3 # Copyright (C) 2006 Jason Woofenden
5 # This program is free software: you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation, either version 3 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program. If not, see <http://www.gnu.org/licenses/>.
19 require_once('code/wfpl/encode.php');
20 require_once('code/wfpl/format.php');
22 # db_connect() -- connect to a mysql database
26 # database: the name of the database you want to connect to. Defaults to the
27 # second-to-last part of the domain name. eg for foo.example.com it would be
30 # user: username for connecting to the database. Defaults to
31 # $GLOBALS['db_username'] or (if that's not set) "www".
33 # password: password for connecting to the database. Defaults to
34 # $GLOBALS['db_password'] or (if that's not set "".
38 # the database connection handle. You'll only need this if you want to have
39 # multiple databases open at once.
41 function db_connect($database = 'auto', $user = 'auto', $pass = 'auto', $host = 'localhost') {
42 if($database == 'auto') {
43 if(isset($GLOBALS['db_name'])) {
44 $database = $GLOBALS['db_name'];
46 $host = $_SERVER['SERVER_NAME'];
47 $host = explode('.', $host);
49 $database = array_pop($host);
55 if(isset($GLOBALS['db_username'])) {
56 $user = $GLOBALS['db_username'];
63 if(isset($GLOBALS['db_password'])) {
64 $pass = $GLOBALS['db_password'];
70 $GLOBALS['wfpl_db_handle'] = mysql_connect($host, $user, $pass);
71 if(!$GLOBALS['wfpl_db_handle']) {
72 die('Could not connect to the database: ' . mysql_error());
75 if(!mysql_select_db($database, $GLOBALS['wfpl_db_handle'])) {
76 die("Couldn not access database \"$database\": " . mysql_error($GLOBALS['wfpl_db_handle']));
79 return $GLOBALS['wfpl_db_handle'];
82 # Unless you're doing something unusual like an ALTER TABLE don't call this directly
83 function db_send_query($sql) {
84 #echo("Sending query: " . enc_html($sql) . "<br>\n");
85 $result = mysql_query($sql, $GLOBALS['wfpl_db_handle']);
87 die(enc_html('DATABASE ERROR: ' . mysql_error($GLOBALS['wfpl_db_handle']) . ' in the following query: ' . $sql));
93 # All select queries use this to generate the where clause, so they can work
94 # like printf. Currently three % codes are supported:
96 # %% put a % in the output
97 # %i put an integer in the output (strips non-numeric digits, and puts in 0 if blank)
98 # %" output double quotes, surrounding the variable which is encoded to be in there.
99 # %s output encoded to be in double quotes, but don't output the quotes
101 # complex example: db_get_rows('mytable', 'id', 'where name=%" or company like "%%%s%%"', $name, $company_partial);
103 function db_printf($str) {
104 $args = func_get_args();
105 $args = array_slice($args, 1);
106 return _db_printf($str, $args);
109 # This function does the work, but takes the parameters in an array
110 function _db_printf($str, $args) {
113 $pos = strpos($str, '%');
114 if($pos === false) { # not found
118 # move everything up to (but not including) % to the output
119 $out .= substr($str, 0, $pos);
121 # grab the character after the %
122 $chr = substr($str, $pos + 1, 1);
124 # remove the stuff we've read from input
125 $str = substr($str, $pos + 2);
128 $out .= '"' . enc_sql(array_shift($args)) . '"';
129 } elseif($chr == 's') {
130 $out .= enc_sql(array_shift($args));
131 } elseif($chr == 'i') {
132 $int = format_int(array_shift($args));
133 if($int == '') $int = '0';
144 function db_send_get($table, $columns, $where, $args) {
145 $sql = "SELECT $columns FROM $table";
147 $sql .= ' ' . _db_printf($where, $args);
150 return db_send_query($sql);
154 function db_get_rows($table, $columns, $where = '') {
155 $args = func_get_args();
156 $args = array_slice($args, 3);
157 $result = db_send_get($table, $columns, $where, $args);
160 while($row = mysql_fetch_row($result)) {
164 mysql_free_result($result);
