&reftitle.runtime; The behaviour of the Apache PHP module is affected by settings in &php.ini;. Configuration settings from &php.ini; may be overridden by php_flag settings in the server configuration file or local &htaccess; files. php_flag engine off &Name; &Default; &Changeable; &Changelog; engine "1" INI_ALL child_terminate "0" INI_ALL last_modified "0" INI_ALL xbithack "0" INI_ALL &ini.php.constants; &ini.descriptions.title; engine bool Turns PHP parsing on or off. This directive is really only useful in the Apache module version of PHP. It is used by sites that would like to turn PHP parsing on and off on a per-directory or per-virtual server basis. By putting engine off in the appropriate places in the &httpd.conf; file, PHP can be enabled or disabled. child_terminate bool Specify whether PHP scripts may request child process termination on end of request, see also apache_child_terminate. last_modified bool Send PHP scripts modification date as Last-Modified: header for this request. xbithack bool Parse files with executable bit set as PHP regardless of their file ending.