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In php5 "Yesterday" will return the infamous 1969 date. In php4 "Yesterday" would parse correctly. (A much preferred behavior IMO.)ĥ) Some uppercase and mixed-case strings no longer parse correctly.
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PHP5 will give no notice and return the current date stamp. Note that this is true of strings that might appear right such as "two weeks".Ĥ) (Partially noted in changelog.) If you pass php4 an empty string it will error out with a "Notice: strtotime(): Called with empty time parameter". In PHP 5 strtotime will return FALSE which causes date () to return 12/31/69. This is pretty useful for catching errors in your scripts.
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If you in turn pass this to date () you'll get a warning like: Windows does not support dates prior to midnight. in PHP5 the string must be "today +1 week" to correctly parse.ģ) (Partially noted in changelog.) If you pass php4 a string that is a mess ("asdf1234") it will return -1. In PHP4 the string "today + 1 week" works great. For the string "this tuesday" both PHP4 and PHP5 would return "today".Ģ) You cannot include a space immediately following a + or - in PHP 5. For the string "last tuesday" both PHP4 and PHP5 would return "today -1week". Note that behavior has NOT changed for "last" and "this". PHP5 " next tuesday" will actually return next tuesday as in "today +1week". I confirmed these with two separate fresh installations of PHP 4.4.1 and PHP 5.1.1.ġ) Given that today is Tuesday: PHP4 " next tuesday" will return today. I'm posting these here as I believe these to be design changes, not bugs.įor those upgrading from PHP 4 to PHP 5 there are a number of things that are different about strtotime that I have NOT seen documented elsewhere, or at least not as clearly. This is useful with the Date () Function: There doesn't seem to be enough documentation about this feature of strtotime(), but it can take a SQL datetime column and convert it to a unix timestamp. If you're on a server that doesn't have a recent PHP version test your result before assuming this one works. Prior to PHP 5.0, though it might have been an earlier version, strtotime() would return -1 on a mysql datetime string. Part of the reason for this is that it is only a relatively recent addition. Regarding the previous post on strtotime() being used to convert mysql datetime strings, I agree that this is not widely realized. It looks like in the latest release of PHP 5.1, when passing to strtotime this string "", it will now return the date "". determine the difference between the users timezone and the serversįunction convert ( $datetime, $format = 'M j, Y \a\t g:iA' ) )/", "\\2/\\1/\\3", $str) Īs strtotime, if the year isn't provided it will default to current year: $this -> difference = ( $this -> user_offset - $this -> default_offset ) If (isset( $default_offset )) $this -> default_offset = $default_offset Hopefully, this will save somebody time in the future. The date () format can be customized as a second parameter of the convert all.php?act=funct&argument= Works with any standard timezone. So, for example, if you make a news post to your website at 11:30AM in EST (-5), and a user which is located on the west coast of the US (PST -8) views your website the post time will be displayed in THEIR time (8:30AM). Upon construction, it takes the users timezone (perhaps a setting pulled from a database or session) and the timezone in which the server is located, and the MySQL datetime to be localized.
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I'm not sure whether I've overcomplicated this example, but here is my shot at the perfect timezone class.