source: trunk/admin/inc/ckeditor/filemanager/db.class.php@ 253

Last change on this file since 253 was 239, checked in by luc, 9 years ago

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[239]1<?php
2/***************************************************************************
3 * Package : MySQL Database Class
4 * Version : 1.0
5 * Date : 05/10/2009
6 * Copyright : (C) 2009 Studio77D
7 * Author : Rostislav Stoyanov
8 * Email : stoyanovrr@gmail.com
9 * Site : http://www.studio77d.com/
10 * File : db.class.php
11 * Usage : http://www.2smart4you.net/php-mysql-database-connection-class/
12 *
13 * License:
14 * This class is dual-licensed under the GNU General Public License and the MIT License and
15 * is copyright (C) 2009 Studio77D.
16 *
17 * This program is free software: you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License as published by
19 * the Free Software Foundation, either version 3 of the License, or
20 * (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program. If not, see <http://www.gnu.org/licenses/>.
29 ***************************************************************************/
30
31class DBConnection {
32 /**
33 * Connection link.
34 * @var string
35 */
36 private $connection;
37
38 /**
39 * Keeps the info of the last used connection.
40 * @var string
41 */
42 private $last_connection=null;
43
44 /**
45 * Keeps the info of the last used MySQL query.
46 * @var string
47 */
48 private $msql='';
49
50 /**
51 * Returns the text of the error message from last MySQL operation.
52 * @var string
53 */
54 private $error='';
55
56 /**
57 * Returns the numerical value of the error message from last MySQL operation.
58 * @var integer
59 */
60 private $errno='';
61
62 /**
63 * Is there any locked tables right now?
64 * @var boolean
65 */
66 private $is_locked=false;
67
68 /**
69 * The Constructor. Initializes a database connection and selects database.
70 * @param string Database host
71 * @param string Database username
72 * @param string Database password
73 * @param string Database name
74 *
75 * @return boolean
76 */
77 function DBConnection($db_host='', $db_user='', $db_pass='', $db_name='') {
78 $this->connection=mysql_connect($db_host, $db_user, $db_pass);
79
80 if ($this->connection){
81 if (mysql_select_db($db_name, $this->connection)){
82 $this->last_connection=&$this->connection;
83 return $this->connection;
84 }else{ // if we can't select the database
85 $this->display_errors('- Could not select database: '.$db_name.'');
86 return false;
87 }
88 }else{ // if we couldn't connect to the database
89 $this->display_errors('- Could not connect to database: '.$db_name.'');
90 return false;
91 }
92 }
93
94 /**
95 * Send a MySQL query.
96 * @param string Query to run
97 * @return mixed
98 */
99 function rq($msql) {
100 $this->last_connection=&$this->connection;
101 $this->msql=&$msql;
102 $result=mysql_query($msql, $this->connection);
103 if ($result){
104 $this->queries_count++;
105 return $result;
106 }else{
107 $this->display_errors();
108 return false;
109 }
110 }
111
112 /**
113 * Fetch a result row as an associative array.
114 * @param string The query which we send.
115 * @return array
116 */
117 function fetch($query) {
118 return mysql_fetch_assoc($query);
119 }
120
121 /**
122 * Fetch a result row as an object
123 * @param string The query which we send.
124 * @return array
125 */
126 function ofetch($query) {
127 return mysql_fetch_object($query);
128 }
129
130 /**
131 * Fetch a result row as an associative array, a numeric array, or both.
132 * @param string The query which we send.
133 * @return array
134 */
135 function afetch($query) {
136 return mysql_fetch_array($query);
137 }
138
139 /**
140 * Returns the number of rows from the executed query.
141 * @param string The query result.
142 * @return integer
143 */
144 function num_rows($result) {
145 return mysql_num_rows($result);
146 }
147
148 /**
149 * Retuns the number of rows affected bt last used query.
