您的位置：首页 > 产品设计 > UI/UE

使用mysql_query()方法操纵数据库以及综合实例

2015-11-07 18:16 741 查看
1.利用insert 语句添加记录

<? require('conn.php');
mysql_query( "insert into lyb ( title, content, author, email,`date`) values ('大家好', 'PHP学习园地', '小浣熊', 'sdf@sd.com','2012-3-3')") or die('执行失败');
echo '新增记录的id是'.mysql_insert_id();        //可选，输出新记录的id
?>


２.利用delete语句删除数据

<?    require('conn.php');
mysql_query( " Delete from lyb where ID in(158,162,163,169)") or die('执行失败');
?>
本次操作共有<?= mysql_affected_rows() ?>条记录被删除！


３.利用updata语句更新数据

<?    require('conn.php');
mysql_query("Update lyb set email='rong@163.com', author='蓉蓉' where ID>133 and ID<143") or die('执行失败');
?>


接下来演示一个完整的例子

5.1.php为插入页面

<?php
/*
*
* @Authors peng--jun
* @Email   1098325951@qq.com
* @Date    2015-11-07 13:50:48
* @Link    http://www.cnblogs.com/xs-yqz/ * @version $Id$
==========================================
*/
header("Content-type: text/html; charset=UTF-8");

if (isset($_POST['submit'])) {
require("include/conn.php");
mysql_select_db("lyb",$conn);//选择数据库

$title = $_POST['title'];
$author = $_POST['author'];
$content = $_POST['content'];
$email = $_POST['email'];
$result = mysql_query("insert into `lyb1`(`id`,`title`,`content`,`author`,`email`) values(null,'$title','$content','$author','$email')")or die('执行失败');;
var_dump($result);
echo "新增的记录的id为".mysql_insert_id();
mysql_free_result($result);
mysql_close($result);
echo "<script>alert('插入完成');</script>";
header("Location:5.6.php");
/* header("refresh:3;url=5.6.php");*/ //3秒后 页面跳转
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>添加数据页面</title>
</head>
<body>
<form action="5.1.php" method="POST">
<p>添加新闻页面</p>
<div>标题:<input type="text" name="title" id=""></div>
<div>内容: <textarea  name="content" id="" cols="30" rows="5"></textarea></div>
<div>作者:<input type="text" name="author" id=""></div>
<div>邮箱:<input type="text" name="email" id=""></div>
<div><input type="reset" value="重置"><input type="submit" name="submit" value="提交"></div>
</form>
</body>
</html>


5.6.php为从数据库后台提取数据 显示在前台的页面

<?php
/*
*
* @Authors peng--jun
* @Email   1098325951@qq.com
* @Date    2015-11-07 15:10:04
* @Link    http://www.cnblogs.com/xs-yqz/ * @version $Id$
==========================================
*/
header("Content-type: text/html; charset=UTF-8");
require("include/conn.php");
mysql_select_db("lyb",$conn);//选择数据库
$result = mysql_query("select * from `lyb1`",$conn);//选择数据库表
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<a href="5.1.php">添加记录</a>
<table border="1">
<tr bgcolor="#ccc">
<th>序号</th>
<th>标题</th>
<th>内容</th>
<th>作者</th>
<th>邮箱</th>
<th>删除</th>
<th>更新</th>
</tr>
<?php
while ($row = mysql_fetch_assoc($result)) {
?>
<tr>
<td><?= $row['id']?></td>
<td><?= $row['title']?></td>
<td><?= $row['content']?></td>
<td><?= $row['author']?></td>
<td><?= $row['email']?></td>
<td><a href="delete.php?id=<?= $row['id']?>">删除</a></td>
<td><a href="editform.php?id=<?= $row['id']?>">更新</a></td>
</tr>
<?php
}
?>
</table>
<p>共有<?= mysql_num_rows($result) ?>条记录 </p>
<!-- mysql_num_rows（）函数返回的是结果集的总数 -->

