hi
敲代码~
1、php与mysql
5.4 修改界面
同样是界面和程序。
界面article.modify.php
<?php require_once('../connect.php'); //读取旧信息 $id = $_GET['id']; $query = mysqli_query($con,"select * from article where id=$id"); $data = mysqli_fetch_assoc($query); ?> <!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" /> <title>无标题文档</title> <style type="text/css"> body { margin-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; } </style> </head>
<body> <table width="100%" height="520" border="0" cellpadding="8" cellspacing="1" bgcolor="#000000"> <tr> <td height="89" colspan="2" bgcolor="#FFFF99"><strong>后台管理系统</strong></td> </tr> <tr> <td width="213" height="287" align="left" valign="top" bgcolor="#FFFF99"><p><a href="article.add.php">发布文章</a></p> <p><a href="article.manage.php">管理文章</a></p> <a href="article.add.php"></a></td> <td width="854" valign="top" bgcolor="#FFFFFF"><form ><strong>版权所有</strong></td> </tr> </table> </body> </html>
关键点在于php的读取,以及在html中value的php调用。
修改程序article.modify.handle.php
<?php //和数据库有关的,无条件写上这么一句话 require_once('../connect.php');
//接受修改后的数据(表单传递) $id = $_POST['id']; $title = $_POST['title']; $author = $_POST['author']; $description = $_POST['description']; $content = $_POST['content']; $dateline = time();
//写sql修改语句,并做成功与否的判断,并跳回修改界面 $updatesql = "update article set title='$title',author='$author',description='$description',content='$content',dateline=$dateline where id=$id"; if(mysqli_query($con,$updatesql)){ echo "<script>alert('修改文章成功');window.location.href='article.manage.php';</script>"; }else{ echo "<script>alert('修改文章失败');window.location.href='article.manage.php';</script>"; } ?>
5.5 文章删除
先做需求的分析:同上面几个略有区别,删除文章不需要界面,只需要一个删除按钮来掉要就行了。所以只有一个文件。而关键的sql语句只有一句
$delsql="delete from article where id=$id";
aritcle.del.handle.php
<?php require_once('../connect.php');
//读取id号。不像其他的是有传递值的 $id = $_GET['id']; $deletesql = "delete from article where id=$id"; if(mysql_query($deletesql)){ echo "<script>alert('删除文章成功');window.location.href='article.manage.php';</script>"; }else{ echo "<script>alert('删除文章失败');window.location.href='article.manage.php';</script>"; } ?>
5.6 文章管理列表
需求分析:列表显示出所有的文章,然后后面有两个按钮,删除(链接至上一节的删除模块)和修改(链接至之前的模块)
所以,只需要一个文件,显示模块就好
article.manage.php
<?php require_once('../connect.php'); $sql = "select * from article order by dateline desc"; $query = mysqli_query($con,$sql); if($query&&mysqli_num_rows($query)){ while($row =mysqli_fetch_assoc($query)){ $data[] = $row; } }else{ $data = array(); }
?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> <style type="text/css"> body { margin-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; } </style> </head>
<body> <table width="100%" height="520" border="0" cellpadding="8" cellspacing="1" bgcolor="#000000"> <tr> <td height="89" colspan="2" bgcolor="#FFFF99"><strong>后台管理系统</strong></td> </tr> <tr> <td width="156" height="287" align="left" valign="top" bgcolor="#FFFF99"><p><a href="article.add.php">发布文章</a></p> <p><a href="article.manage.php">管理文章</a></p></td> <td width="837" valign="top" bgcolor="#FFFFFF"><table width="743" border="0" cellpadding="8" cellspacing="1" bgcolor="#000000"> <tr> <td colspan="3" align="center" bgcolor="#FFFFFF">文章管理列表</td> </tr> <tr> <td width="37" bgcolor="#FFFFFF">编号</td> <td width="572" bgcolor="#FFFFFF">标题</td> <td width="82" bgcolor="#FFFFFF">操作</td> </tr> <?php if(!empty($data)){ foreach($data as $value){ ?> <tr> <td bgcolor="#FFFFFF"> <?php echo $value['id']?></td> <td bgcolor="#FFFFFF"> <?php echo $value['title']?></td> <td bgcolor="#FFFFFF"><a href="article.del.handle.php?id=<?php echo $value['id']?>">删除</a> <a href="article.modify.php?id=<?php echo $value['id']?>">修改</a></td> </tr> </table></td> </tr> <tr> <td colspan="2" bgcolor="#FFFF99"><strong>版权所有</strong></td> </tr> </table> </body> </html>
5.7 函数总结
mysqli_connect()
mysqli_select_db()
mysqli_query()
mysqli_error()
mysqli_fetch_assoc()
mysqli_num_rows()
六、前台管理界面的开发
