&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" PHP_INI_ALL Available since PHP 4.0.5. child_terminate "0" PHP_INI_ALL Available since PHP 4.0.5. last_modified "0" PHP_INI_ALL Available since PHP 4.0.5. xbithack "0" PHP_INI_ALL Available since PHP 4.0.5. &ini.php.constants; &ini.descriptions.title; engine boolean 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 boolean Specify whether PHP scripts may request child process termination on end of request, see also apache_child_terminate. last_modified boolean Send PHP scripts modification date as Last-Modified: header for this request. xbithack boolean Parse files with executable bit set as PHP regardless of their file ending.