sforkowany z mirror/friendica
295 wiersze
6.5 KiB
PHP
295 wiersze
6.5 KiB
PHP
<?php
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require_once('include/datetime.php');
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/**
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*
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* MySQL database class
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*
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* For debugging, insert 'dbg(1);' anywhere in the program flow.
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* dbg(0); will turn it off. Logging is performed at LOGGER_DATA level.
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* When logging, all binary info is converted to text and html entities are escaped so that
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* the debugging stream is safe to view within both terminals and web pages.
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*
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*/
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if(! class_exists('dba')) {
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class dba {
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private $debug = 0;
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private $db;
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public $mysqli = true;
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public $connected = false;
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public $error = false;
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function __construct($server,$user,$pass,$db,$install = false) {
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$server = trim($server);
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$user = trim($user);
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$pass = trim($pass);
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$db = trim($db);
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if (!(strlen($server) && strlen($user))){
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$this->connected = false;
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$this->db = null;
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return;
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}
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if($install) {
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if(strlen($server) && ($server !== 'localhost') && ($server !== '127.0.0.1')) {
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if(! dns_get_record($server, DNS_A + DNS_CNAME + DNS_PTR)) {
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$this->error = sprintf( t('Cannot locate DNS info for database server \'%s\''), $server);
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$this->connected = false;
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$this->db = null;
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return;
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}
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}
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}
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if(class_exists('mysqli')) {
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$this->db = @new mysqli($server,$user,$pass,$db);
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if(! mysqli_connect_errno()) {
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$this->connected = true;
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}
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}
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else {
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$this->mysqli = false;
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$this->db = mysql_connect($server,$user,$pass);
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if($this->db && mysql_select_db($db,$this->db)) {
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$this->connected = true;
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}
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}
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if(! $this->connected) {
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$this->db = null;
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if(! $install)
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system_unavailable();
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}
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}
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public function getdb() {
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return $this->db;
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}
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public function q($sql) {
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global $a;
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if((! $this->db) || (! $this->connected))
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return false;
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$this->error = '';
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if(x($a->config,'system') && x($a->config['system'],'db_log'))
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$stamp1 = microtime(true);
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if($this->mysqli)
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$result = @$this->db->query($sql);
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else
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$result = @mysql_query($sql,$this->db);
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if(x($a->config,'system') && x($a->config['system'],'db_log')) {
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$stamp2 = microtime(true);
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$duration = round($stamp2-$stamp1, 3);
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if ($duration > $a->config["system"]["db_loglimit"]) {
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$backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
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@file_put_contents($a->config["system"]["db_log"], $duration."\t".
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basename($backtrace[1]["file"])."\t".
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$backtrace[1]["line"]."\t".$backtrace[2]["function"]."\t".
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substr($sql, 0, 2000)."\n", FILE_APPEND);
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}
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}
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if($this->mysqli) {
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if($this->db->errno)
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$this->error = $this->db->error;
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}
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elseif(mysql_errno($this->db))
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$this->error = mysql_error($this->db);
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if(strlen($this->error)) {
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logger('dba: ' . $this->error);
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}
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if($this->debug) {
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$mesg = '';
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if($result === false)
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$mesg = 'false';
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elseif($result === true)
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$mesg = 'true';
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else {
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if($this->mysqli)
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$mesg = $result->num_rows . ' results' . EOL;
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else
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$mesg = mysql_num_rows($result) . ' results' . EOL;
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}
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$str = 'SQL = ' . printable($sql) . EOL . 'SQL returned ' . $mesg
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. (($this->error) ? ' error: ' . $this->error : '')
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. EOL;
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logger('dba: ' . $str );
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}
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/**
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* If dbfail.out exists, we will write any failed calls directly to it,
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* regardless of any logging that may or may nor be in effect.
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* These usually indicate SQL syntax errors that need to be resolved.
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*/
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if($result === false) {
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logger('dba: ' . printable($sql) . ' returned false.' . "\n" . $this->error);
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if(file_exists('dbfail.out'))
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file_put_contents('dbfail.out', datetime_convert() . "\n" . printable($sql) . ' returned false' . "\n" . $this->error . "\n", FILE_APPEND);
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}
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if(($result === true) || ($result === false))
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return $result;
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$r = array();
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if($this->mysqli) {
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if($result->num_rows) {
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while($x = $result->fetch_array(MYSQLI_ASSOC))
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$r[] = $x;
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$result->free_result();
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}
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}
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else {
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if(mysql_num_rows($result)) {
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while($x = mysql_fetch_array($result, MYSQL_ASSOC))
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$r[] = $x;
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mysql_free_result($result);
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}
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}
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if($this->debug)
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logger('dba: ' . printable(print_r($r, true)));
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return($r);
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}
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public function dbg($dbg) {
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$this->debug = $dbg;
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}
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public function escape($str) {
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if($this->db && $this->connected) {
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if($this->mysqli)
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return @$this->db->real_escape_string($str);
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else
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return @mysql_real_escape_string($str,$this->db);
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}
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}
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function __destruct() {
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if ($this->db)
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if($this->mysqli)
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$this->db->close();
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else
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mysql_close($this->db);
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}
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}}
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if(! function_exists('printable')) {
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function printable($s) {
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$s = preg_replace("~([\x01-\x08\x0E-\x0F\x10-\x1F\x7F-\xFF])~",".", $s);
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$s = str_replace("\x00",'.',$s);
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if(x($_SERVER,'SERVER_NAME'))
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$s = escape_tags($s);
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return $s;
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}}
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// Procedural functions
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if(! function_exists('dbg')) {
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function dbg($state) {
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global $db;
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if($db)
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$db->dbg($state);
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}}
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if(! function_exists('dbesc')) {
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function dbesc($str) {
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global $db;
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if($db && $db->connected)
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return($db->escape($str));
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else
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return(str_replace("'","\\'",$str));
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}}
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// Function: q($sql,$args);
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// Description: execute SQL query with printf style args.
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// Example: $r = q("SELECT * FROM `%s` WHERE `uid` = %d",
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// 'user', 1);
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if(! function_exists('q')) {
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function q($sql) {
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global $db;
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$args = func_get_args();
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unset($args[0]);
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if($db && $db->connected) {
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$stmt = @vsprintf($sql,$args); // Disabled warnings
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//logger("dba: q: $stmt", LOGGER_ALL);
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if($stmt === false)
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logger('dba: vsprintf error: ' . print_r(debug_backtrace(),true), LOGGER_DEBUG);
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return $db->q($stmt);
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}
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/**
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*
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* This will happen occasionally trying to store the
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* session data after abnormal program termination
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*
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*/
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logger('dba: no database: ' . print_r($args,true));
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return false;
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}}
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/**
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*
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* Raw db query, no arguments
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*
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*/
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if(! function_exists('dbq')) {
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function dbq($sql) {
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global $db;
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if($db && $db->connected)
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$ret = $db->q($sql);
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else
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$ret = false;
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return $ret;
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}}
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// Caller is responsible for ensuring that any integer arguments to
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// dbesc_array are actually integers and not malformed strings containing
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// SQL injection vectors. All integer array elements should be specifically
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// cast to int to avoid trouble.
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if(! function_exists('dbesc_array_cb')) {
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function dbesc_array_cb(&$item, $key) {
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if(is_string($item))
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$item = dbesc($item);
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}}
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if(! function_exists('dbesc_array')) {
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function dbesc_array(&$arr) {
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if(is_array($arr) && count($arr)) {
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array_walk($arr,'dbesc_array_cb');
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}
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}}
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function dba_timer() {
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return microtime(true);
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}
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