Common code for PHP connections and reading and writing to MySQL databases

Here I summarize the common PHP connection MySQL database and read Write database method, I hope to help you, of course, as a review of my own summary.

1. To better set up a data connection, the values involved in the data connection are typically defined as variables.

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$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

You can also put the above variables in a file, you can make other file calls at any time.

For example, put the above in the following: Db_config.php is called directly on other pages that need to use the database.

Calling code: Require ("db_config.php");

2. Connect to the database

$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. Read the contents of the table, here we use the while, you can use for or other depending on the situation.

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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 write database, MySQL data write

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$conn=mysql_connect($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

Common code for PHP connections and reading and writing to MySQL databases