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Full Discussion: [PHP]Compare dates
Top Forums Web Development [PHP]Compare dates Post 302382852 by noratx on Saturday 26th of December 2009 11:27:06 AM
Old 12-26-2009
[PHP]Compare dates

Hi.

I have an application that stores some dates in unix timestamp format, and I need to compare those dates.
More exactly I need some sort of if-statements that checks how long time it is from todays date untill the timestamp and store it into variables.
When it's done, I need to have the output echoed so that I get an consecutive string like this:
John Doe, 10|Jane Doe, 5|

In the example above it shows both names and days left untill timestamp, I need to add more things too, it's just the comparing of the timestamps I need help with, as I have no clue of how to compare them and tell how many days there are between todays date and the timestamp.
It should be rounded down to the nearest lower day, so if there are 5.9 or 5.1 days left, it should only say 5 days.

Anyone who understand my need and can help me?
Many thanks in advance!
 

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PX_TIMESTAMP2STRING(3)													    PX_TIMESTAMP2STRING(3)

px_timestamp2string - Converts the timestamp into a string.

SYNOPSIS
string px_timestamp2string (resource $pxdoc, float $value, string $format) DESCRIPTION
Turns a timestamp as it stored in the paradox file into human readable format. Paradox timestamps are the number of miliseconds since 0001-01-02. This function is just for convenience. It can be easily replaced by some math and the calendar functions as demonstrated in the following example. PARAMETERS
o $pxdoc - Resource identifier of the paradox database. o $value - Value as stored in paradox database field of type PX_FIELD_TIME, or PX_FIELD_TIMESTAMP. o $format - String format similar to the format used by date(3). The placeholders support by this function is a subset of those supported by date(3) (Y, y, m, n, d, j, H, h, G, g, i, s, A, a, L). RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 Turn a paradox timestamp into a human readable form <?php $px = px_new(); /* make up a date as it could be stored in */ /* a date field of a paradox db. */ /* 700000 days since 1.1.0000. */ $days = 700000; /* Use the calendar functions to print a */ /* human readable format of the date */ echo jdtogregorian($days+1721425)." "; /* Turn it into a timestamp as it stored in a paradox database */ /* Timestamps are stored in miliseconds since 0001-01-02 */ $stamp = $days * 86400.0 * 1000.0; /* Add one hour */ $stamp += 3600000.0; /* The following will output '7/15/1917 01:00:00'. */ echo px_timestamp2string($px, $stamp, "n/d/Y H:i:s")." "; px_delete($px); ?> The above example will output: 7/15/1917 7/15/1917 01:00:00 The Julian day count as passed to jdtogregorian(3) has a different base of 1.1.4714 b.c. and must therefore be calculated by adding 1721425 to the day count used in the paradox file. Turning the day count into a timestamp is easily done by multiplying with 86400000.0 to obtain miliseconds. SEE ALSO
px_date2string(3), jdtogregorian(3). PHP Documentation Group PX_TIMESTAMP2STRING(3)
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