PHP - 如何从数组中随机获取内容

Question

how can i get something randomly from a array for example i have this array I want to grab one of those lines randomly how can I do that using PHP?

 $quizes = array(
        '3-1' => '2',
        '4+4' => '8',
        '7-5' => '2',
        '4+2' => '6',
        '9-3' => '6',
        '1+2' => '3',
        '9+9' => '18',
        '3+2' => '5',
        '2*3' => '6',
        '5*3' => '15',
        '6+6' => '12',
        '3+4' => '7',
        '7-4' => '3',
        '6+2' => '8',
        '3*2' => '6',
        '7+6' => '13',
        '1+1' => '2',
        '4*4' => '16',
        '10-3' => '7'
    );

What i have tried

$rand_keys = array_rand($quizes, 2);
echo $quizes[$rand_keys[0]] . "
";
echo $quizes[$rand_keys[1]] . "
";

but this only returns results such as 2 7, 15 2, 3 2 and more

Please help thank you

Answer 1

Well, you are getting exactly what you are asking for - value that belongs to randomly chosen key. To get key => value pair execute:

echo $rand_keys[0] . " => " . $quizes[$rand_keys[0]] . "
";

Of course you can format output however you'd like to.