php总结

数组随机取

function array_random ($number, $ary) {
    // @number 需要取多少个元素
    // @ary  原数组
    $final = [];
    while (count($final) < $number) {
        $element = $ary[array_rand($ary, 1)];
        in_array($element, $final) OR $final[] = $element;
    }
    return $final;
}
// $number 要小于 数组长度 $number < count($ary);
$final = array_random(3, $ary);
$ary = ['php', 'java', 'python', 'c#', 'c++', 'ruby'];
print_r($final);