<?php<liu21st@gmail.com>
namespace Think\Db;
use Think\Config;
use Think\Debug;
use Think\Log;
use PDO;
class Lite {
protected $PDOStatement = null;
protected $model = '_think_';
protected $queryStr = '';
protected $modelSql = array();
protected $lastInsID = null;
protected $numRows = 0;
protected $transTimes = 0;
protected $error = '';
protected $linkID = array();
protected $_linkID = null;
protected $config = array(
'type' => '', 'hostname' => '127.0.0.1', 'database' => '', 'username' => '', 'password' => '', 'hostport' => '', 'dsn' => '', 'params' => array(), 'charset' => 'utf8', 'prefix' => '', 'debug' => false, 'deploy' => 0, 'rw_separate' => false, 'master_num' => 1, 'slave_no' => '', );
protected $comparison = array('eq'=>'=','neq'=>'<>','gt'=>'>','egt'=>'>=','lt'=>'<','elt'=>'<=','notlike'=>'NOT LIKE','like'=>'LIKE','in'=>'IN','notin'=>'NOT IN');
protected $selectSql = 'SELECT%DISTINCT% %FIELD% FROM %TABLE%%JOIN%%WHERE%%GROUP%%HAVING%%ORDER%%LIMIT% %UNION%%COMMENT%';
protected $queryTimes = 0;
protected $executeTimes = 0;
protected $options = array(
PDO::ATTR_CASE => PDO::CASE_LOWER,
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
PDO::ATTR_ORACLE_NULLS => PDO::NULL_NATURAL,
PDO::ATTR_STRINGIFY_FETCHES => false,
);
public function __construct($config=''){
if(!empty($config)) {
$this->config = array_merge($this->config,$config);
if(is_array($this->config['params'])){
$this->options += $this->config['params'];
}
}
}
public function connect($config='',$linkNum=0) {
if ( !isset($this->linkID[$linkNum]) ) {
if(empty($config)) $config = $this->config;
try{
if(empty($config['dsn'])) {
$config['dsn'] = $this->parseDsn($config);
}
if(version_compare(PHP_VERSION,'5.3.6','<=')){ $this->options[PDO::ATTR_EMULATE_PREPARES] = false;
}
$this->linkID[$linkNum] = new PDO( $config['dsn'], $config['username'], $config['password'],$this->options);
}catch (\PDOException $e) {
E($e->getMessage());
}
}
return $this->linkID[$linkNum];
}
protected function parseDsn($config){}
public function free() {
$this->PDOStatement = null;
}
public function query($str,$bind=array()) {
$this->initConnect(false);
if ( !$this->_linkID ) return false;
$this->queryStr = $str;
if(!empty($bind)){
$that = $this;
$this->queryStr = strtr($this->queryStr,array_map(function($val) use($that){ return '\''.$that->escapeString($val).'\''; },$bind));
}
if ( !empty($this->PDOStatement) ) $this->free();
$this->queryTimes++;
N('db_query',1); $this->debug(true);
$this->PDOStatement = $this->_linkID->prepare($str);
if(false === $this->PDOStatement)
E($this->error());
foreach ($bind as $key => $val) {
if(is_array($val)){
$this->PDOStatement->bindValue($key, $val[0], $val[1]);
}else{
$this->PDOStatement->bindValue($key, $val);
}
}
$result = $this->PDOStatement->execute();
$this->debug(false);
if ( false === $result ) {
$this->error();
return false;
} else {
return $this->getResult();
}
}
public function execute($str,$bind=array()) {
$this->initConnect(true);
if ( !$this->_linkID ) return false;
$this->queryStr = $str;
if(!empty($bind)){
$that = $this;
$this->queryStr = strtr($this->queryStr,array_map(function($val) use($that){ return '\''.$that->escapeString($val).'\''; },$bind));
}
if ( !empty($this->PDOStatement) ) $this->free();
$this->executeTimes++;
N('db_write',1); $this->debug(true);
$this->PDOStatement = $this->_linkID->prepare($str);
if(false === $this->PDOStatement) {
E($this->error());
}
foreach ($bind as $key => $val) {
if(is_array($val)){
$this->PDOStatement->bindValue($key, $val[0], $val[1]);
}else{
$this->PDOStatement->bindValue($key, $val);
}
}
$result = $this->PDOStatement->execute();
$this->debug(false);
if ( false === $result) {
$this->error();
return false;
} else {
$this->numRows = $this->PDOStatement->rowCount();
if(preg_match("/^\s*(INSERT\s+INTO|REPLACE\s+INTO)\s+/i", $str)) {
