<?php
/******************************************** INSTRUCTIONS TO USE **************************************************************
* --------------------------------------------------------------------------------------------------------------------------
* Program : MySQL Database Layer With Dynamic SQL Generators, PHP Class Library
* Files : database.inc.php, test.php
* Author : Lasantha Samarakoon
* Date released : Monday, September 27, 2009
* Email : lasn1987@gmail.com
* Licence : http://www.gnu.org/licenses/gpl.txt
* --------------------------------------------------------------------------------------------------------------------------
* This program is a freeware, which falls under GNU Genral Public Licence.
* ---------------------------------------------------------------------------------------------------------------------------
* You can modify this program, without any permission from the author. But be kind enough to send the updated version to the
* author through the above mentioned Email address.
* ---------------------------------------------------------------------------------------------------------------------------
* Documentation:
* Please refer the test.php file for hints on the usage of this class library.
* ---------------------------------------------------------------------------------------------------------------------------
*
* ************************************* PROUD TO BE A SRI LANKAN...!!! ******************************************************
DOCUMENTATION:
Database class:
Properties:
string host
- database host name
string username
- database server's username
string password
- database server's password
string database
- database name
string connection
- database connection handler
Methods:
new Database([string host], [string username], [string password], [string database])
- constructor
object connect() throws DatabaseException
- connect to the database server
object use_db([string database]) throws DatabaseException
- change the working database
resultset query($sql) throws DatabaseException
- execute an sql query and return the resultset if available
resultset select(string table_name, [array fields], [array criteria]) throws DatabaseException
- sql select command generator
- if fields = null, it means select all
object insert(string table_name, array values) throws DatabaseException
- sql insert command generate
object update(string table_name, array values, [array criteria]) throws DatabaseException
- sql update command generator
object delete(string table_name, [array criteria]) throws DatabaseException
- sql delete command generator
object refresh() throws DatabaseException
- refresh the connection by closing and re-connecting
TEST UNIT:
Create database:
Database name: test
Table: users
- uid int : not null, primary key, auto increment
- username varchar(20) : not null
- password varchar(20) : not null
- role varchar(10) : not null
Assumptions:
Database host : localhost
Database username : root
Database password : mypass
*/
require_once 'database.inc.php';
// this method displays data by fetching it from the database
function display_data($db) {
// select username, password from users
$res = $db->select('users', array('username', 'password'));
// traverse through the resultset
while($r = mysql_fetch_array($res)) {
echo "username: " . $r['username'] . "<br />\n";
echo "password: " . $r['password'] . "<br />\n";
echo "<hr />\n";
}
echo "<hr />\n";
}
// create object
$db = new Database('localhost', 'root', 'mypass');
// connect to the database + change the database file
$db->connect()->use_db('test');
// add few data
$db->insert('users', array("username" => "\"user1\"", "password" => "\"pass1\"", "role" => "\"admin\""));
$db->insert('users', array("username" => "\"user2\"", "password" => "\"pass2\"", "role" => "\"manager\""));
$db->insert('users', array("username" => "\"user3\"", "password" => "\"pass3\"", "role" => "\"clerk\""));
$db->insert('users', array("username" => "\"user4\"", "password" => "\"pass4\"", "role" => "\"guest\""));
display_data($db);
// update the table
$db->update('users', array("username" => "\"new_user\""), array("uid = 2"));
display_data($db);
// delete row from the table
$db->delete('users', array("username = \"user3\""));
display_data($db);
?>
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