Disable/Enable module in magento using system.xml in magento -


i know how disable module output in system config going system>configuration>advanced , setting <active>false</active> in etc/modules. want know how disable module using custom tab created using system.xml.

add code system.xml

<fields>     <enable translate="label">         <label>enable</label>         <frontend_type>select</frontend_type>         <source_model>adminhtml/system_config_source_yesno</source_model>         <sort_order>0</sort_order>         <show_in_default>1</show_in_default>         <show_in_website>1</show_in_website>         <show_in_store>1</show_in_store>         <comment>enable/disable module</comment>     </enable> </fields>

and check in code: before first action in module.(this might in cron.php or observer.php or indexcontroller) 

$isenabled = mage::getstoreconfig('section_name/group_name/enable'); if (!$isenabled) {     return; }

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