1、定义前台获取验证码的html模板

<div class="form-group">
    <input type="text" class="form-control"  name="phone" id="phone" placeholder="手机号码" onfocus="this.placeholder=''" onblur="this.placeholder='手机号码'">
    <p class="col-lg-12 col-md-12 col-sm-12 find">
        <input type="text" class="form-control pull-left" id="code" name="code" placeholder="验证码" onfocus="this.placeholder=''" onblur="this.placeholder='验证码'">
        <button type="button" id="send" class="btn btn-block btn-outline btn-default pull-right acquire">点击获取</button>
    </p>
    <button type="button" id="submit" class="btn btn-block btn-outline btn-primary">找回密码</button>
    <p>
        <span class="fgt">还没有账号？<a href="{:url('/web/Index/register')}">免费注册</a></span>
    </p>
</div>

2、当点击获取验证码的按钮，则发送手机号到后台

var countdown = 60;
var tt;
$("#send").click(function(){
    //验证座机号码的正则
    var isPhone = /^([0-9]{3,4}-)?[0-9]{7,8}$/;
    //验证手机号码的正则
    var isMob=/^((\+?86)|(\(\+86\)))?(13[012356789][0-9]{8}|15[012356789][0-9]{8}|18[012356789][0-9]{8}|147[0-9]{8}|1349[0-9]{7})$/;
    var phone_str=$("#phone").val();
    phone_str = $.trim(phone_str);
    if(phone_str==""){
        toastr.error('手机号码必填');
        return;
        //如果当不是手机号码或者座机号码时,则返回错误
    }else if(!(isPhone.test(phone_str)||isMob.test(phone_str))){
        toastrr.error('手机号码格式错误');
        return;
    }
    //向验证码函数发送手机号
    var url = "{:url('/user/Login/sendPwdCode')}";
    $.post(url,{mobile:phone_str},function(data){
        if(data.code ==1){
            toastr.success('发送成功，请注意查收');
            $("#send").attr("disabled","true");
            tt = setInterval(function() {
                //10分钟修改一次按钮状态,并调用从新获取验证码的函数
                settime();
            },1000)
        }else {
            toastr.error(data.msg);
        }
    })
});
//修改按钮状态的函数
function settime() {
    if (countdown == 0) {
        $("#send").val("没收到？重新获取");
        $("#send").removeAttr("disabled");
        countdown = 60;
        clearInterval(tt);
    } else {
        $("#send").val(countdown);
        countdown--;
    }
}

3、前台发送请求到后台获取验证码的函数

//发送验证码 ，找回密码
function sendPwdCode($mobile, $app = false)
{
    $umsg = findById("user", array("name" => $mobile), "id");
    if (empty($umsg["data"])) {
        if ($app) {
            return json(array('code' => '0', 'msg' => '没有找到该账号，请重新输入', 'data' => ''));
        } else {
            return array('code' => '0', 'msg' => '没有找到该账号，请重新输入', 'data' => '');
        }
    }
    //判断当前手机号一个小时内已经发送了多少
    $start_time = time() - 3600;
    $map = array(
        'addtime' => array('gt', $start_time),
        'mobile' => $mobile,
        'type' => 0
    );
    $msg = getDataList('SmsLog', $map, 'id');
    if ($msg['code'] == '1') {
        $count = count($msg['data']);
    }
    //一个小时内不能超过三次
    if ($count >= 3) {
        if ($app) {
            return json(array('code' => '0', 'msg' => '发送次数过于频繁，请一个小时后再试', 'data' => ''));
        } else {
            return array('code' => '0', 'msg' => '发送次数过于频繁，请一个小时后再试', 'data' => '');
        }
    }
    //四位随机数字验证码
    $code = get_random(4);
    $tplId = config('sms_tpl_id.findcode');
    $smsdata = array('code'=>$code);
    // $value = "#code#=" . $code;
    //  $result = sendSms($mobile, $value, '49047');
    $result = alsms($tplId,$mobile,$smsdata);
    if ($result['code'] == "1") {
        //把该条数据保存到数据库
        //发送成功,做记录
        $data = array(
            'mobile' => $mobile,
            'msg' => $code,
            'type' => '0',
            'addtime' => time()
        );
        saveData('SmsLog', $data);
        if ($app) {
            return json(array('code' => '1', 'msg' => '发送成功，十分钟内有效', 'data' => '发送成功，十分钟内有效'));
        } else {
            return array('code' => '1', 'msg' => '发送成功，十分钟内有效', 'data' => '发送成功，十分钟内有效');
        }
    } else {
        if ($app) {
            return json(array('code' => '0', 'msg' => "发送失败", 'data' => '发送失败'));
        } else {
            return array('code' => '0', 'msg' => $result['msg'], 'data' => $result['msg']);
        }
    }
}   

