PHP：无法从动态创建的 URL 中提取 ID

Question

我网站上的登录页面使用 for 循环显示与该部分（食谱）相关的所有链接。这工作正常。但是我随后需要提取在该 for 循环中生成的 id，以填充正在生成的页面。

我不知道如何提取该 id 值（$_REQUEST['id'] 和 $_REQUEST['id=?'] 都不是；我怀疑两者肯定是错误的）。是通过操作 URL 字符串还是有其他方法？以下是相关代码：

<?php 
                $id = intval($_REQUEST['id']);

                if ($id) {// user gets here by clicking on link with id
                $query  = "SELECT * FROM recipes WHERE uniqno = $id";
                $result = $conn->query($query);
                $row = mysqli_fetch_all($result, MYSQLI_ASSOC);
                $data = $row // fetch data from database

                ?>
                <p><?php echo $data['ingredcontent']; ?></p>

                <?php }
                else {
                foreach ($reciperow as $recipe) { ?>

                <a href="?id=<?php echo $recipe['uniqno'];?>"><h2><?php echo $recipe['rectitle'];?></h2></a>

                <p class="subhead"><?php echo $recipe['recsummary']; ?></p>

<?php }} ?>

如果有人能建议我应该将什么传递给 $_REQUEST 以确保它提取在 foreach 循环中定义的“id”，我将不胜感激。 （注意：我有意远离 PHP 路由，因为这是一个非常基础的项目）。

Answer 1

我尝试修改你的代码如下，请检查这是不是你想要的

<?php 
$conn=new mysqli($hostname, $dbuser, $dbpassword, $dbname);//i assume you have this somewhere

                if (isset($_REQUEST['id'])) {// user gets here by clicking on link with id
                $query  = "SELECT * FROM recipes WHERE uniqno = ".$_REQUEST['id']; //not necessary to convert $_REQUEST to integer
                $result = $conn->query($query);
                $row = mysqli_fetch_all($result, MYSQLI_ASSOC);
                $data = $row // fetch data from database

                ?>
                <p><?php echo $data[0]['ingredcontent']; //you fetch all... need to set index(row) ?></p>

                <?php }
                else {
				//so i assume your $reciperow is fetching all data:
				$query  = "SELECT * FROM recipes"; //not necessary to convert $_REQUEST to integer
                $result = $conn->query($query);
                $reciperow= mysqli_fetch_all($result, MYSQLI_ASSOC);	
				
                foreach ($reciperow as $recipe) { ?>

                <a href="?id=<?php echo $recipe['uniqno'];?>"><h2><?php echo $recipe['rectitle'];?></h2></a>

                <p class="subhead"><?php echo $recipe['recsummary']; ?></p>

<?php }} ?>