PHP if statement will ALWAYS fire as true [duplicate]

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• PHP: “Notice: Undefined variable” and “Notice: Undefined index” 12 answers

I have the following php code for a game I'm making. The if statement always fires true no matter what the scoreField or highScore equals.

$score = $_POST["scoreField"];
$savefile = fopen("SaveFile.txt", "r") or die("Unable to open file!");
$highScore = fread($savefile,filesize("SaveFile.txt"));
fclose($savefile);
if (intval($score) > intval($highscore)) {
    $savingfile = fopen("SaveFile.txt", "w");
    fwrite($savingfile, $score);
    fclose($file);
}

I also found out that if I change the > to a < it always fires false. I have been unable to find any answers that work.