<?php
//释放资源，关闭结果集
mysql_free_result($result);
mysql_close($result);
?>

</body>
</html>


delete.php删除程序

<?php
/*
*
* @Authors peng--jun
* @Email   1098325951@qq.com
* @Date    2015-11-07 15:26:27
* @Link    http://www.cnblogs.com/xs-yqz/ * @version $Id$
==========================================
*/
header("Content-type: text/html; charset=UTF-8");
require("include/conn.php");
mysql_select_db("lyb",$conn);//选择数据库
$id = intval($_GET['id']);//获取5-6.php传来的id参数并转换为整型
$sql = "delete from `lyb1` where `id` = $id ";//删除指定的内容
if (mysql_query($sql) && mysql_affected_rows()==1) {//执行sql语句并判断执行是否成功
echo "<script>alert('删除成功！');location.href='5.6.php'</script>";
}else{
echo "<script>alert('删除失败！');location.href='5.6.php'</script>";
}
?>




多选删除页面deleteall.php

<?php
/*
*
* @Authors peng--jun
* @Email   1098325951@qq.com
* @Date    2015-11-07 15:10:04
* @Link    http://www.cnblogs.com/xs-yqz/ * @version $Id$
==========================================
*/
header("Content-type: text/html; charset=UTF-8");
require("include/conn.php");
mysql_select_db("lyb",$conn);//选择数据库

if ($_GET["del"]==1) {//如果用户按了“删除”按钮
$selectid=$_POST["selected"];//获取所有选中多选框的值，保存到数组中
if( count($selectid)>0){//防止selectid值为空时执行SQL语句出错
$sel = implode(",", $selectid);//将各个数组元素用“,”号连接起来
mysql_query("delete from `lyb1` where `id` in($sel)")or die("执行失败".mysql_error());
header("Location:deleteall.php");//删除完毕，刷新页面
}else{
echo "没有被选中的数据";
}
}

$result = mysql_query("select * from `lyb1`",$conn);//选择数据库表
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<form method="post" action="?del=1"> <!--表单提交给自身-->
<a href="5.1.php">添加记录</a>
<table border="1">
<tr bgcolor="#ccc">
<th>序号</th>
<th>标题</th>
<th>内容</th>
<th>作者</th>
<th>邮箱</th>
<th>删除</th>
<th>更新</th>
</tr>
<?php
while ($row = mysql_fetch_assoc($result)) {
?>
<tr>
<td><?= $row['id']?></td>
<td><?= $row['title']?></td>
<td><?= $row['content']?></td>
<td><?= $row['author']?></td>
<td><?= $row['email']?></td>
<td><input type="checkbox" name="selected[]" id="" value="<?= $row['id']?>"></td><!-- 删除的复选框 -->
<td><a href="editform.php?id=<?= $row['id']?>">更新</a></td>
</tr>
<?php
}
?>
<tr bgcolor="#ddd">
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td><input type="submit" value="删 除"></td><!-- 删除按钮 -->
<td></td>
</tr>
</table>
<p>共有<?= mysql_num_rows($result) ?>条记录 </p>
</form>
<!-- mysql_num_rows（）函数返回的是结果集的总数 -->
<?php
//释放资源，关闭结果集
mysql_free_result($result);
mysql_close($result);
?>

</body>
</html>




更新页面的代码 editform.php

<?php
/*
*
* @Authors peng--jun
* @Email   1098325951@qq.com
* @Date    2015-11-07 16:39:42
* @Link    http://www.cnblogs.com/xs-yqz/ * @version $Id$
==========================================
*/
header("Content-type: text/html; charset=UTF-8");
require("include/conn.php");
mysql_select_db("lyb",$conn);//选择数据库

$id = intval($_GET['id']);//将获取的id强制转换为整型
$sql = "select * from `lyb1` where id = $id";
echo $sql;
$result = mysql_query($sql,$conn);//选择数据库表
$row = mysql_fetch_assoc($result);//将待更新记录各字段的值存入数组中

if ($_POST["submit"]) {//当单击确认按钮后执行更新语句
$title = $_POST['title'];
$author = $_POST['author'];
$content = $_POST['content'];
$email = $_POST['email'];
$sql_del = "Update `lyb1` Set title='$title',author='$author',email='$email',content='$content' Where id='$id'";
echo $sql_del;
mysql_query($sql_del)or die("执行失败".mysql_error());
echo "<script>alert('留言修改成功');location.href='5.6.php'</script>";
}

