php settings per application

How I can set some PHP parameters (not Apache parameters) per application without changing global php.ini file?

If I have two apps:

/var/www/app1

/var/www/app2

I need to set different memory_limit, session timeout or some other parameter for APP1 but with no effect to APP2. Is there possibility to use some local con开发者_运维技巧fig file (similar to .htaccess) in folders that are related to this changes?

You can set in .htaccess PHP flags in following way:

php_flag   session.use_cookies  off 
php_value  include_path         ".:/usr/local/lib/php"

Here you have a manual: How to change configuration settings

php_value        name  value
php_flag         name  on|off
php_admin_value  name  value
php_admin_flag   name  on|off

you can do it in apache conf's with php_value or php_ini_filename in VirtualHost/Directory tab