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Full Discussion: Storing timestamp of files in an array
Top Forums UNIX for Beginners Questions & Answers Storing timestamp of files in an array Post 303001167 by rbatte1 on Friday 28th of July 2017 06:20:44 AM
Old 07-28-2017
Would it be safer to use stat to get a known format timestamp then convert it to one that meets your requirements rather than relying on the risks by using ls and being subject to locale etc.?

Perhaps thsi would help:-
Code:
filename=/etc/profile                  # Just as an example
E_seconds=$(stat -c %Y $filename)
timestamp=$(date -d"@$E_seconds" '+%a %d %b %Y %r %p %Z')

echo "Timestamp is \"$timestamp\" for file \"$filename\""

If you build that into a loop called in by your find, that might do it.
(converting them only to display)

As for storing the values as an array, would you be better with an associative array? Have a look at the bash manual page for a description. Basically you could then map the filename to the timestamp as a pair of items keyed by filename (timestamp may not be unique)


Moving on from that, what do you plan to do with the timestamp values? if you are looking to sort them, process them, get items based on a date range, then you would be better storing them as either seconds from the Epoch or using a format such as YYYYMoDDHHMiSS so that it makes sense to numeric comparisons.

Computer code is not easy with human format dates, so one of the above could help tremendously. If you store the value as seconds, then you can display it whenever you need to by calling the date command above.



I hope that this helps,
Robin
 

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LEARN ABOUT PHP

date_sunrise

DATE_SUNRISE(3) 							 1							   DATE_SUNRISE(3)

date_sunrise - Returns time of sunrise for a given day and location

SYNOPSIS

       mixed  date_sunrise  (int   $timestamp, [int  $format = SUNFUNCS_RET_STRING], [float  $latitude = ini_get("date.default_latitude")], [float
       $longitude = ini_get("date.default_longitude")], [float	$zenith = ini_get("date.sunrise_zenith")], [float  $gmt_offset])

DESCRIPTION

       date_sunrise(3) returns the sunrise time for a given day (specified as a $timestamp) and location.

PARAMETERS

	      o $timestamp
		- The $timestamp of the day from which the sunrise time is taken.

	      o $format
		-

	      $format constants

	      +-----------------------+-------------------------------------------+
	      |       constant	      | 					  |
	      | 		      | 					  |
	      | 		      | 	       description		  |
	      | 		      | 					  |
	      | 		      | 		 example		  |
	      | 		      | 					  |
	      +-----------------------+-------------------------------------------+
	      | SUNFUNCS_RET_STRING   | 					  |
	      | 		      | 					  |
	      | 		      |       returns the result as string	  |
	      | 		      | 					  |
	      | 		      | 		  16:46 		  |
	      | 		      | 					  |
	      | SUNFUNCS_RET_DOUBLE   | 					  |
	      | 		      | 					  |
	      | 		      |        returns the result as float	  |
	      | 		      | 					  |
	      | 		      | 	       16.78243132		  |
	      | 		      | 					  |
	      |SUNFUNCS_RET_TIMESTAMP | 					  |
	      | 		      | 					  |
	      | 		      | returns the result as integer (timestamp) |
	      | 		      | 					  |
	      | 		      | 	       1095034606		  |
	      | 		      | 					  |
	      +-----------------------+-------------------------------------------+
	      o $latitude
		- Defaults to North, pass in a negative value for South. See also: date.default_latitude

	      o $longitude
		- Defaults to East, pass in a negative value for West. See also: date.default_longitude

	      o $zenith
		- Default: date.sunrise_zenith

	      o $gmtoffset
		- Specified in hours.

RETURN VALUES

	Returns the sunrise time in a specified $format on success or FALSE on failure.

ERRORS
/EXCEPTIONS
	Every call to a date/time function will generate a E_NOTICE if the time zone is not valid, and/or a E_STRICT or E_WARNING message if using
       the system settings or the $TZ environment variable. See also date_default_timezone_set(3)

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.1.0	|						    |
       |	|						    |
       |	|  Now	issues	the E_STRICT and E_NOTICE time zone |
       |	| errors.					    |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

       Example #1

	      date_sunrise(3) example

	      <?php

	      /* calculate the sunrise time for Lisbon, Portugal
	      Latitude: 38.4 North
	      Longitude: 9 West
	      Zenith ~= 90
	      offset: +1 GMT
	      */

	      echo date("D M d Y"). ', sunrise time : ' .date_sunrise(time(), SUNFUNCS_RET_STRING, 38.4, -9, 90, 1);

	      ?>

	      The above example will output something similar to:

	      Mon Dec 20 2004, sunrise time : 08:54

SEE ALSO

       date_sunset(3).

PHP Documentation Group 													   DATE_SUNRISE(3)
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