生成一个指定长度的随机字符串

2023/07/11 常用函数 1191 views 
/**
 * 产生一个指定长度的随机字符串,并返回给用户
 * @param type $len 产生字符串的长度
 * @return string   随机字符串
 */
function genRandomString($len = 6)
{
    $chars = array(
        "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k",
        "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v",
        "w", "x", "y", "z", "A", "B", "C", "D", "E", "F", "G",
        "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R",
        "S", "T", "U", "V", "W", "X", "Y", "Z", "0", "1", "2",
        "3", "4", "5", "6", "7", "8", "9",
    );
    $charsLen = count($chars) - 1;
    // 将数组打乱
    shuffle($chars);
    $output = "";
    for ($i = 0; $i < $len; $i++) {
        $output .= $chars[mt_rand(0, $charsLen)];
    }
    return $output;
}


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