?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>添加数据页面</title>
</head>
<body>
<form action="?id=<?= $row['id']?>" method="POST">
<p>添加新闻页面</p>
<div>标题:<input type="text" name="title" id="" value="<?= $row['title']?>"></div>
<div>内容:    <textarea  name="content" id="" cols="30" rows="5"><?= $row['content']?></textarea></div>
<div>作者:<input type="text" name="author" id="" value="<?= $row['author']?>"></div>
<div>邮箱:<input type="text" name="email" id="" value="<?= $row['email']?>"></div>
<div><input type="reset" value="重置"><input type="submit" name="submit" value="确定"></div>
</form>
</body>
</html>


查询记录的实现search.php

<?php
/*
*
* @Authors peng--jun
* @Email   1098325951@qq.com
* @Date    2015-11-07 17:31:16
* @Link    http://www.cnblogs.com/xs-yqz/ * @version $Id$
==========================================
*/
header("Content-type: text/html; charset=UTF-8");
require("include/conn.php");
mysql_select_db("lyb",$conn);//选择数据库
$result = mysql_query("select * from `lyb1`",$conn);
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>查询页面</title>
</head>
<body>
<form action="search_result.php" method="get">
<div style="border:1px solid gray; background:#eee;padding:4px;">
查找留言：请输入关键字 <input name="keyword" type="text">
<select name="sel">
<option value="title">文章标题</option>
<option value="content">文章内容</option>
</select>
<input type="submit" name="submit" value="查询">
</div>
</form>

<table border="1">
<tr bgcolor="#ccc">
<th>序号</th>
<th>标题</th>
<th>内容</th>
<th>作者</th>
<th>邮箱</th>
<th>删除</th>
<th>更新</th>
</tr>
<?php
while ($row = mysql_fetch_assoc($result)) {
?>
<tr>
<td><?= $row['id']?></td>
<td><?= $row['title']?></td>
<td><?= $row['content']?></td>
<td><?= $row['author']?></td>
<td><?= $row['email']?></td>
<td><a href="delete.php?id=<?= $row['id']?>">删除</a></td>
<td><a href="editform.php?id=<?= $row['id']?>">更新</a></td>
</tr>
<?php
}
?>
</table>
<p>共有<?= mysql_num_rows($result) ?>条记录</p>
</body>
</html>




查询结果的显示页面search_result.php

<?php
/*
*
* @Authors peng--jun
* @Email   1098325951@qq.com
* @Date    2015-11-07 17:40:21
* @Link    http://www.cnblogs.com/xs-yqz/ * @version $Id$
==========================================
*/
header("Content-type: text/html; charset=UTF-8");
require("include/conn.php");
mysql_select_db("lyb",$conn);//选择数据库
$keyword=trim($_GET['keyword']);//获取输入的关键字
$sel=$_GET['sel'];//获取选择的查询类型
$sql="select * from `lyb1`";
if ($keyword<>"") {
$sql=$sql ." where $sel like '%$keyword%'";    //构造查询语句
}
$result=mysql_query($sql) or die('执行失败');
if (mysql_num_rows($result)>0) {
echo "<p>关键字为“ $keyword ”，共找到".mysql_num_rows($result)." 条留言</p>";

?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>查询结果</title>
</head>
<body>

<table border="1">
<tr bgcolor="#ccc">
<th>序号</th>
<th>标题</th>
<th>内容</th>
<th>作者</th>
<th>邮箱</th>
<th>删除</th>
<th>更新</th>
</tr>
<?php
while ($row = mysql_fetch_assoc($result)) {
?>
<tr>
<td><?= $row['id']?></td>
<td><?= $row['title']?></td>
<td><?= $row['content']?></td>
<td><?= $row['author']?></td>
<td><?= $row['email']?></td>
<td><a href="delete.php?id=<?= $row['id']?>">删除</a></td>
<td><a href="editform.php?id=<?= $row['id']?>">更新</a></td>
</tr>
<?php
}
}else echo "没有搜索到任何留言";
?>
</table>
</body>
</html>




至此，整个所有的操作都完成了。over！！！
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 点击这里给我发消息
标签： 
相关文章推荐
新的分享
章节导航