表单验证时的错误信息应该被隐藏

我有一个关于使用codeigniter进行表单验证的问题。在用户按下"提交"按钮后，他们得到了预期的错误信息，但我也得到了一个错误信息(下图)。显示错误消息的值是隐藏的。我不相信这是罪魁祸首，因为我尝试了没有隐藏值的语法，它没有工作。我做错了什么?谢谢所有人。

A PHP Error was encountered
Severity: Notice
Message: Undefined variable: id
Filename: views/view_information.php
Line Number: 46
A PHP Error was encountered
Severity: Notice
Message: Undefined variable: year
Filename: views/view_information.php
Line Number: 48
A PHP Error was encountered
Severity: Notice
Message: Undefined variable: make
Filename: views/view_information.php
Line Number: 49
A PHP Error was encountered
Severity: Notice
Message: Undefined variable: model
Filename: views/view_information.php
Line Number: 50

我的观点

<style type="text/css" media="screen">
    label{display: block}
</style>
<?php
    echo (isset($error)) ? $error : "";
    if(isset($carprices) && !is_null($carprices))
    {
        echo "Car# " . $carprices[0]->id . "<br />";
        foreach ($carprices as $prices)
        {
            echo 'ID Of Vehicle: '.$prices->id.'<br>';
            echo 'Year: '.$prices->year.'<br>';
            echo 'Make: '.$prices->make.'<br>';
            echo 'Model: '.$prices->model.'<br>';
            echo '<hr>';
            $id = $prices->id;
            $year = $prices->year;
            $make = $prices->make;
            $model = $prices->model;
            echo "$id".'<br>';
        }
    }
    /*
        foreach($updateprices as $row){
            $id = $row->id;
            $year = $row->year;
            $make = $row->make;
            $model = $row->model;
        }
    */
    echo form_open('site/form_validate_cars'); 
    echo validation_errors();
    $data = array(
        'cardescription_id'    => "$id",
        'caruser_id' => "5", // hard-coded in
        'year'  => "$year",
        'make'  => "$make",
        'model' => "$model"
    );
    echo form_hidden($data);
    echo form_label('Value:','value');
    $data = array(
        'name' => 'value',
        'id' => 'value',
        'value' => set_value('value')
    );
    echo form_input($data);
    // -----------------
    echo form_label('Exterior Color:','exterior_color');
    $data = array(
        'name' => 'exterior_color',
        'id' => 'exterior_color',
        'value' => set_value('exterior_color')
    );
    echo form_input($data);
    // -----------------
    echo form_label('Interior Color', 'interior_color');
    $data = array(
        'name' => 'interior_color',
        'id' => 'interior_color',
        'value' => set_value('interior_color')
    );
    echo form_input($data);
    // -----------------
    echo form_label('Mileage:','mileage');
    $data = array(
        'name' => 'mileage',
        'id' => 'mileage',
        'value' => set_value('mileage')
    );
    echo form_input($data);
    // -----------------
    // removed echo-only <tr>s on fuel type, state and transmission
    // -----------------
    echo form_label('State:','state');
    $data = array(
        'Texas' => 'Texas',
        'California' => 'California',
        'Florida' => 'Florida',
        'Nevada' => 'Nevada'
    );
    echo form_dropdown('State',$data,'California');
    echo '<br>';
    echo form_submit('SubmitDealerInfo','Submit!');
    echo form_close();
?>