src/app/code/community/StackExchange/DisableAdvancedSearch/etc/config.xml
<?xml version="1.0" encoding="UTF-8"?>
<config>
<modules>
<StackExchange_DisableAdvancedSearch>
<version>1.0.0</version>
</StackExchange_DisableAdvancedSearch>
</modules>
<global>
<helpers>
<stackexchange_disable_advancedsearch>
<class>StackExchange_DisableAdvancedSearch_Helper</class>
</stackexchange_disable_advancedsearch>
</helpers>
<models>
<stackexchange_disable_advancedsearch>
<class>StackExchange_DisableAdvancedSearch_Model</class>
</stackexchange_disable_advancedsearch>
</models>
</global>
<frontend>
<events>
<controller_action_predispatch_catalogsearch_advanced_index>
<observers>
<stackexchange_disable_advancedsearch_index>
<class>stackexchange_disable_advancedsearch/observer</class>
<method>disableAdvancedSearch</method>
</stackexchange_disable_advancedsearch_index>
</observers>
</controller_action_predispatch_catalogsearch_advanced_index>
<controller_action_predispatch_catalogsearch_advanced_result>
<observers>
<stackexchange_disable_advancedsearch_results>
<class>stackexchange_disable_advancedsearch/observer</class>
<method>disableAdvancedSearch</method>
</stackexchange_disable_advancedsearch_results>
</observers>
</controller_action_predispatch_catalogsearch_advanced_result>
</events>
</frontend>
<default>
<catalog>
<search>
<enable_advanced_search>1</enable_advanced_search>
</search>
</catalog>
</default>
</config>