Mysql connection and basic operation code in php

Occasionally, you need to use php to perform some mysql Database Operation tests. It is too troublesome to write by yourself. The search results generally contain a lot of useless code. Here we will summarize the operations of php mysql, I hope you don't have to worry about it in the future.

 

The Code is as follows:

<? Php

$ Dbhost = 'localhost'; // database server name

$ Dbuser = 'root'; // user name used to connect to the database

$ Dbpass = '000000'; // password used to connect to the database

$ Dbname = 'products'; // Database Name

 

// Connect to the database

$ Connect = mysql_connect ($ dbhost, $ dbuser, $ dbpass );

If (! $ Connect) exit ('database connection failed! ');

Mysql_select_db ($ dbname, $ connect );

Mysql_query ('set names utf8'); // sets the Encoding

 

// Query operation

$ SQL = "SELECT * FROM 'category '";

$ Result = mysql_query ($ SQL );

While ($ row = mysql_fetch_array ($ result )){

Echo $ row ['id'];

}

// Insert operation

$ SQL = "INSERT INTO 'category '('id', 'name') VALUES (NULL,'". $ name ."')";

$ Result = mysql_query ($ SQL );

If (mysql_affected_rows ()){

Echo 'insert successful, insert ID: ', mysql_insert_id ();

} Else {

Echo 'insertion failed: ', mysql_error ();

}

// Modify the operation

$ SQL = "UPDATE 'category' SET 'name' = '". $ name. "'where' id' ='". $ id ."'";

$ Result = mysql_query ($ SQL );

If (mysql_affected_rows ()){

Echo 'modification successful! ';

}

// Delete operation

$ SQL = "DELETE FROM 'category' WHERE 'id' = '". $ id ."'";

$ Result = mysql_query ($ SQL );

If (mysql_affected_rows ()){

Echo 'deleted! ';

}

// Close the connection

Mysql_close ($ connect );

?>