $j; $isLeapYear = false; # Is div by 4? if (($thisYear % 4) == 0) { $isLeapYear = true; }; # Is div by 100? if (($thisYear % 100) == 0) { $isLeapYear = false; }; # Is div by 1000? if (($thisYear % 1000) == 0) { $isLeapYear = true; }; if ($isLeapYear == true) { $numLeapYears++; }; }; $iVal = $iVal - (60 * 60 * 24 * $numLeapYears); }; return($iVal); }; ---- Manual Page -- http://www.php.net/manual/en/function.strpos.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+52262 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+52262&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+52262&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+52262&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+52262&report=yes&reason=useless Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+52262&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+52262&report=yes Search -- http://master.php.net/manage/user-notes.php

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