6.1 文章列表
article.list.php
<?php require_once('connect.php'); $sql = "select * from article order by dateline desc"; $query = mysqli_query($con,$sql); if($query&&mysqli_num_rows($query)){ while($row = mysqli_fetch_assoc($query)){ $data[] = $row; } } ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <title>文章发布系统</title> <meta name="keywords" content="" /> <meta name="description" content="" /> <link href="default.css" rel="stylesheet" type="text/css" /> </head> <body> <div >联系我们</a></li> </ul> </div> </div> <!-- end header --> </div>
<!-- start page --> <div ></p> </div> <!-- end footer --> </body> </html>
6.2 文章详情页
article.show.php
<?php require_once('connect.php'); $id = intval($_GET['id']); $sql = "select * from article where id=$id"; $query = mysqli_query($con,$sql); if($query&&mysqli_num_rows($query)){ $row = mysqli_fetch_assoc($query); }else{ echo "这篇文章不存在"; exit; } ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <title>文章发布系统</title> <meta name="keywords" content="" /> <meta name="description" content="" /> <link href="default.css" rel="stylesheet" type="text/css" /> </head> <body> <div >联系我们</a></li> </ul> </div> </div> <!-- end header --> </div>
<!-- start page --> <div ></p> </div> <!-- end footer --> </body> </html>
6.3 检索
article.search.php
这里的查询的是根据题目来查询。
<?php require_once('connect.php'); $key = $_GET['key']; $sql = "select * from article where title like '%$key%' order by dateline desc"; $query = mysqli_query($con,$sql); if($query&&mysqli_num_rows($query)){ while($row = mysqli_fetch_assoc($query)){ $data[] = $row; } } ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <title>文章发布系统</title> <meta name="keywords" content="" /> <meta name="description" content="" /> <link href="default.css" rel="stylesheet" type="text/css" /> </head> <body> <div >联系我们</a></li> </ul> </div> </div> <!-- end header --> </div>
<!-- start page --> <div ></p> </div> <!-- end footer --> </body> </html>
6.4 关于我们和联系我们
about.php
<?php require_once('connect.php'); $sql = "select * from introduce"; $query = mysqli_query($con,$sql); //if($query&&mysqli_num_rows($query)){ $about = "啦啦啦"; //} ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <title>文章发布系统</title> <meta name="keywords" content="" /> <meta name="description" content="" /> <link href="default.css" rel="stylesheet" type="text/css" /> </head> <body> <div >联系我们</a></li> </ul> </div> </div> <!-- end header --> </div>
<!-- start page --> <div ></p> </div> <!-- end footer --> </body> </html>
contact.php
<?php require_once('connect.php'); $sql = "select * from introduce"; $query = mysqli_query($con,$sql); //$arr=mysqli_fetch_array($query, MYSQL_ASSOC); //if($query&&mysqli_num_rows($query)){ $contact = "asdfadf"; //} ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <title>文章发布系统</title> <meta name="keywords" content="" /> <meta name="description" content="" /> <link href="default.css" rel="stylesheet" type="text/css" /> </head> <body> <div >联系我们</a></li> </ul> </div> </div> <!-- end header --> </div>
<!-- start page --> <div >
</div> <!-- end footer --> </body> </html>
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2、JSON基础
1.2 JSON的使用
--JSON与serialize数据格式的异同和使用
相同点:把其他数据类型转换为一个可以传输的字符串;都是结构性数据;
不同点:s序列化之后,保存数据原有类型——适用于存储带有加密方式的数据串;JSON更简洁——适合数据量大,不要求数据类型保存的情况
举个栗子
<?php //输出模块 function createHtmlTag($tag=""){ echo "<h1>$tag</h1><br/>"; } createHtmlTag("Hello!"); createHtmlTag("JSON和serialize的对比");
//测试用数组 $member=array("username","age"); var_dump($member);
$jsonObj=json_encode($member);
$serializeObj=serialize($member);
createHtmlTag($jsonObj); createHtmlTag($serializeObj);
结果
JSON和serialize的对比
array (size=2)
0 =>
string
'username' (length=8)
1 =>
string
'age' (length=3)
["username","age"]
a:2:{i:0;s:8:"username";i:1;s:3:"age";}
--常用JSON函数
json_encode()——JSON加密
json_decode()——解密
1.3 JSON实例讲解
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