Brian Dunning's FileMaker Custom Functions

IsTimestamp ( _var )

return timestamp in number of seconds if valid or nothing if invalid

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Rewolfer   Rewolfer
http://rewolfer.de

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  Sample input:
IsTimestamp ( "2003-12-19 12:04:10" )
IsTimestamp ( "19.12.2003 12:04:10" )
IsTimestamp ( "12/19/2003 12:04:10" )
IsTimestamp ( "12/19/2003 1:04:10 PM" )
IsTimestamp ( "19/12/2003 12:04:10" )
  Sample output:
63207432250

  Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

/*=================================================

FORM: IsTimestamp ( _var )

PURPOSE: return timestamp in number of seconds if valid

PARAMETER: _var type: unknown value: unknown

RESULT: valid timestamp in seconds since 0001-01-01 00:00:00 or nothing if invalid

DEPENDENCY: IsDate() ; IsTimeOfDay()

NOTE: to import timestamps with different formats set the auto calculation of the timestamp field to "GetAsTimestamp ( IsTimestamp ( Self ))"
and it will convert the import format to the current setting
"11/23/2003 12:11" => "2003-11-23 12:11"
if you'd like to accept British timestamps read the note in IsDate()

EXAMPLE: IsTimestamp ( "19.12.2003 12:04:10" ) => 63207432250
IsTimestamp ( "12/19/2003 1:04:10 PM" ) => 63207432250
IsTimestamp ( "19.14.2003 12:04:10" ) => "" (invalid date)

HISTORY: 2012-04-16 [205814] 1.00 tsw outsourced timestamp validation
2012-04-19 [144827] 1.10 tsw cascaded casing to speed things up
2012-04-26 [080453] 1.20 tsw broader AM/PM-integration

DEVELOPER: tsw @ http://rewolfer.de

=================================================*/

 

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