added db.php

diff --git a/db.php b/db.php
new file mode 100644 (file)
index 0000000..89e972e
--- /dev/null
+++ b/db.php
@@ -0,0 +1,210 @@
+<?php
+
+#  Copyright (C) 2006 Jason Woofenden
+#
+#  This file is part of wfpl.
+#
+#  wfpl is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2, or (at your option)
+#  any later version.
+#
+#  wfpl is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+#  General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with wfpl; see the file COPYING.  If not, write to the
+#  Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+#  MA 02111-1307, USA.
+
+
+require_once('code/wfpl/encode.php');
+require_once('code/wfpl/format.php');
+
+# db_connect() parameters:
+#
+# database: the name of the database you want to connect to. Defaults to the
+# second-to-last part of the domain name. eg for foo.example.com it would be
+# "example".
+#
+# user: username for connecting to the database. Defaults to
+# $GLOBALS['db_username'] or (if that's not set) "www".
+#
+# password: password for connecting to the database. Defaults to
+# $GLOBALS['db_password'] or (if that's not set "".
+#
+# RETURNS: the database connection handle. You'll only need this if you
+# want to have multiple databases open at once.
+
+function db_connect($database = 'auto', $user = 'auto', $pass = 'auto', $host = 'localhost') {
+       if($database == 'auto') {
+               if(isset($GLOBALS['db_name'])) {
+                       $database = $GLOBALS['db_name'];
+               } else {
+                       $host = $_SERVER['SERVER_NAME'];
+                       $host = explode('.', $host);
+                       array_pop($host);
+                       $database = array_pop($host);
+                       unset($host);
+               }
+       }
+
+       if($user == 'auto') {
+               if(isset($GLOBALS['db_username'])) {
+                       $user = $GLOBALS['db_username'];
+               } else {
+                       $user = 'www';
+               }
+       }
+
+       if($pass == 'auto') {
+               if(isset($GLOBALS['db_password'])) {
+                       $pass = $GLOBALS['db_password'];
+               } else {
+                       $pass = '';
+               }
+       }
+
+       $GLOBALS['wfpl_db_handle'] = mysql_connect($host, $user, $pass);
+       if(!$GLOBALS['wfpl_db_handle']) {
+               die('Could not connect to the database: ' . mysql_error());
+       }
+
+       if(!mysql_select_db($database, $GLOBALS['wfpl_db_handle'])) {
+               die("Couldn not access database \"$database\": " . mysql_error());
+       }
+
+       return $GLOBALS['wfpl_db_handle'];
+}
+
+# Unless you're doing something unusual like an ALTER TABLE don't call this directly
+function db_send_query($sql) {
+       #echo("Sending query: " . enc_html($sql) . "<br>\n");
+       $result = mysql_query($sql);
+       if(!$result) {
+               die(enc_html('DATABASE ERROR: ' . mysql_error() . ' in the following query: ' . $sql));
+       }
+
+       return $result;
+}
+
+# All select queries use this to generate the where clause, so they can work
+# like printf. Currently three % codes are supported:
+#
+# %%  put a % in the output
+# %i  put an integer in the output (strips non-numeric digits, and puts in 0 if blank)
+# %"  output double quotes, surrounding the variable which is encoded to be in there.
+# %s  output encoded to be in double quotes, but don't output the quotes
+#
+# complex example: db_get_rows('mytable', 'id', 'name=%" or company like "%%%s%%"', $name, $company_partial);
+
+function db_printf($str) {
+       $args = func_get_args();
+       $args = array_slice($args, 1);
+       _db_printf($str, $args);
+}
+
+# This function does the work, but takes the parameters in an array, and backwards.
+function _db_printf($str, $args) {
+       $args = array_reverse($args); # because array_pop() takes from the end
+       $out = '';
+       while($str) {
+               $pos = strpos($str, '%');
+               if($pos === false) { # not found
+                       # we hit the end.
+                       return $out . $str;
+               }
+               # move everything up to (but not including) % to the output
+               $out .= substr($str, 0, $pos);
+
+               # grab the character after the %
+               $chr = substr($str, $pos + 1, 1);
+
+               # remove the stuff we've read from input
+               $str = substr($str, $pos + 2);
+
+               if($chr == '"') {
+                       $out .= '"' . enc_sql(array_pop($args)) . '"';
+               } elseif($chr == 'i') {
+                       $int = format_int(array_pop($args));
+                       if($int == '') $int = '0';
+                       $out .= $int;
+               } else {
+                       $out .= $chr;
+               }
+       }
+
+       return $out;
+}
+
+
+function db_send_get($table, $columns, $where = '', $args) {
+       $sql = "SELECT $columns FROM $table";
+       if($where) {
+               $sql .= ' WHERE ' . _db_printf($where, $args);
+       }
+
+       return db_send_query($sql);
+}
+
+
+function db_get_rows($table, $columns, $where = '') {
+       $args = func_get_args();
+       $args = array_slice($args, 3);
+       $result = db_send_get($table, $columns, $where, $args);
+
+       $rows = array();
+       while($row = mysql_fetch_row($result)) {
+               $rows[] = $row;
+       }
+
+       mysql_free_result($result);
+
+       return $rows;
+}
+
+function db_get_column($table, $columns, $where = '') {
+       $args = func_get_args();
+       $args = array_slice($args, 3);
+       $result = db_send_get($table, $columns, $where, $args);
+
+       $column = array();
+       while($row = mysql_fetch_row($result)) {
+               $column[] = $row[0];
+       }
+
+       mysql_free_result($result);
+
+       return $column;
+}
+
+function db_get_row($table, $columns, $where = '') {
+       $args = func_get_args();
+       $args = array_slice($args, 3);
+       $result = db_send_get($table, $columns, $where, $args);
+
+       $row = mysql_fetch_row($result);
+
+       mysql_free_result($result);
+
+       return $row;
+}
+
+function db_get_value($table, $columns, $where = '') {
+       $args = func_get_args();
+       $args = array_slice($args, 3);
+       $result = db_send_get($table, $columns, $where, $args);
+
+       $value = mysql_fetch_row($result);
+       if($value !== false) {
+               $value = $value[0];
+       }
+
+       mysql_free_result($result);
+
+       return $value;
+}
+
+?>