$contents = explode("\n", $contents);

$contents=array_trim($contents);

$lineCount = count($contents);

echo $contents[0];   --> returns: "2"


print_r($contents) returns:
Array
(
    [0] => 2305
    [1] => Addresses the issue "CSR is not displayed after generating one"
    [2] => Ensim Pro X for Linux
    [3] => 10.0.0
}