[PHP知识库]php随机生成包含数字、大小写英文字母的密码实例

public static function createRandPassword($intPwLength)
    {
        $arrRand = array_merge(range(0, 9), range('a', 'z'), range('A', 'Z'));
        $strRandPwd = '';
        $intArrLen = count($arrRand);
        for ($i = 0; $i < $intPwLength; $i++) {
            $intRand = mt_rand(0, $intArrLen-1);  //mt_rand(min,max)函数返回随机整数
            $strRandPwd .= $arrRand[$intRand];
        }
        return $strRandPwd;
    }

?优化后：可保证密码英文大小写字母都含有。

public static function createRandPassword($intPwLength)
    {
        $arrRand = array_merge(range(0, 9), range('a', 'z'), range('A', 'Z'));
        $strRandPwd = '';
        $intArrLen = count($arrRand);
        for ($i = 0; $i < $intPwLength; $i++) {
            $intRand = mt_rand(0, $intArrLen-1);  //mt_rand(min,max)函数返回随机整数
            $strRandPwd .= $arrRand[$intRand];
        }
        $strRandPwd = ucfirst($strRandPwd);
        return $strRandPwd;
    }