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Full Discussion: Calculate datediff
Top Forums Shell Programming and Scripting Calculate datediff Post 303004591 by before4 on Thursday 5th of October 2017 02:34:32 AM
Old 10-05-2017
Calculate datediff

I'm trying to calculate datediff between string from filename and current date,
i got problem with storing variable from date command

Code:
now=$(date  +"%s")
echo "NOW = ${now}";
file=$(ls -1Ap *.txt|grep -v /\$ |tail -1)
echo "file name is $file"
#filename 201710030549.txt

y=$(echo $file|cut -c 1-4)
m=$(echo $file|cut -c 5-6)
d=$(echo $file|cut -c 7-8)

in="$m/${d}/${y}"

$fdate=`$(date -d "$in" +"%s")`
echo "file date = $fdate"
echo $(( (now - fdate) / 86400 )) days

error result
Code:
NOW = 1507184947
file name is 201710050619.txt
./test.sh: line 14: 1507136400: command not found
./test.sh: line 14: =: command not found
file date = 
17444 days

 

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DATETIME.SETTIMESTAMP(3)						 1						  DATETIME.SETTIMESTAMP(3)

DateTime::setTimestamp - Sets the date and time based on an Unix timestamp

       Object oriented style

SYNOPSIS
public DateTime DateTime::setTimestamp (int $unixtimestamp) DESCRIPTION
Procedural style DateTime date_timestamp_set (DateTime $object, int $unixtimestamp) Sets the date and time based on an Unix timestamp. PARAMETERS
o $object -Procedural style only: A DateTime object returned by date_create(3). The function modifies this object. o $unixtimestamp - Unix timestamp representing the date. RETURN VALUES
Returns the DateTime object for method chaining or FALSE on failure. EXAMPLES
Example #1 DateTime.setTimestamp(3) example Object oriented style <?php $date = new DateTime(); echo $date->format('U = Y-m-d H:i:s') . " "; $date->setTimestamp(1171502725); echo $date->format('U = Y-m-d H:i:s') . " "; ?> Procedural style <?php $date = date_create(); echo date_format($date, 'U = Y-m-d H:i:s') . " "; date_timestamp_set($date, 1171502725); echo date_format($date, 'U = Y-m-d H:i:s') . " "; ?> The above examples will output something similar to: 1272508903 = 2010-04-28 22:41:43 1171502725 = 2007-02-14 20:25:25 NOTES
Using the Unix timestamp format to construct a new DateTime object is an alternative when using PHP 5.2, as shown in the example below. Example #2 DateTime.setTimestamp(3) alternative in PHP 5.2 <?php $ts = 1171502725; $date = new DateTime("@$ts"); echo $date->format('U = Y-m-d H:i:s') . " "; ?> The above example will output something similar to: 1171502725 = 2007-02-14 20:25:25 SEE ALSO
DateTime.getTimestamp(3). PHP Documentation Group DATETIME.SETTIMESTAMP(3)
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