Выдается ошибка при добавлении большого числа характеристик товара

При сохранении товара с большим числом характеристик выдается ошибка:

Warning: Unknown: Input variables exceeded 1000. To increase the limit change max_input_vars in php.ini. in Unknown on line 0
[ERROR#1][ERROR#2][ERROR#3][ERROR#4][ERROR#5][ERROR#6][ERROR#7][ERROR#8]{"hash":"9a4bbf1368bb2e7e97ed96ffe323d370","result":"success"}
session_start() [function.session-start]: Cannot send session cache limiter - headers already sent
Cannot modify header information - headers already sent
Cannot modify header information - headers already sent
Cannot modify header information - headers already sent
Cannot modify header information - headers already sent
Cannot modify header information - headers already sent
Cannot modify header information - headers already sent
#1 header(Content-Type: text/html; charset=utf-8) called at [C:OpenServerdomainssiteadmincludesinit.php:346]
#2 Init_admin->headers() called at [C:OpenServerdomainssiteadmincludesinit.php:106]
#3 Init_admin->init() called at [C:OpenServerdomainssiteadmindex.php:25]
#4 include_once(C:OpenServerdomainssiteadmindex.php) called at [C:OpenServerdomainssiteindex.php:39]
Cannot modify header information - headers already sent
#1 header(Content-Type: text/html; charset=utf-8) called at [C:OpenServerdomainssitepluginsjson.php:21]
#2 to_json(Array(...)) called at [C:OpenServerdomainssiteadmincludesvalidate.php:127]
#3 Validate_admin->result() called at [C:OpenServerdomainssiteadmincludesvalidate.php:116]
#4 Validate_admin->validate() called at [(null):0]
#5 call_user_func_array(Array(...), Array(...)) called at [C:OpenServerdomainssiteadmincludesframe.php:150]
#6 Frame_admin->__call(validate, Array(...)) called at [C:OpenServerdomainssiteadmincludesframe.php:196]
#7 Shop_admin->validate() called at [C:OpenServerdomainssiteadmincludesframe.php:196]
#8 Frame_admin->init() called at [C:OpenServerdomainssiteadmincludesinit.php:428]
#9 Init_admin->module() called at [C:OpenServerdomainssiteadmincludesinit.php:107]
#10 Init_admin->init() called at [C:OpenServerdomainssiteadmindex.php:25]
#11 include_once(C:OpenServerdomainssiteadmindex.php) called at [C:OpenServerdomainssiteindex.php:39]

Данная проблема решается при добавлении в файл .htaccess

<IfModule php5_module>
php_value max_input_vars 50000
php_value suhosin.request.max_vars 50000
php_value suhosin.post.max_vars 50000
</IfModule>