Php 如何正确使用mysql中的项目ID作为特定项目的链接？

我需要使用表单编辑数据库中的值，但是我成功地使用了它

<form method='post' action='update_inv.php?id=".$row['prod_id']."'><button type='submit'>Edit</button> 

以下是update_inv.php的完整代码

    <?php
session_start();
  $conn = @mysql_connect("localhost","root","12148qx3er");
  $db = @mysql_select_db("buybranded");
$itemid = $_GET['id'];
$qry = "SELECT * FROM inventory where prod_id = ".$itemid;
mysql_set_charset("UTF8");
$result = @mysql_query($qry);
if($result === FALSE) {
    die(mysql_error()); // TODO: better error handling
}


echo "<div id='page-wrap'>
  <h1>Edit a Product</h1>";
while ($row=mysql_fetch_array($result)){

$prodbrand = $row['prod_brand'];
$prodname = $row['prod_name'];
$prodcategory = $row['prod_category'];
$prodprice = $row['prod_price'];
$proddesc = $row['prod_desc'];
$prodpic = $row['prod_pic'];
$prodquantity = $row['prod_quantity'];

echo "<form enctype='multipart/form-data' method='post'>";

echo "<label for='prod_brand'>Product Brand:</label><br />
      <input name='prod_brand' id='prod_brand' type='text' maxlength='150' class='col1' placeholder='Auto Complete Form' value='$prodbrand'/>
      <div class='clear'></div>";

echo "<label for='prod_name'>Product name:</label><br />
      <input name='prod_name' id='prod_name' type='text' maxlength='150' class='col1' value='$prodname'/>
      <div class='clear'></div>";

echo "<label for='prod_category'>Category:</label><br />
      <select name='prod_category' class='col1'>".$row['prod_category']."
      <option>Select Category</option>
      <option>Compression</option>
      <option>Headwear</option>
      <option>Shorts</option>
      <option>Yoga</optino>
      <option>Swimming</option>
      <option>Fitness Training</option>
      <option>Water Bottles</option>
      <option>Sports Socks</option>
      <option>Sports Bags</option>
      <option>Protein Shaker</option>
      <option>Gloves</option>
      <option>Splash Guards</option>
      <option>Massagers</option>
      <option>Sun Blocks</option>
      <option>Sports Cleaners</option>
      </select>
      <div class='clear'></div><br>";

  echo "<label for='prod_price'>Price:</label><br />
      <input name='prod_price' id='prod_price' type='text' maxlength='10' class='col1' value='$prodprice'/>
      <div class='clear'></div>";

  echo "<label for='prod_desc'>Description: (HTML Codes are allowed)</label><br />
      <textarea name='prod_desc' id='prod_desc' class='col2'>".$row['prod_desc']."</textarea>
      <div class='clear'></div>";

  echo "<label for='prod_pic'>Upload Image:</label><br />
      <input type='file' name='prod_pic' class='col2' value=''/>
      <div class='clear'></div><br>";

  echo "<label for='prod_quantity'>Quantity: </label><br />
      <input name='prod_quantity' id='prod_quantity' type='text' maxlength='4' class='col2' value='$prodquantity'/>
      <div class='clear'></div>";

  echo "<form method='post' action='updating_inv.php?id=$itemid'><button>Update this Entry!</button>";
  echo '<button><a href="javascript:history.back()">Go back</a></button>'; 
  echo "</form>";






  }
  echo "</div>";
?>

---

您有

method='post'

和

$itemid=$\u GET['id']

您应该使用
$itemid=$\u POST['id']
如果
$row['prod\u id']
的计算结果为“1”，则这是来自数据库的数据。你到底为什么期望它会有所不同？你很容易受到伤害。享受你的服务器pwn3d。我不知道为什么它不会改变。我有很多prod_id，但它只显示prod_id=1。我不知道为什么@DavidYou在你的应用程序中混合了一个MySQL函数（我做了一个注释），而其余的是
mysqli.*
。现在您又开始使用
mysql.*
函数了。专业提示：当使用MySQL API时，您只能使用一个API，而不能混合使用。我们需要看看
中还有什么内容，他实际上是在使用get参数发布到url，这应该可以正常工作，即使有点奇怪
    <?php
session_start();
  $conn = @mysql_connect("localhost","root","12148qx3er");
  $db = @mysql_select_db("buybranded");
$itemid = $_GET['id'];
$qry = "SELECT * FROM inventory where prod_id = ".$itemid;
mysql_set_charset("UTF8");
$result = @mysql_query($qry);
if($result === FALSE) {
    die(mysql_error()); // TODO: better error handling
}


echo "<div id='page-wrap'>
  <h1>Edit a Product</h1>";
while ($row=mysql_fetch_array($result)){

$prodbrand = $row['prod_brand'];
$prodname = $row['prod_name'];
$prodcategory = $row['prod_category'];
$prodprice = $row['prod_price'];
$proddesc = $row['prod_desc'];
$prodpic = $row['prod_pic'];
$prodquantity = $row['prod_quantity'];

echo "<form enctype='multipart/form-data' method='post'>";

echo "<label for='prod_brand'>Product Brand:</label><br />
      <input name='prod_brand' id='prod_brand' type='text' maxlength='150' class='col1' placeholder='Auto Complete Form' value='$prodbrand'/>
      <div class='clear'></div>";

echo "<label for='prod_name'>Product name:</label><br />
      <input name='prod_name' id='prod_name' type='text' maxlength='150' class='col1' value='$prodname'/>
      <div class='clear'></div>";

echo "<label for='prod_category'>Category:</label><br />
      <select name='prod_category' class='col1'>".$row['prod_category']."
      <option>Select Category</option>
      <option>Compression</option>
      <option>Headwear</option>
      <option>Shorts</option>
      <option>Yoga</optino>
      <option>Swimming</option>
      <option>Fitness Training</option>
      <option>Water Bottles</option>
      <option>Sports Socks</option>
      <option>Sports Bags</option>
      <option>Protein Shaker</option>
      <option>Gloves</option>
      <option>Splash Guards</option>
      <option>Massagers</option>
      <option>Sun Blocks</option>
      <option>Sports Cleaners</option>
      </select>
      <div class='clear'></div><br>";

  echo "<label for='prod_price'>Price:</label><br />
      <input name='prod_price' id='prod_price' type='text' maxlength='10' class='col1' value='$prodprice'/>
      <div class='clear'></div>";

  echo "<label for='prod_desc'>Description: (HTML Codes are allowed)</label><br />
      <textarea name='prod_desc' id='prod_desc' class='col2'>".$row['prod_desc']."</textarea>
      <div class='clear'></div>";

  echo "<label for='prod_pic'>Upload Image:</label><br />
      <input type='file' name='prod_pic' class='col2' value=''/>
      <div class='clear'></div><br>";

  echo "<label for='prod_quantity'>Quantity: </label><br />
      <input name='prod_quantity' id='prod_quantity' type='text' maxlength='4' class='col2' value='$prodquantity'/>
      <div class='clear'></div>";

  echo "<form method='post' action='updating_inv.php?id=$itemid'><button>Update this Entry!</button>";
  echo '<button><a href="javascript:history.back()">Go back</a></button>'; 
  echo "</form>";






  }
  echo "</div>";
?>