Creating a class for variables within plugin; passing variables from one function to another

Since global usage is frowned upon, I'm trying to create a class that has variables which are defined by data obtained from an fgetcsv function. I'm doing this so I can pass these variables to various other functions in this plugin that need access to them.

What I have posted below breaks the function, and doesn't display any of the output that previously functioned.

What do I want my class to contain, the function that is defining the variables? Where do I define them?

class My_Class{

    var $name;
    var $quanid;
    var $table;




function open_csv_file() {
    ob_start();
    $handle = fopen( plugin_dir_path( __FILE__ )  . 'test.csv' , "r" );  
    $data = fgetcsv($handle, 1000, ",");
    echo('<br>');
    echo('<table id="table">    <tr class="hidden">
        <th><b>
            Name</b>
        </th>
        <th><b>
            Cheese</b>
        </th>
        <th><b>
            Price</b>
        </th>
        <th><b>Vote</b>
        </th>
    </tr>
    <tbody>');
    $a = 1;
    while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
        $this->name = $data[0];
        $this->quanid = $data[2];
        $this->table = $data[3];
        unset($data[2]);
        unset($data[3]);
        $cssId = 'row-'.$a;
        $a++;
        //generate HTML
        echo('<tr>');
        foreach ($data as $index=>$val) {
            echo('<td>');
            echo htmlentities($val, ENT_QUOTES);
            echo('</td>');  
        }
        global $wpdb;
        $sql = "SELECT ItemID, Price 
        FROM {$this->$table}
        WHERE ItemID = %d
        GROUP BY Price
        ORDER BY COUNT(*) DESC LIMIT 1";
        $results = $wpdb->get_var( $wpdb->prepare( $sql, $this->quanid));

        echo('<td>');
        print_r($results);
        echo('</td>');
        echo('<td>
            <button class="toggler" data-prod-cat="' . $cssId . '">Vote</button>
        </td>');
        echo('</tr>');
        echo('<tr class="cat' . $cssId . ' hidden" style="display:none">');
        echo('<td colspan="4" style="white-space: nowrap">Enter ' . $this->name . ' Price:
        <form action="" name="form' . $this->quanid . '" method="post"><input type="text" id="' . $this->quanid . '" maxlength="4" name="' . $this->quanid . '" value="price_input" class="input" />

        <button id="submit" name="submit" class="submit" type="submit" value="Submit">Submit</button></form>
        <?php

?>
        </td>
        </tr>');
        wp_nonce_field('price_input');
    }
    echo("</table>");
    return ob_get_clean();
    fclose($handle);
    }
}