检查输入值是否等于整数然后不提交表单 [英] check if input value not equal to integer then don't submit form

问题描述

我有一个简单的php电子邮件表单，但我收到垃圾邮件。我添加了一个检查输入，用户必须填写输入。如果输入值等于12，那么提交表单，否则不要提交表单的弹出错误。（请做数学计算。）

 < form action =method =post> 
< input type =textname =nameplaceholder =namerequired> 
< input type =textname =emailplaceholder =emailrequired> 
< input type =textname =phoneplaceholder =phonerequired> 
 
< div class =check> 
< label> 6 x 2 =< / label> 
< input type =textname =not_robotrequired =required> 
< / div> 
 
< input type =submitvalue =submit> 
< / form> 
  

我使用下面的php方法：

  if（isset（$ _ POST ['not_robot']）！== 12&& isset（$ _ POST ['not_robot']）！==''）{
 echo'< script type =text / javascript> alert（请做数学运算，如果你是人类的话。）;< / script>'; 
} else {
 //电子邮件脚本
} 
  

当我提交表单时，错误弹出窗口会出现请做数学运算，如果你是人类，但在关闭弹出窗口后，它也会发送电子邮件。
任何帮助appreaciated谢谢

PS：如果检查方法可能使用javascript或jquery，这将是一个很大的帮助。

解决方案

尝试检查提交表单时的情况。使用下面的代码或链接 -

JSFiddle

a>

HTML代码 -

 < form action = method =post> 
< input type =textname =nameplaceholder =namerequired> 
< input type =textname =emailplaceholder =emailrequired> 
< input type =textname =phoneplaceholder =phonerequired> 
 
< div class =check> 
< label> 6 x 2 =< / label> 
< input type =textname =not_robotrequired =required> 
< / div> 
 
< input type =submitvalue =submit> 
< / form> 
  

JAVASCRIPT代码 -

  $（'form'）。submit（function（）{
 if（parseInt（$（'input [name =not_robot]'）。val（））== 12）{ 
返回true; 
} 
 else {
 alert（'您没有输入正确的值'）; 
返回false; 
} 
 }）; 
  

i have a simple php email form, but i am getting spam emails. I have added a check input, User have to fill the input. If input value equal to 12 then submit the form, otherwise don't submit the form with a popup error.(Please do the math.)

<form action="" method="post">
<input type="text" name="name" placeholder="name" required>
<input type="text" name="email" placeholder="email" required>
<input type="text" name="phone" placeholder="phone" required>

<div class="check">
   <label>6 x 2 =</label>
   <input type="text" name="not_robot" required="required">
</div>

<input type="submit" value="submit">
</form>

i am using php method below:

if(isset($_POST['not_robot']) !== 12 && isset($_POST['not_robot']) !== ''){
    echo '<script type="text/javascript">alert("Please do the math, if you are human.");</script>';
}else{
    //email script here
}

when i submit form, error popup appear saying "Please do the math, if you are human", but after i close the popup, it also send email. Any help appreaciated Thanks

P.S: if check method is possible using javascript or jquery it would be a great help.

解决方案

Try to check when submitting the form. Go with below code or link-

JSFiddle

HTML Code-

<form action="" method="post">
  <input type="text" name="name" placeholder="name" required>
  <input type="text" name="email" placeholder="email" required>
  <input type="text" name="phone" placeholder="phone" required>

  <div class="check">
    <label>6 x 2 =</label>
    <input type="text" name="not_robot" required="required">
  </div>

  <input type="submit" value="submit">
</form>

JAVASCRIPT Code-

$('form').submit(function() {
      if (parseInt($('input[name="not_robot"]').val()) == 12) {
        return true;
      }
      else{
        alert('You not enterd the correct value');
        return false;
      }
    });

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