4、当前台点击找回密码按钮，则发送手机号和验证码到后台判断是否符合，如果前台收到后台验证成功的参数，则跳转到新的密码设置页面

$("#submit").click(function () {
        var isPhone = /^([0-9]{3,4}-)?[0-9]{7,8}$/;
        var isMob=/^((\+?86)|(\(\+86\)))?(13[012356789][0-9]{8}|15[012356789][0-9]{8}|18[012356789][0-9]{8}|147[0-9]{8}|1349[0-9]{7})$/;
        var phone_str=$("#phone").val();
        phone_str = $.trim(phone_str);
        if(phone_str==""){
            toastr.error('手机号码必填');
            return;
        }else if(!(isPhone.test(phone_str)||isMob.test(phone_str))){
            toastr.error('电话号码格式错误');
            return;
        }
        var code = $('#code').val();
        code = $.trim(code);
        if(code ==''){
            toastr.error('验证码必填');
            return ;
        }
        var url = "{:url('/user/Login/checkCode')}";
        $.post(url, {'phone':phone_str,'code':code}, function (data) {
            if(data.code ==1){
                toastr.success('验证成功，请输入新密码');
                var phone = data.phone;
                setTimeout("go("+phone+")",1000);
              //  location.href="{:url('/web/Index/newPwd')}?phone="+phone;
            }else {
                toastr.error(data.msg);
            }
        });

    });

});
//跳转到新的密码设置页面，并将手机号携带过去以便获取手机号进行设置
function go(phone){
    location.href="{:url('/web/Index/newPwd')}?phone="+phone;
}

5、后台验证验证码是否正确的函数

//找回密码功能，验证验证码
function checkCode($app = false)
{
    $phone = input('phone', '');
    $code = input('code', '');
    //
    $res = verifySmsCode($phone, $code, 600);
    if ($res['code'] == '0') {
        if (empty($umsg["data"])) {
            if ($app) {
                return json(array('code' => '0', 'msg' => $res['msg'], 'data' => ''));
            } else {
                return array('code' => '0', 'msg' => $res['msg'], 'data' => '');
            }
        }
    } else {
        if ($app) {
            return json(array('code' => 1, 'phone' => $phone));
        } else {
            return array('code' => 1, 'phone' => $phone);
        }
    }
}

6、定义新的密码设置页面的表单

<form action="{:url('/user/User/findPassword')}" method="post" id="reset">
    <input type="password" style="margin-bottom:14px;" class="form-control"  name="password" id="password" placeholder="新密码（6-20位字母、数字、符号组合）" onfocus="this.placeholder=''" onblur="this.placeholder='新密码（6-20位字母、数字、符号组合）'">
    < input type="password" style="margin-bottom:14px;" class="form-control"  name="cfmpassword" id="cfmpassword" placeholder="确认密码" onfocus="this.placeholder=''" onblur="this.placeholder='确认密码'">
    <input type="hidden" id="phone" name="phone" value="{$phone|default=''}">
</form>

7、设置新密码的js提交函数

$("#btnreset").click(function () {
    var password = $("#password").val();
    var cfmpassword = $.trim($("#cfmpassword").val());
    password = $.trim(password);
    if(password==""){
        toastr.error('新密码必填');
        return;
    }
    if(password !==cfmpassword){
        toastr.error('两次密码不一致');
        return;
    }
    var regExp=/^(?![\d]+$)(?![a-zA-Z]+$)(?![^\da-zA-Z]+$).{6,20}$/;
    if(!regExp.test(password)){
        toastr.error('密码必须为6-20位字母、数字或符号组合');
        return;
    }
    var pwd = $("#password").val();
    var cfmpwd = $("#cfmpassword").val();
    var phone = $("#phone").val();
    var url = "{:url('/web/Index/findPassword')}" ;
    $.post(url, {'phone':phone,'password':pwd,'cfmpassword':cfmpwd}, function(data){
        if (data.code == 1) {
            toastr.success('重置密码成功，请用新密码登录');
            setTimeout('go()',1000);

        } else {
           toastr.error(data.msg);
        }
    });
});
//当返回新密码设置成功后，则跳转到登陆账号页面
function go(){
    location.href="{:url('/web/Index/login')}";
}

8、当点击保存新密码后，进入新密码保存函数

//保存新密码
function findPassword($app = false)
{
    try{
        $phone = input('phone', '');
        $pwd = input('password');
        $pwd = trim($pwd);
        $repwd = input('cfmpassword');
        $repwd = trim($repwd);
        if (empty($phone)) {
            if ($app) {
                return json(array('code' => 0, 'msg' => '电话号码不能为空'));
            } else {
                return array('code' => 0, 'msg' => '电话号码不能为空');
            }
        }
        if ($pwd != $repwd) {
            if ($app) {
                return json(array('code' => 0, 'msg' => '新密码和确认密码不一致'));
            } else {
                return array('code' => 0, 'msg' => '新密码和确认密码不一致');
            }
        }
        $phone =think_decrypt($phone); //解密一下
        $rlt = saveDataByCon("user", array("password" => md5($pwd)), array("name" => $phone));
        if ($app) {
            return json($rlt);
        } else {
            return $rlt;
        }
    }catch (\Exception $e) {
        //记录事务
        c_Log($e);
        return array("code" => 0, "msg" =>'找回密码失败','data'=>'');
    }
}