為什么我這里顯示 Query was empty
<?php
require_once('../connect.php');
$query=mysql_query("select * from article where id=1");
$data=mysql_fetch_assoc($query);
echo mysql_error();
?>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>修改界面</title>
<style type="text/css">
body{margin: 0;padding: 0;}
html,body{width: 100%;height: 100%;}
.nav{background: yellow;border-bottom: 1px solid #000000;width: 100%;height: 10%;}
.left_nav{background: yellow;border-right: 1px solid #000000;text-align: center;font-size: 24px;padding-top: 1px;width: 10%;height: 90%;float: left;}
.left_nav div{margin-top: 80px;}
.show{float: left;width: 80%;}
.show_c{margin-left: 40px;font-size: 18px;}
.title,.author,.description,.content{clear: both;margin-bottom: 40px;}
.title,.author{height: 20px;}
.description{height: 200px;}
.content{height: 280px;}
.show_title{text-align: center;font-size:36px;padding: 40px;}
.show_left{float: left;margin-right: 100px;}
.show_right{float: left;}
.text{width: 200px;height: 20px;}
.textarea1{width: 880px;height: 200px;}
.textarea2{width: 880px;height: 280px;}
.button{margin: 0 auto;width: 200px;}
</style>
</head>
<body>
<div class="nav"></div>
<div class="left_nav">
<a href="#"><div>文章發布</div></a>
<a href="#"><div>文章管理</div></a>
</div>
<div class="show">
<div class="show_title">修改文章</div>
<form id="form1" name="form1" method="post" action="article.modify.handle.php" class="show_c">
<input type="hidden" name="id" value="<?php echo $data['id'] ?>" />
<div class="title">
<div class="show_left">標題</div>
<input type="text" name="title" id="title" value="<?php echo $data['title']?>" class="show_right text">
</div>
<div class="author">
<div class="show_left">作者</div>
<input type="text" name="author" id="author" value="<?php echo $data['author']?>" class="show_right text">
</div>
<div class="description">
<div class="show_left">簡介</div>
<textarea name="description" id="description" class="show_right textarea1"><?php echo $data['description']?></textarea>
</div>
<div class="content">
<div class="show_left">內容</div>
<textarea name="content" id="content" class="show_right textarea2"><?php echo $data['content']?></textarea>
</div>
<div class="button">
<input type="submit" name="button" id="button" value="提交">
</div>
</form>
</div>
</body>
</html>
2016-08-23
這個錯誤表示 ? 無效的 SQL 語句，SQL 語句為空
2016-08-23
<?php
require_once('../connect.php');
$query=mysql_query("select * from article where id=1");
$data=mysql_fetch_assoc($query);
echo mysql_error();
?>
檢查下代碼是否保存成功 ?是否有article這個數據庫 是否有id=1的數據