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Dynamic System Config in Magento


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System.xml

<delivery_shipping>
    <label>Select Delivery Days</label>
    <frontend_model>exportorder/options</frontend_model>
    <backend_model>adminhtml/system_config_backend_serialized_array</backend_model>
    <sort_order>1</sort_order>
    <show_in_default>1</show_in_default>
    <show_in_website>1</show_in_website>
    <show_in_store>1</show_in_store>
    <comment>Set delivery delay in days respective of shipping method</comment>
</delivery_shipping>

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