PHP数组打印语句

Question

这是我的代码：

        if(is_file($userName.".txt")) {
            $userDetails = explode(',', file_get_contents($userName.".txt"));
            print($userDetails[0]);
            if ($password == $userDetails[0]) {
                print('Correct login');
            } else {
                print('Incorrect login');
            }
        }

我有以下文件：Simon.txt，内容如下：simonpassword，4,1 如果$ userName是'Simon'，那么当代码运行时，如何打印4而不是simonpassword：print（$ userDetails [0]）？

Answer 1

<?
$userName = "Simon";
$password = "simonpassword";
if(is_file($userName.".txt")) {
        $userDetails = explode(',', file_get_contents($userName.".txt"));
        print($userDetails[0]);
        if ($password == $userDetails[0]) {
            print('Correct login');
        } else {
            print('Incorrect login');
        }
    }
?>

这是Simon.txt

simonpassword,4,1

它有效。