$this->lastInsID = $this->_linkID->lastInsertId();
}
return $this->numRows;
}
}
public function startTrans() {
$this->initConnect(true);
if ( !$this->_linkID ) return false;
if ($this->transTimes == 0) {
$this->_linkID->beginTransaction();
}
$this->transTimes++;
return ;
}
public function commit() {
if ($this->transTimes > 0) {
$result = $this->_linkID->commit();
$this->transTimes = 0;
if(!$result){
$this->error();
return false;
}
}
return true;
}
public function rollback() {
if ($this->transTimes > 0) {
$result = $this->_linkID->rollback();
$this->transTimes = 0;
if(!$result){
$this->error();
return false;
}
}
return true;
}
private function getResult() {
$result = $this->PDOStatement->fetchAll(PDO::FETCH_ASSOC);
$this->numRows = count( $result );
return $result;
}
public function getQueryTimes($execute=false){
return $execute?$this->queryTimes+$this->executeTimes:$this->queryTimes;
}
public function getExecuteTimes(){
return $this->executeTimes;
}
public function close() {
$this->_linkID = null;
}
public function error() {
if($this->PDOStatement) {
$error = $this->PDOStatement->errorInfo();
$this->error = $error[1].':'.$error[2];
}else{
$this->error = '';
}
if('' != $this->queryStr){
$this->error .= "\n [ SQL语句 ] : ".$this->queryStr;
}
trace($this->error,'','ERR');
if($this->config['debug']) E($this->error);
}else{
return $this->error;
}
}
public function getLastSql($model='') {
return $model?$this->modelSql[$model]:$this->queryStr;
}
public function getLastInsID() {
return $this->lastInsID;
}
public function getError() {
return $this->error;
}
public function escapeString($str) {
return addslashes($str);
}
public function setModel($model){
$this->model = $model;
}
protected function debug($start) {
if($this->config['debug']) if($start) {
G('queryStartTime');
}else{
$this->modelSql[$this->model] = $this->queryStr;
G('queryEndTime');
trace($this->queryStr.' [ RunTime:'.G('queryStartTime','queryEndTime').'s ]','','SQL');
}
}
}
protected function initConnect($master=true) {
if(!empty($this->config['deploy']))
$this->_linkID = $this->multiConnect($master);
else
if ( !$this->_linkID ) $this->_linkID = $this->connect();
}
protected function multiConnect($master=false) {
$_config['username'] = explode(',',$this->config['username']);
$_config['password'] = explode(',',$this->config['password']);
$_config['hostname'] = explode(',',$this->config['hostname']);
$_config['hostport'] = explode(',',$this->config['hostport']);
$_config['database'] = explode(',',$this->config['database']);
$_config['dsn'] = explode(',',$this->config['dsn']);
$_config['charset'] = explode(',',$this->config['charset']);
if($this->config['rw_separate']){
if($master)
$r = floor(mt_rand(0,$this->config['master_num']-1));
else{
if(is_numeric($this->config['slave_no'])) $r = $this->config['slave_no'];
}else{
$r = floor(mt_rand($this->config['master_num'],count($_config['hostname'])-1)); }
}
}else{
$r = floor(mt_rand(0,count($_config['hostname'])-1)); }
$db_config = array(
'username' => isset($_config['username'][$r])?$_config['username'][$r]:$_config['username'][0],
'password' => isset($_config['password'][$r])?$_config['password'][$r]:$_config['password'][0],
'hostname' => isset($_config['hostname'][$r])?$_config['hostname'][$r]:$_config['hostname'][0],
'hostport' => isset($_config['hostport'][$r])?$_config['hostport'][$r]:$_config['hostport'][0],
'database' => isset($_config['database'][$r])?$_config['database'][$r]:$_config['database'][0],
'dsn' => isset($_config['dsn'][$r])?$_config['dsn'][$r]:$_config['dsn'][0],
'charset' => isset($_config['charset'][$r])?$_config['charset'][$r]:$_config['charset'][0],
);
return $this->connect($db_config,$r);
}
public function __destruct() {
if ($this->PDOStatement){
$this->free();
}
$this->close();
}
}