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第十六章 PHP 操作MySQL_PHP教程

WBOY
WBOY원래의
2016-07-13 10:32:01797검색

学习要点:
1.PHP 连接到MySQL
2.增删改查
3.其他常用函数

 

  如果你已经具有了使用PHP、SQL 和MySQL 的丰富经验,现在就可以把所有这些技术
组合在一起。PHP 与MySQL 之间稳固的集成只是众多程序员采纳它的一个原因,还有一个
原因就是,它如此的简单方便。

 

一.PHP连接到MySQL

这里,我们全面采用UTF-8 编码。
设置Zend Stduio 的编码:Window -> Preferences -> Workspace


标头设置,让火狐和IE 保持编码统一:

<?<span php
</span><span header</span>('Content-Type:text/html; charset=utf-8'<span );
</span>?>

 

连接MySQL

<?<span php
</span><span $conn</span> = @<span mysql_connect</span>(DB_HOST,DB_USER,<span DB_PASSWORD) or
</span><span die</span>('数据库连接失败!错误信息:'.<span mysql_error</span><span ());
</span>?>

 

数据库连接参数,可以用常量存储,这样就不能修改,更加安全。

<?<span php
</span><span define</span>('DB_USER','root'<span );
</span><span define</span>('DB_PASSWORD','yangfan'<span );
</span><span define</span>('DB_HOST','localhost'<span );
</span><span define</span>('DB_NAME' ,'school'<span );
</span>?>

 

选择你所需要的数据库

<?<span php
@</span><span mysql_select_db</span>(DB_NAME) or <span die</span>('数据库找不到!错误信息:'.<span mysql_error</span><span ());
</span>?>

 

设置字符集,如果是GBK,直接设置SET NAMES GBK 即可

<?<span php
@</span><span mysql_query</span>('SET NAMES UTF8') or <span die</span>('字符集设置错误'<span );
</span>?>

 

获取记录集

<?<span php
</span><span $query</span> = "SELECT * FROM grade"<span ;
</span><span $result</span> = @<span mysql_query</span>(<span $query</span>) or <span die</span>('<span SQL 语句有误!错误信息:
</span>'.<span mysql_error</span><span ());
</span>?>

 

输出一条记录

<?<span php
</span><span print_r</span>(<span mysql_fetch_array</span>(<span $result</span>,<span MYSQL_ASSOC));
</span>?>

 

释放结果集资源

<?<span php
</span><span mysql_free_result</span>(<span $result</span><span );
</span>?>

 

关闭数据库

<?<span php
</span><span mysql_close</span>(<span $conn</span><span );
</span>?>

 

二.增删改查

新增数据

<?<span php
</span><span $query</span> = "<span INSERT INTO grade (name,email,point,regdate) VALUE
('李炎恢','yc60.com@gmail.com',,NOW())</span>"<span ;
@</span><span mysql_query</span>(<span $query</span>) or <span die</span>('添加数据出错:'.<span mysql_error</span><span ());
</span>?>

修改数据

<?<span php
</span><span $query</span> = "UPDATE grade SET name='小可爱' WHERE id=6"<span ;
@</span><span mysql_query</span>(<span $query</span>) or <span die</span>('修改出错:'.<span mysql_error</span><span ());
</span>?>

删除数据

<?<span php
</span><span $query</span> = "DELETE FROM grade WHERE id=6"<span ;
@</span><span mysql_query</span>(<span $query</span>) or <span die</span>('删除错误:'.<span mysql_error</span><span ());
</span>?>

显示数据

<?<span php
</span><span $query</span> = "SELECT id,name,email,point FROM grade"<span ;
</span><span $result</span> = @<span mysql_query</span>(<span $query</span>) or <span die</span>('查询语句出错:'.<span mysql_error</span><span ());
</span><span while</span> (!!<span $row</span> = <span mysql_fetch_array</span>(<span $result</span><span )) {
    </span><span echo</span> <span $row</span>['id'].'----'.<span $row</span>['name'].'----'.<span $row</span>['email'].'----'.<span $row</span>['point'<span ];
    </span><span echo</span> '<br />'<span ;
}
</span>?>

 

三.其他常用函数

mysql_fetch_row():从结果集中取得一行作为枚举数组
mysql_fetch_assoc(): 从结果集中取得一行作为关联数组
mysql_fetch_array(): 从结果集中取得一行作为关联数组,或数字数组,或二者兼有
mysql_fetch_lengths (): 取得结果集中每个输出的长度
mysql_field_name(): 取得结果中指定字段的字段名
mysql_num_rows(): 取得结果集中行的数目
mysql_num_fields():取得结果集中字段的数目
mysql_get_client_info(): 取得MySQL 客户端信息
mysql_get_host_info(): 取得MySQL 主机信息
mysql_get_proto_info(): 取得MySQL 协议信息
mysql_get_server_info(): 取得MySQL 服务器信息

  注:文章出自李炎恢PHP视频教程,本文仅限交流使用,不得用于商业用途,否则后果自负。

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/759623.htmlTechArticle学习要点: 1.PHP 连接到MySQL 2.增删改查 3.其他常用函数 如果你已经具有了使用PHP、SQL 和MySQL 的丰富经验,现在就可以把所有这些技术 组合...
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