How to get the parameters submitted by get in php

In PHP, if you want to obtain the data submitted through the get method, you can obtain it through the $_GET object (although the parameters can be viewed in the address bar)

HTML code: The following is a simple form code to submit data to 01.php, using the get method (recommended learning: PHP video tutorial)

<form action="01.php" method="get" >
  <label for="">姓名:
      <input type="text" name= "userName"></label>
      <br/>
  <label for="">邮箱:
      <input type="text" name= "userEmail"></label>
      <br/>
      <input type="submit" name="">
</form>

PHP code:

<?php 
    echo "<h1>GET_PAGE</h1>";
    echo &#39;userName:&#39;.$_GET[&#39;userName&#39;];
    echo &#39;<br/>&#39;;
    echo &#39;userEmail:&#39;.$_GET[&#39;userEmail&#39;];
 ?>

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