<?php
    session_start();
    $handle = fopen("classificator.txt", "r");
    $i = 0;
    $aData = array();
    if($handle)
    {
        while(($line = fgets($handle, 4096)) !== false)
        {
            
            $sDeviceClass = substr($line, 0, 2);
          $sDeviceType = substr($line, 2, 2);
         $sDeviceStatus = substr($line, 5);
         $aData[] = array(
                         'class' => $sDeviceClass,
                         'type' => $sDeviceType,
                         'status' => $sDeviceStatus
                       );
            
            if(!feof($handle))
            {
//   echo "Error";
            }
        }
        fclose($handle);
    }
echo '<pre>';
print_r($aData);
echo '</pre>';
?>

$file = file_get_contents('./file.txt');
$array = explode("\n", $file);

$file = file('file.txt', FILE_SKIP_EMPTY_LINES);