Not sure if this is the best or correct way of handling CSV file imports, but it worked for me.

here is an example of opening a csv and importing the content into a class, you will need to create a class and the add function. But this can be customised to do whatever you need with the csv data.

// read the csv
$row = 1;
if (($handle = fopen("csv/myfile.csv", "r")) !== FALSE) {
    while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
        $num = count($data);
        echo "<p> $num fields in line $row: <br /></p>\n";
        $row++;

	    $class = new class;

        for ($c=0; $c < $num; $c++) {
            echo $data[$c] . "<br />\n";

            if($c == 0) {
            	$class->title = $data[$c];
            	echo "title: " . $class->title . "<br>";
            }
            if($c == 1) {
            	$class->data2 = trim($data[$c]);
            	echo "data2: " . $class->data2 . "<br>";
            }
            if($c == 2) {
            	$class->data3 = trim($data[$c]);
            	echo "gics_code: " . $class->data3 . "<br>";
            }

        }

        if($class->title > " ") {
        	if($class->add()) {
        		echo "Added<br>";
        	}
    	}

    }
    fclose($handle);
}