<?php /** * * MySQL database class * * For debugging, insert 'dbg(1);' anywhere in the program flow. * dbg(0); will turn it off. Logging is performed at LOGGER_DATA level. * When logging, all binary info is converted to text and html entities are escaped so that * the debugging stream is safe to view within both terminals and web pages. * */ if(! class_exists('dba')) { class dba { private $debug = 0; private $db; public $connected = false; function __construct($server,$user,$pass,$db,$install = false) { $server = trim($server); $user = trim($user); $pass = trim($pass); $db = trim($db); if($install) { if(strlen($server) && ($server !== 'localhost') && ($server !== '127.0.0.1')) { if(! dns_get_record($server, DNS_A + DNS_CNAME + DNS_PTR)) { notice( sprintf( t('Cannot locate DNS info for database server \'%s\''), $server)); $this->connected = false; $this->db = null; return; } } } $this->db = @new mysqli($server,$user,$pass,$db); if(! mysqli_connect_errno()) { $this->connected = true; } else { $this->db = null; if(! $install) system_unavailable(); } } public function getdb() { return $this->db; } public function q($sql) { if((! $this->db) || (! $this->connected)) return false; $result = @$this->db->query($sql); if($this->debug) { $mesg = ''; if($this->db->errno) logger('dba: ' . $this->db->error); if($result === false) $mesg = 'false'; elseif($result === true) $mesg = 'true'; else $mesg = $result->num_rows . ' results' . EOL; $str = 'SQL = ' . printable($sql) . EOL . 'SQL returned ' . $mesg . EOL; logger('dba: ' . $str ); } else { /** * If dbfail.out exists, we will write any failed calls directly to it, * regardless of any logging that may or may nor be in effect. * These usually indicate SQL syntax errors that need to be resolved. */ if($result === false) { logger('dba: ' . printable($sql) . ' returned false.'); if(file_exists('dbfail.out')) file_put_contents('dbfail.out', printable($sql) . ' returned false' . "\n", FILE_APPEND); } } if(($result === true) || ($result === false)) return $result; $r = array(); if($result->num_rows) { while($x = $result->fetch_array(MYSQL_ASSOC)) $r[] = $x; $result->free_result(); } if($this->debug) logger('dba: ' . printable(print_r($r, true)), LOGGER_DATA); return($r); } public function dbg($dbg) { $this->debug = $dbg; } public function escape($str) { if($this->db && $this->connected) return @$this->db->real_escape_string($str); } function __destruct() { @$this->db->close(); } }} if(! function_exists('printable')) { function printable($s) { $s = preg_replace("~([\x01-\x08\x0E-\x0F\x10-\x1F\x7F-\xFF])~",".", $s); $s = str_replace("\x00",'.',$s); if(x($_SERVER,'SERVER_NAME')) $s = escape_tags($s); return $s; }} // Procedural functions if(! function_exists('dbg')) { function dbg($state) { global $db; if($db) $db->dbg($state); }} if(! function_exists('dbesc')) { function dbesc($str) { global $db; if($db && $db->connected) return($db->escape($str)); else return(str_replace("'","\\'",$str)); }} // Function: q($sql,$args); // Description: execute SQL query with printf style args. // Example: $r = q("SELECT * FROM `%s` WHERE `uid` = %d", // 'user', 1); if(! function_exists('q')) { function q($sql) { global $db; $args = func_get_args(); unset($args[0]); if($db && $db->connected) { $ret = $db->q(vsprintf($sql,$args)); return $ret; } /** * * This will happen occasionally trying to store the * session data after abnormal program termination * */ logger('dba: no database: ' . print_r($args,true)); return false; }} /** * * Raw db query, no arguments * */ if(! function_exists('dbq')) { function dbq($sql) { global $db; if($db && $db->connected) $ret = $db->q($sql); else $ret = false; return $ret; }} // Caller is responsible for ensuring that any integer arguments to // dbesc_array are actually integers and not malformed strings containing // SQL injection vectors. All integer array elements should be specifically // cast to int to avoid trouble. if(! function_exists('dbesc_array_cb')) { function dbesc_array_cb(&$item, $key) { if(is_string($item)) $item = dbesc($item); }} if(! function_exists('dbesc_array')) { function dbesc_array(&$arr) { if(is_array($arr) && count($arr)) { array_walk($arr,'dbesc_array_cb'); } }}