169 function db_get_column($table, $columns, $where = '') {
170 $args = func_get_args();
171 $args = array_slice($args, 3);
172 $result = db_send_get($table, $columns, $where, $args);
175 while($row = mysql_fetch_row($result)) {
179 mysql_free_result($result);
184 function db_get_row($table, $columns, $where = '') {
185 $args = func_get_args();
186 $args = array_slice($args, 3);
187 $result = db_send_get($table, $columns, $where, $args);
189 $row = mysql_fetch_row($result);
191 mysql_free_result($result);
196 function db_get_value($table, $columns, $where = '') {
197 $args = func_get_args();
198 $args = array_slice($args, 3);
199 $result = db_send_get($table, $columns, $where, $args);
201 $value = mysql_fetch_row($result);
202 if($value !== false) {
206 mysql_free_result($result);
211 function db_count($table, $where = '') {
212 $args = func_get_args();
213 array_splice($args, 1, 0, array('count(*)'));
214 return call_user_func_array('db_get_value', $args);
217 # call either of these ways:
219 # db_insert('people', 'name,company', 'jason', 'widgets ltd');
221 # db_insert('people', 'name,company', array('jason', 'widgets ltd'));
222 function db_insert($table, $columns, $values) {
223 if(!is_array($values)) {
224 $values = func_get_args();
225 $values = array_slice($values, 2);
228 db_insert_ish('INSERT', $table, $columns, $values);
230 # same as above, except uses the "replace" command instead of "insert"
231 function db_replace($table, $columns, $values) {
232 if(!is_array($values)) {
233 $values = func_get_args();
234 $values = array_slice($values, 2);
237 db_insert_ish('REPLACE', $table, $columns, $values);
240 # return the value mysql made up for the auto_increment field (for the last insert)
241 function db_auto_id() {
242 return mysql_insert_id($GLOBALS['wfpl_db_handle']);
246 # used to implement db_insert() and db_replace()
247 function db_insert_ish($command, $table, $columns, $values) {
250 foreach($values as $value) {
251 if($sql) $sql .= ',';
252 $sql .= '"' . enc_sql($value) . '"';
255 $sql = "$command INTO $table ($columns) values($sql)";
260 # to be consistant with the syntax of the other db functions, $values can be an
261 # array, a single value, or multiple parameters.
263 # as usual the where clause stuff is optional, but it will ofcourse update the
264 # whole table if you leave it off.
268 # # name everybody Bruce
269 # db_update('users', 'name', 'Bruce');
271 # # name user #6 Bruce
272 # db_update('users', 'name', 'Bruce', 'where id=%i', 6);
274 # # update the whole bit for user #6
275 # db_update('users', 'name,email,description', 'Bruce', 'bruce@example.com', 'is a cool guy', 'where id=%i', 6);
277 # # update the whole bit for user #6 (passing data as an array)
278 # $data = array('Bruce', 'bruce@example.com', 'is a cool guy');
279 # db_update('users', 'name,email,description', $data, 'where id=%i', 6);
281 # The prototype is really something like this:
282 # db_update(table, columns, values..., where(optional), where_args...(optional))
283 function db_update($table, $columns, $values) {
284 $args = func_get_args();
285 $args = array_slice($args, 2);
286 $columns = explode(',', $columns);
287 $num_fields = count($columns);
289 if(is_array($values)) {
290 $args = array_slice($args, 1);
292 $values = array_slice($args, 0, $num_fields);
293 $args = array_slice($args, $num_fields);
297 for($i = 0; $i < $num_fields; ++$i) {
301 $sql .= $columns[$i] . ' = "' . enc_sql($values[$i]) . '"';
305 $sql = "UPDATE $table SET $sql";
307 # if there's any more arguments
310 $args = array_slice($args, 1);
313 # any left for where claus arguments?
315 $sql .= _db_printf($where, $args);
325 # pass args for printf-style where clause as usual
326 function db_delete($table, $where = '') {
327 $sql = "DELETE FROM $table";
330 $args = func_get_args();
331 $args = array_slice($args, 2);
333 $sql .= _db_printf($where, $args);