Question

我正在尝试运行图像获取的视图总数。我的测试文件每次都能完美运行。实际文件image_win.php没有，经过多次测试后看不出有什么问题。此文件STRANGENESS：前两个视图计数正常，其中1添加了字段image_visit中的总计。但是每次将2添加到image_visit中的总数之后。非常离奇。

谢谢你看看-Allen

<?
////////TEST IMAGE_WIN //////////THIS WORKS
include_once "scripts/connect_to_mysql.php";
include_once "scripts/paths.php";
$art_id = 372;
$QUERY="SELECT user_id FROM artWork WHERE art_id = '$art_id'";
$res = mysql_query($QUERY);
$num = mysql_num_rows($res);
if($num >0){

while($row = mysql_fetch_array($res)){ 
     $owner_id = $row['user_id'];
    }
}
mysql_query("UPDATE userInfo SET image_visit = image_visit +1  WHERE user_id = '$owner_id'"); 
?>

<?php 
//////// image_win.php  /////////THIS DOES NOT WORK
$user_id=$_SESSION['user_id'];
include_once "scripts/connect_to_mysql.php";
include_once "scripts/paths.php";
$image_link = $_GET['image_link'];
$art_id = $_GET['art_id'];
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, height=device-height, target-densityDpi=device-dpi">
<title>Image Window</title>
</head>
<body bgcolor="#000000" leftmargin="0">
<div  align="center" >
<img src="slir/w640-h535/<?php echo $path.$image_link.$postCat; ?>" />
<?php
$QUERY="SELECT user_id FROM artWork WHERE art_id = '$art_id'";
$res = mysql_query($QUERY);
$num = mysql_num_rows($res);
if($num >0){
while($row = mysql_fetch_array($res)){ 
     $owner_id = $row['user_id'];
    }
}
mysql_query("UPDATE userInfo SET image_visit = (image_visit +1)  WHERE user_id = '$owner_id' ");

?>

Answer 1

您是否检查过您的查询是否成功？裸眼处理应该是：

$res = mysql_query($QUERY) or die(mysql_error());

和

mysql_query("UPDATE userInfo SET image_visit = image_visit +1  WHERE user_id = '$owner_id'") or die(mysql_error());

同样，假设art_id是artWork表的主键，那么查询最多只返回1行，因此不需要执行while()循环以获取查询结果。只需$row = mysql_fetch_array()，无需循环。

同样，您的代码完全容易受到SQL注入攻击，所以我会指出http://bobby-tables.com来阅读更多相关内容。

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1 个答案: