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Validate $key argument with empty instead with is_null
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@ -34,7 +34,7 @@ function config($key, $default = NULL)
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/** @var EA_Controller $CI */
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$CI = &get_instance();
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if (is_null($key))
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if (empty($key))
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{
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throw new InvalidArgumentException('The $key argument cannot be empty.');
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}
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