Get file contents using .env variable Lumen

Question

Ok, so I have a .env variable CSV_FILE=~/sites/computer-availability/storage/app/WAV_SUM.csv

I want to load it into my controller so that I can parse it into an array. I tried env("app.CSV_FILE"); but that just gives me a string of the file path. Not what I'm wanting. I need the files contents.

How could I go about loading the data from the CSV file using the .env variable?

I have tried the following

$csv_data = Storage::get(env("WAV_SUM.csv");

$csv_data = env("app.CSV_FILE");

$csv_data = config("app.CSV_FILE");

Answer 1

This is from the official php documentation and slightly altered

<?php
$row = 1;
$csv = getenv('app.CSV_FILE');
$csv = str_replace("~/sites/computer-availability/","",$csv);
if (($handle = fopen($csv, "r")) !== FALSE) {
    while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
        $num = count($data);
        echo "<p> $num fields in line $row: <br /></p>\n";
        $row++;
        for ($c=0; $c < $num; $c++) {
            echo $data[$c] . "<br />\n";
        }
    }
    fclose($handle);
}
?>