Parse error: syntax error, unexpected T_VARIABLE

Configuration:

Drupal 4.7.6
Apache 2.0.55
PHP 4.4.2-1.1
MySQL 5.0.24a-Debian_9-log
Charset utf8

Upon uploading the Timesheet module to /modules/timesheet, I get the following error:

Parse error: syntax error, unexpected T_VARIABLE, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /var/www/mypath/modules/timesheet/timesheet_legacy.inc on line 32

Lines 30-40 from timesheet_legacy.inc:

class timesheet {

  $_uid;
  $_tid;
  $_lid;
  $_default_hours;
  $_timesheet;
  $_submit_date;
  $_approve_date;
  $_end_date;
  $_days_left;  

This occurs independently of whether or not the tables have been created or fpdf uploaded into the modules/timesheet folder in advance.