you must use exactly same time/zone before converting date to timestamp otherwise, strtotime() will use default server timezone. Please be careful about time/zone if you set it to save dates in database, as I got an issue when I compared dates from mysql that converted to timestamp using strtotime. Unless you are working with localized date strings, the easier choice is likely DateTime. Yet another alternative is to use the IntlDateFormatter API: $formatter = new IntlDateFormatter( Note that if you do not set the !, the time portion will be set to current time, which is different from the first four which will use midnight when you omit the time. 22 I have a mySQL database with a timestamp field. If the above fails because you are using a unsupported format, you can use $date = DateTime::createFromFormat('!d-m-Y', '22-09-2008') The same with the procedural API: $date = date_create('') With DateTime API: $dateTime = new DateTime('') Therefore I recommend to always specify date format. If the year falls in the range 0 (inclusive) to 69 (inclusive), 2000 is added. It provides greater precision in time, supporting fractions of a second up to nine places and is also capable of storing time zone information. Note: For the y and yy formats, years below 100 are handled in a special way when the y or yy symbol is used. The TIMESTAMP type, available since Oracle9 i, is effectively an extended form of the DATE type and complies with ANSI SQL. It can save awkward debugging in the future. Timestamp is a data type and function in Standard Structured Query Language (SQL) that lets us store and work with both date and time data values, usually without specified time zones. To format DateTimeImmutable and DateTime objects, please refer to the documentation of the DateTimeInterface::format () method. Regardless, it's always a good starting point to be strict when parsing strings into structured data. timestamp The optional timestamp parameter is an int Unix timestamp that defaults to the current local time if timestamp is omitted or null. (Same as " GMT".) $d = DateTime::createFromFormat( Note: date() will always generate 000000 as microseconds since it takes an int parameter, whereas DateTime::format() does support microseconds if DateTime was created with microseconds. (Same as New York.) $d = DateTime::createFromFormat( If you want to specify in which time zone, here EST. The function expects to be given a string containing an English date format and will try to parse that format into a Unix timestamp (the number of seconds since Janu00:00:00 UTC), relative to the timestamp given in baseTimestamp, or the current time if baseTimestamp is not supplied. If you don't care about timezone, or want to use the time zone your server uses: $d = DateTime::createFromFormat('d-m-Y H:i:s', '22-09-2008 00:00:00') ฤก222093324 (This will differ depending on your server time zone.) This method works on both Windows and Unix and is time-zone aware, which is probably what you want if you work with dates.
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