php生成随机函数示例

<?php

$a=sp_random_score();
echo $a;
// 生成随机评分,在数组中随机产生一个值
function sp_random_score($len = 1) {
    $chars = array(
        "3.5", "3.6", "3.7","3.8","3.9","4.0","4.1", "4.2", "4.3", "4.4","4.5", "4.6","4.7", "4.8","4.9", "5.0"
    );
    $charsLen = count($chars) - 1;
    shuffle($chars);// 将数组打乱
    $output = "";
    for ($i = 0; $i < $len; $i++) {
        $output .= $chars[mt_rand(0, $charsLen)];
        
    }
    return $output;
}

 ?>