<?xml version="1.0" encoding="utf-8"?>
<form>
    <fieldset name="general">
        <field name="match" type="comparator"/>
        <field name="value" type="textarea" 
            label="NR_PHPCODE" 
            description="NR_ASSIGN_PHP_DESC2"
            filter="raw"
            class="span12 input-full"
            rows="10"
            hint="return ($some_variable == 'some value');"
        />
    </fieldset>
</form>