如何将PHP代码添加到URL

我应该使用什么php代码，以及如何将其添加到下面的下一篇文章url链接中，这将导致多维数组中的下一篇文章随后被回显

我打算依次复述一篇又一篇文章

谢谢大家!

（form.php）

组：
第一组
第2组
第章：
第条：

（process.php）

---

将链接到本章的下一篇文章。但是，您必须检查您是否在给定章节的最后一篇文章中，我将留给您

我已将您的代码更正为echo$article++not echo（$article+1），并且它已起作用。但我后来还添加了上一篇文章的url链接，除了$ARTICLE之外，其他代码都是相同的，但无法工作。我应该怎么做才能使这两个链接都有效？

<form action="process.php" method="get">
    Group:
    <select name="group">
        <option value="group1">Group1</option>
        <option value="group2">Group2</option>
    </select>

    Chapter:
    <input type="text" name="chapter">

    Article:
    <input type="text" name="article">

    <input type="submit" value="Go to Article">    

</form>

<?php

session_start();

$laws=array(
       "group1"=>array(
                      "1"=>array(
                                "1"=>"This is article (1) in chapter (1) of (group1)",
                                "2"=>"This is article (2) in chapter (1) of (group1)",
                                "3"=>"This is article (3) in chapter (1) of (group1)",
                                ),
                      "2"=>array(
                                "1"=>"This is article (1) in chapter (2) of (group1)",
                                "2"=>"This is article (2) in chapter (2) of (group1)",
                                "3"=>"This is article (3) in chapter (2) of (group1)",
                                ),
                       ),
       "group2"=>array(
                      "1"=>array(
                                "1"=>"This is article (1) in chapter (1) of (group2)",
                                "2"=>"This is article (2) in chapter (1) of (group2)",
                                "3"=>"This is article (3) in chapter (1) of (group2)",
                                ),
                      "2"=>array(
                                "1"=>"This is article (1) in chapter (2) of (group2)",
                                "2"=>"This is article (2) in chapter (2) of (group2)",
                                "3"=>"This is article (3) in chapter (2) of (group2)",
                                ),

       )
       );

$grp= $_GET['group'];
$chap = $_GET['chapter'];
$art = $_GET['article'];

if(isset($laws[$grp]) && isset($laws[$grp][$chap]) && isset($laws[$grp][$chap][$art])){
$_SESSION['group'] = $grp;
$_SESSION['chapter'] = $chap;
$_SESSION['article'] = $art;    
}else{
$_SESSION['group'] = 'group1';
$_SESSION['chapter'] = '1';
$_SESSION['article'] = '1';   
}

$group = $_SESSION['group'];
$chapter = $_SESSION['chapter'];
$article = $_SESSION['article'];


echo $laws[$group][$chapter][$article]; // ALL NEXT ARTICLES TO BE ECHOED HERE!!!!!

?>

<a href="process.php" style="text-decoration: none;">NEXT ARTICLE</a>

<a href="process.php?group=<?php echo $group; ?>&chapter=<?php echo $chapter; ?>&article=<?php echo ($article + 1); ?>" style="text-decoration: none;">NEXT ARTICLE</a>