Why Does \'Undefined Variable\' Error Occur When Passing Data from CodeIgniter Controller to View?

Codeigniter Data Transference from Controller to View

Question: An undefined variable error appears when attempting to pass data ($data) from the Poll controller to the results_view view. Why does this occur?

Here is the relevant controller code:

<code class="php">public function results()
{
    echo "These are the results";
    $data = "hello";
    $this->load->view('results_view', $data);
}</code>

Answer: The issue stems from $data not being defined as an array or an object, which is required when passing data to a view.

To resolve this, define $data as an array or an object:

<code class="php">$data = array(
    'message' => 'hello'
);</code>

The modified controller code:

<code class="php">public function results()
{
    echo "These are the results";
    $data = array(
        'message' => 'hello'
    );
    $this->load->view('results_view', $data);
}</code>

To access the data in the view, use the following syntax:

<code class="php">//results_view.php
echo $message;</code>

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