diff options
Diffstat (limited to 'include/dba.php')
| -rw-r--r-- | include/dba.php | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/include/dba.php b/include/dba.php new file mode 100644 index 000000000..c9f880241 --- /dev/null +++ b/include/dba.php @@ -0,0 +1,271 @@ +<?php + +require_once('include/datetime.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 $mysqli = true; + public $connected = false; + public $error = false; + + function __construct($server,$user,$pass,$db,$install = false) { + + $server = trim($server); + $user = trim($user); + $pass = trim($pass); + $db = trim($db); + + if (!(strlen($server) && strlen($user))){ + $this->connected = false; + $this->db = null; + return; + } + + if($install) { + if(strlen($server) && ($server !== 'localhost') && ($server !== '127.0.0.1')) { + if(! dns_get_record($server, DNS_A + DNS_CNAME + DNS_PTR)) { + $this->error = sprintf( t('Cannot locate DNS info for database server \'%s\''), $server); + $this->connected = false; + $this->db = null; + return; + } + } + } + + if(class_exists('mysqli')) { + $this->db = @new mysqli($server,$user,$pass,$db); + if(! mysqli_connect_errno()) { + $this->connected = true; + } + } + else { + $this->mysqli = false; + $this->db = mysql_connect($server,$user,$pass); + if($this->db && mysql_select_db($db,$this->db)) { + $this->connected = true; + } + } + if(! $this->connected) { + $this->db = null; + if(! $install) + system_unavailable(); + } + } + + public function getdb() { + return $this->db; + } + + public function q($sql) { + + if((! $this->db) || (! $this->connected)) + return false; + + $this->error = ''; + + if($this->mysqli) + $result = @$this->db->query($sql); + else + $result = @mysql_query($sql,$this->db); + + if($this->mysqli) { + if($this->db->errno) + $this->error = $this->db->error; + } + elseif(mysql_errno($this->db)) + $this->error = mysql_error($this->db); + + if(strlen($this->error)) { + logger('dba: ' . $this->error); + } + + if($this->debug) { + + $mesg = ''; + + if($result === false) + $mesg = 'false'; + elseif($result === true) + $mesg = 'true'; + else { + if($this->mysqli) + $mesg = $result->num_rows . ' results' . EOL; + else + $mesg = mysql_num_rows($result) . ' results' . EOL; + } + + $str = 'SQL = ' . printable($sql) . EOL . 'SQL returned ' . $mesg + . (($this->error) ? ' error: ' . $this->error : '') + . EOL; + + logger('dba: ' . $str ); + } + + /** + * If dbfail.out exists, we will write any failed calls directly to it, + * regardless of any logging that may or may nor be in effect. + * These usually indicate SQL syntax errors that need to be resolved. + */ + + if($result === false) { + logger('dba: ' . printable($sql) . ' returned false.' . "\n" . $this->error); + if(file_exists('dbfail.out')) + file_put_contents('dbfail.out', datetime_convert() . "\n" . printable($sql) . ' returned false' . "\n" . $this->error . "\n", FILE_APPEND); + } + + if(($result === true) || ($result === false)) + return $result; + + $r = array(); + if($this->mysqli) { + if($result->num_rows) { + while($x = $result->fetch_array(MYSQLI_ASSOC)) + $r[] = $x; + $result->free_result(); + } + } + else { + if(mysql_num_rows($result)) { + while($x = mysql_fetch_array($result, MYSQL_ASSOC)) + $r[] = $x; + mysql_free_result($result); + } + } + + + if($this->debug) + logger('dba: ' . printable(print_r($r, true))); + return($r); + } + + public function dbg($dbg) { + $this->debug = $dbg; + } + + public function escape($str) { + if($this->db && $this->connected) { + if($this->mysqli) + return @$this->db->real_escape_string($str); + else + return @mysql_real_escape_string($str,$this->db); + } + } + + function __destruct() { + if ($this->db) + if($this->mysqli) + $this->db->close(); + else + mysql_close($this->db); + } +}} + +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) { + $stmt = vsprintf($sql,$args); + if($stmt === false) + logger('dba: vsprintf error: ' . print_r(debug_backtrace(),true)); + return $db->q($stmt); + } + + /** + * + * 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'); + } +}} |