June 23, 2001PHP 4.0.6Dec. 10, 2001PHP 4.1.0Dec. 26, 2001PHP 4.1.1Feb. 27, 2002PHP 4.1.2Apr. 22, 2002PHP 4.2.0May 13, 2002PHP 4.2.1July 22, 2002PHP 4.2.2SoonishPHP 4.2.3AfterishPHP 4.3.0Next YearishPHP 5.0