Countdown function to send verification code when registering via mobile phone

In many cases, no matter what you register, there will be a verification code, and there is also a countdown function. The editor of this article will share with you a simple example of a countdown for sending a verification code during mobile phone registration. It has a very good reference value. Let’s follow the editor to take a look. I hope it can help others.

is as follows:

()这里用的是input做的点击发送验证码
<input type="number" class="input" name="mobile" placeholder="手机号" style="border: none"

<input class="hui_kuang"style="width: 30%;text-align: center;height: 42px"onclick="setTime(this)" value=&#39;获取验证码&#39;>
<script>
　　
//页面初始化获取倒计时数字（避免在倒计时时用户刷新浏览器导致倒计时归零）
 var $getCodeInput = $(".hui_kuang");
 var sessionCountdown = sessionStorage.getItem("countdown");
 if (!sessionCountdown) {
  $(".hui_kuang").val("获取验证码")
 } else {
  $(".hui_kuang").val("重新发送(" + sessionCountdown + ")");
  setCode($getCodeInput, sessionCountdown);
 }
 //获取验证码
 function setTime() {
  var remobile = $("#registForm input[name=&#39;mobile&#39;]").val();
  if (!remobile) {
   alert("请输入手机号码")
   return;

  }
  if (!(/^1[3|4|5|8][0-9]\d{4,8}$/.test(remobile))) {
   alert("请输入有效的手机号码")
   return;
  } else {
   setCode($getCodeInput, 60);
  }

 }
 //发送验证码倒计时
 function setCode($getCodeInput, countdown) {
  if (countdown == 0) {
   $getCodeInput.attr(&#39;disabled&#39;, false);
//   $getCodeInput.removeAttribute("disabled");
   $getCodeInput.val("获取验证码");
   sessionStorage.removeItem("countdown");
   return;
  } else {
   $getCodeInput.attr(&#39;disabled&#39;, true);
   $getCodeInput.val("重新发送(" + countdown + ")");
   countdown--;
  }
  sessionStorage.setItem("countdown", countdown);
  window.setTimeout(function () {
   setCode($getCodeInput, countdown);
  }, 1000);
 }
</script>

Have you learned it? The ideas are the same and I hope it can help everyone.

Related recommendations:

How to use PHP to send SMS verification codes

thinkphp verification code login function implementation example

JS method to implement verification code

The above is the detailed content of Countdown function to send verification code when registering via mobile phone. For more information, please follow other related articles on the PHP Chinese website!