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Homephp教程php手册Php连接及读取和写入mysql数据库的常用代码,php写入mysql数据库

Php连接及读取和写入mysql数据库的常用代码,php写入mysql数据库

既然现在你看到了这篇文章,说明你肯定知道PHP和MySQL是怎么一回事,我就不啰嗦了。但为什么你还要继续阅读此文呢?可能是以前你习惯复制粘贴一些代码,并没有真正弄懂代码的含义;也可能你以前弄懂了,但像我一样,有一段时间没有接触,生疏了;再或者,有人问你类似的简单问题,而你已经不屑于回答,直接上网搜索,恰好找到了这篇,于是就推荐给那谁谁谁了...

不管怎样,在这里我总结了常用的PHP连接MySQL数据库以及读取写入数据库的方法,希望能够帮到你,当然也是作为我自己的一个回顾总结。

1.为了更好地设置数据连接,一般会将数据连接所涉及的值定义成变量.

$mysql_server_name='localhost'; //改成自己的mysql数据库服务器

$mysql_username='root'; //改成自己的mysql数据库用户名

$mysql_password='123456'; //改成自己的mysql数据库密码

$mysql_database='Mydb'; //改成自己的mysql数据库名

也可把以上变量放在一个文件里,可以随时让其他文件调用.

例如: 将以上内容放在:db_config.php 那么在其他需要用到数据库的页面直接调用.

调用代码:require("db_config.php");

  2.连接数据库

$conn=mysql_connect($mysql_server_name,$mysql_username,$mysql_password) or die("error connecting") ; //连接数据库

mysql_query("set names 'utf8'"); //数据库输出编码 应该与你的数据库编码保持一致.南昌网站建设公司百恒网络PHP工程师建议用UTF-8 国际标准编码.

mysql_select_db($mysql_database); //打开数据库

$sql ="select * from news "; //SQL语句

$result = mysql_query($sql,$conn); //查询

   3.读取表中的内容,这里我们用while,可以根据具体情况,用for 或其他的.

while($row = mysql_fetch_array($result))

{

echo "<div style=\"height:24px; line-height:24px; font-weight:bold;\">"; //排版代码

echo $row['Topic'] . "<br/>";

echo "</div>"; //排版代码

}

   4.php写入数据库,Mysql数据的写入

$conn=mysql_connect($mysql_server_name,$mysql_username,$mysql_password); //连接数据库

mysql_query("set names 'utf8'"); //数据库输出编码

mysql_select_db($mysql_database); //打开数据库

$sql = "insert into messageboard (Topic,Content,Enabled,Date) values ('$Topic','$Content','1','2011-01-12')";

mysql_query($sql);

mysql_close(); //关闭MySQL连接

php连接mysql,怎用php代码将数据写入数据库?》??

连接:mysql_connect("主机","用户","密码");
mysql_select_db("数据库名");

写入数据:mysql_query("insert into 表名 (字段1,字段2) values ("数据1","数据2")");

你的问题太含糊,只能给你这个答复,不明白再追问。
 

php读取txt文本在写入mysql数据库

/*
以data.txt 为例
建义在数据存储到文本文档的时候
fputs("data.txt","$str1\t$str2\r\n");
以这样的形式!
*/
$str = file_get_contents("data.txt") or die("文件打开失败");
$r = explode("\r\n",$str);
/*
....连接数据库
*/
$sql = "insert into `表`('id','num') values ('".$r[0]."','".$r[1]."')";
mysql_query($sql);

//以上代码未进行测试,如有问题可问我
?>
 

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