php|architect's Guide to Date and Time Programming - download pdf or read online

By Derick Rethans

ISBN-10: 0981034500

ISBN-13: 9780981034508

In case your improvement consists of operating with dates and occasions, then this ebook is a must have. during this booklet, Derick Rethans (contributor to PHP’s center date extension and famous Hypertext Preprocessor professional) explores in nice aspect the delicate nuances of operating with dates and instances. often personal home page builders stumble upon unforeseen effects that adversely impact their software program and internet purposes. This booklet will absolutely support them take on these issues.
This e-book covers quite a few parts including:
* historical past of calendars and time criteria, giving the reader a greater figuring out of ways date/time ideas developed into the best way they're today
* parsing date/time strings and the aptitude pitfalls a developer can encounter
* timezones, the quirks inherent in them, and the way your program can deal with those quirks
* formatting and representing occasions and dates safely and working with the DateTime Object
* manipulating and dealing with prior, destiny and ordinary dates
* acquiring dates while timestamps aren’t available
* layout specifiers
* upgrading the grasp timezone database

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Extra info for php|architect's Guide to Date and Time Programming

Example text

In case some information is not available, and no default is picked the value of the entry will be false, like the year entry in the example. Depending on the string with time information, more elements could be part of the returned array. When relative time has been passed to the date_parse() function, a new element relative is part of the returned array. ). The available elements are: • year - The parsed year, or false if not available. • month - The parsed month, or false if not available. Download from Wow!

If while parsing a string a date is found that invalid, such as 2008-04-31 (April only has 30 days), an additional entry is added to the return value of date_get_last_errors() and DateTime::getLastErrors(). This warning looks like: ["warnings"]=> array(1) { [10]=> string(27) "The parsed date was invalid" } Alternatively you can use the checkdate()function to check whether a specific year, month, day combination is valid. Both the checkdate() function and the mechanism in the parser follow the Gregorian calendar.

This database is used by PHP to provide timezone support. PHP allows you to query the database to find out which timezones are supported with the DateTimeZone::listIdentifiers() static method (or its procedural equivalent timezone_identifiers_list()) . Without any arguments this method returns all timezone identifiers, except for the ones that are only available for backwards compatibility reasons. At the moment this list contains about 450 timezones. The following code shows the number of timezones and the first five identifiers.

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php|architect's Guide to Date and Time Programming by Derick Rethans

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