150 * @return integer
151 */
152 function affected_rows() {
153 return mysql_affected_rows($this->last_connection);
154 }
155
156 /**
157 * Returns the total number of executed queries. Usually goes to the end of scripts.
158 * @return integer
159 */
160 function num_queries() {
161 return $this->queries_count;
162 }
163
164 /**
165 * Lock database table(s).
166 * @param array Array of table => Lock type
167 * @return void
168 */
169
170 function lock_tables($tables) {
171 if (is_array($tables)&&count($tables)>0){
172 $msql='';
173
174 foreach ($tables as $name=>$type){
175 $msql.=(!empty($msql)?', ':'').''.$name.' '.$type.'';
176 }
177
178 $this->rq('LOCK TABLES '.$msql.'');
179 $this->is_locked=true;
180 }
181 }
182
183 /* Unlock database table(s) */
184 function unlock_tables() {
185 if ($this->is_locked){
186 $this->rq('UNLOCK TABLES');
187 $this->is_locked=false;
188 }
189 }
190
191 /**
192 * Returns the last unique ID (auto_increment field) from the last inserted row.
193 * @return integer
194 */
195 function last_id() {
196 return mysql_insert_id($this->connection);
197 }
198
199 /**
200 * Escapes a value to make it safe for using in queries.
201 * @param string String to be escaped
202 * @param bool If escaping of % and _ is also needed
203 * @return string
204 */
205 function string_escape($string, $full_escape=false) {
206 $string=stripslashes($string);
207
208 if ($full_escape) $string=str_replace(array('%', '_'), array('\%', '\_'), $string);
209
210 if (function_exists('mysql_real_escape_string')){
211 return mysql_real_escape_string($string, $this->connection);
212 }else{
213 return mysql_escape_string($string);
214 }
215 }
216
217 /**
218 * Free result memory.
219 * @param string The result which we want to release.
220 * @return boolean
221 */
222 function free_result($result) {
223 return mysql_free_result($result);
224 }
225
226 /**
227 * Closes the MySQL connection.
228 * @param none
229 * @return boolean
230 */
231 function close() {
232 $this->msql='';
233 return mysql_close($this->connection);
234 }
235
236 /**
237 * Returns the MySQL error message.
238 * @return string
239 */
240 function error() {
241 $this->error=(is_null($this->last_connection))?'':mysql_error($this->last_connection);
242 return $this->error;
243 }
244
245 /**
246 * Returns the MySQL error number.
247 * @return string
248 */
249 function errno() {
250 $this->errno=(is_null($this->last_connection))?0:mysql_errno($this->last_connection);
251 return $this->errno;
252 }
253
254 /**
255 * If database error occur, the script will be stopped and an error message displayed.
256 * @param string The error message. If it's empty, it will be created with $this->sql.
257 * @return string
258 */
259 function display_errors($error_message='') {
260 if ($this->last_connection){
261 $this->error=$this->error($this->last_connection);
262 $this->errno=$this->errno($this->last_connection);
263 }
264
265 /** CHECK $_SERVER to add more details **/
266 if(!$error_message) $error_message='- Error in query: '.$this->msql;
267
268 $message=''.$error_message.'<br />
269 '.(($this->errno!='')?'- Error: '.$this->error.' (Error #'.$this->errno.')<br />':'').'
270 - File: '.$_SERVER['SCRIPT_FILENAME'].'<br />';
271
272 die('Database problem occur, please try again later.<br />'.$message.'');
273 }
274
275 /*** Shortcut functions ***/
276 /**
277 * For fetching single row with possibility to enter conditions
278 *
279 * @param string From which table(s) to get result
280 * @param string What conditions to use
281 * @param string Which field to fetch. Very usable if you need to make JOINs
282 *
283 * @return mixed
284 */
285 function getRow($table, $conditions='1', $select_what='*') {
286 $query='SELECT '.$select_what.' FROM '.$table.' WHERE '.$conditions;
287 $res=$this->rq($query);
288 $row=$this->fetch($res);
289 return $row;
290 }
291}
292?>
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