成功提交php表单后清除表单字段

问题描述

我正在制作一个简单的表单，我面临的问题是当我提交表单时，值仍然存在于该字段中。我希望在SUCCESSFUL提交后清除它。请帮助。

这里是我的代码形式..

 < label class =w>计划：< / label> 
 < option value =>选择一个< / option> 
< option value =免费账户>免费账户< / option> 
< option value =高级帐户月度>高级帐户月度< / option> 
< option value =每年付费帐户>每年付费帐户< / option> 
< / select> 
< br> 
< label class =w>名字：< / label>< input name =firstnametype =textplaceholder =First Namerequired =requiredvalue =<< ;？php echo $ _POST ['firstname'];？>>< br> 
< label class =w> Last Name：< / label>< input name =lastnametype =textplaceholder =Last Namerequired =requiredvalue =< ;？php echo $ _POST ['lastname'];？>>< br> 
< label class =w>电子邮件ID：< / label>< input name =emailtype =emailplaceholder =输入电子邮件地址required =requiredvalue = <？php echo $ _POST ['email'];？>>< br> 
< label class =w>密码：< / label>< input name =passwordtype =passwordplaceholder =********required =required value =<？php echo $ _POST ['password'];？>>< br> 
< label class =w>重新输入密码：< / label>< input name =confirmpasswordtype =passwordplaceholder =********required =requiredvalue =<？php echo $ _POST ['confirmpassword'];？>>< br> 
< label class =w>街道地址1：< / label>< input name =strtadd1type =textplaceholder =street address firstrequired =requiredvalue = <？php echo $ _POST ['strtadd1'];？>>< br> 
< label class =w>街道地址2：< / label>< input name =strtadd2type =textplaceholder =street address secondvalue =<？php echo $ _POST ['strtadd2'];？>>< br> 
< label class =w>城市：< / label>< input name =citytype =textplaceholder =Cityrequired =requiredvalue =< ;? php echo $ _POST ['firstname'];？>>< br> 
< label class =w>国家：< / label>< select autofocus =id =a1_txtBox1name =countryrequired =requiredplaceholder =select onevalue =<？php echo $ _POST ['country'];？>> 
  

任何帮助都会被appriciated

解决方案

 <$ c解决方案
 
它们保留在字段中，因为您明确告诉PHP使用提交的数据填充表单。 $ c>< input name =firstnametype =textplaceholder =First Namerequired =required
 value =<？php echo $ _POST ['firstname'];？> > 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ HERE 
  

只要删除它即可，或者如果您希望条件不这样做，如果语句 echo 或者只是清理 $ _ POST 字段。

  $ _ POST = array（）; //假装什么都没有发布
  

或者，如果成功，将用户重定向到另一个页面：

  header（Location：success.html）; 
出口; //位置标题被设置，没有意义发送HTML，停止脚本
  

顺便说一下首选方法。如果您将用户保留在通过 POST 方法到达的页面中，如果他刷新页面，表单将再次提交。

I am making a simple Form the problem i am facing is when i submit the form values still remains in the field. and I want to clear it after SUCCESSFUL submission. Please help.

here is my code for the form..

<label class="w">Plan :</label>
<select autofocus="" name="plan" required="required">
    <option value="">Select One</option>
    <option value="FREE Account">FREE Account</option>
    <option value="Premium Account Monthly">Premium Account Monthly</option>
    <option value="Premium Account Yearly">Premium Account Yearly</option>
</select>
<br>
<label class="w">First Name :</label><input name="firstname" type="text" placeholder="First Name" required="required" value="<?php echo $_POST['firstname'];?>"><br>
<label class="w">Last Name :</label><input name="lastname" type="text" placeholder="Last Name" required="required" value="<?php echo $_POST['lastname'];?>"><br>
<label class="w">E-mail ID :</label><input name="email" type="email" placeholder="Enter Email" required="required" value="<?php echo $_POST['email'];?>"><br>
<label class="w">Password :</label><input name="password" type="password" placeholder="********" required="required" value="<?php echo $_POST['password'];?>"><br>
<label class="w">Re-Enter Password :</label><input name="confirmpassword" type="password" placeholder="********" required="required" value="<?php echo $_POST['confirmpassword'];?>"><br>
<label class="w">Street Address 1 :</label><input name="strtadd1" type="text" placeholder="street address first" required="required" value="<?php echo $_POST['strtadd1'];?>"><br>
<label class="w">Street Address 2 :</label><input name="strtadd2" type="text" placeholder="street address second"  value="<?php echo $_POST['strtadd2'];?>"><br>
<label class="w">City :</label><input name="city" type="text" placeholder="City" required="required" value="<?php echo $_POST['firstname'];?>"><br>
<label class="w">Country :</label><select autofocus="" id="a1_txtBox1" name="country" required="required" placeholder="select one" value="<?php echo $_POST['country'];?>">

Any help would be appriciated

解决方案

They remain in the fields because you are explicitly telling PHP to fill the form with the submitted data.

<input name="firstname" type="text" placeholder="First Name" required="required"
value="<?php echo $_POST['firstname'];?>">
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ HERE

Just remove this, or if you want a condition to not do so make a if statement to that echo or just cleanup the $_POST fields.

$_POST = array(); // lets pretend nothing was posted

Or, if successful, redirect the user to another page:

header("Location: success.html");
exit; // Location header is set, pointless to send HTML, stop the script

Which by the way is the prefered method. If you keep the user in a page that was reached through a POST method, if he refreshes the page the form will be submitted again.

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