The valid range of a timestamp is typically from Fri, GMT to Tue, GMT.(These are the dates that correspond to the minimum and maximum values for a 32-bit signed integer).

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When escaping, be sure to use single quotes to prevent characters like \n from becoming newlines.

in the "datetime" attribute you should put a machine-readable value which represent time , the best value is a full time/date with ISO 8601 ( date('c') ) ,,, the attr will be hidden from usersand it doesn't really matter what you put as a shown value to the user,, any date/time format is okay !

This is very good for SEO especially search engines like Google ./** * Convert a strftime format to a date format * * Unsupported strftime formats : %U, %W, %C, %g, %r, %R, %T, %X, %c, %D, %F, %x * Unsupported date formats : S, n, t, L, B, G, u, e, I, P, Z, c, r * * @param string $strftime Format a strftime format * @return string */ If you are having an issue getting u to work so is everyone else.

The solution that I am using which I found on another site(so not taking credit) is to use this: date("Y/m/d H:i:s").

substr((string)microtime(), 1, 6);that will give you: yyyy/mm/dd hh:ii:ss.uuuuuuhope this helps someone in need! This is much more obvious on the "zero-padded" results, but it's worth repeating.

thanks all Thanks to tcasparr at gmail dot com for the great idea (at least for me) ;)I changed the code a little to replicate the functionality of date_parse_from_format, once I don't have PHP 5.3.0 yet. Hope you don't mind changing your code tcasparr at gmail dot com./******************************************************* * Simple function to take in a date format and return array of associated * formats for each date element * * @return array * @param string $str Format * * Example: Y/m/d g:i:s becomes * Array * ( * [year] = a day number 1 for Monday through 7 for Sunday... If you aren't careful, you can get stuck in a while loop comparing days of the week with something like: Most spreadsheet programs have a rather nice little built-in function called NETWORKDAYS to calculate the number of business days (i.e.

Monday-Friday, excluding holidays) between any two given dates.

I couldn't find a simple way to do that in PHP, so I threw this together.

It replicates the functionality of Open Office's NETWORKDAYS function - you give it a start date, an end date, and an array of any holidays you want skipped, and it'll tell you the number of business days (inclusive of the start and end days! I've tested it pretty strenuously but date arithmetic is complicated and there's always the possibility I missed something, so please feel free to check my math.

The function could certainly be made much more powerful, to allow you to set different days to be ignored (e.g.

"skip all Fridays and Saturdays but include Sundays") or to set up dates that should always be skipped (e.g.