Asterisk recording IN/OUT script

vi /var/www/html/admin/modules/core/agi-bin/recordingcheck

$agi->set_variable("CALLFILENAME","g{$exten}-{$timestamp}-{$uniqueid}");
For OUT:
$agi->set_variable("CALLFILENAME","OUT{$exten['data']}-{$timestamp}-{$uniqueid}");
For IN:
$agi->set_variable("CALLFILENAME","IN{$exten['data']}-{$timestamp}-{$uniqueid}");