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236 lines
8.5 KiB
PHTML
236 lines
8.5 KiB
PHTML
5 years ago
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<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace Think\Db\Driver;
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use Think\Db\Driver;
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/**
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* mysql数据库驱动
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*/
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class Mysql extends Driver{
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/**
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* 解析pdo连接的dsn信息
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* @access public
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* @param array $config 连接信息
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* @return string
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*/
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protected function parseDsn($config){
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$dsn = 'mysql:dbname='.$config['database'].';host='.$config['hostname'];
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if(!empty($config['hostport'])) {
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$dsn .= ';port='.$config['hostport'];
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}elseif(!empty($config['socket'])){
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$dsn .= ';unix_socket='.$config['socket'];
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}
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if(!empty($config['charset'])){
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//为兼容各版本PHP,用两种方式设置编码
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$this->options[\PDO::MYSQL_ATTR_INIT_COMMAND] = 'SET NAMES '.$config['charset'];
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$dsn .= ';charset='.$config['charset'];
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}
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return $dsn;
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}
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/**
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* 取得数据表的字段信息
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* @access public
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*/
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public function getFields($tableName) {
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$this->initConnect(true);
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list($tableName) = explode(' ', $tableName);
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if(strpos($tableName,'.')){
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list($dbName,$tableName) = explode('.',$tableName);
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$sql = 'SHOW COLUMNS FROM `'.$dbName.'`.`'.$tableName.'`';
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}else{
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$sql = 'SHOW COLUMNS FROM `'.$tableName.'`';
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}
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$result = $this->query($sql);
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$info = array();
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if($result) {
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foreach ($result as $key => $val) {
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if(\PDO::CASE_LOWER != $this->_linkID->getAttribute(\PDO::ATTR_CASE)){
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$val = array_change_key_case ( $val , CASE_LOWER );
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}
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$info[$val['field']] = array(
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'name' => $val['field'],
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'type' => $val['type'],
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'notnull' => (bool) ($val['null'] === ''), // not null is empty, null is yes
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'default' => $val['default'],
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'primary' => (strtolower($val['key']) == 'pri'),
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'autoinc' => (strtolower($val['extra']) == 'auto_increment'),
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);
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}
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}
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return $info;
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}
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/**
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* 取得数据库的表信息
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* @access public
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*/
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public function getTables($dbName='') {
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$sql = !empty($dbName)?'SHOW TABLES FROM '.$dbName:'SHOW TABLES ';
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$result = $this->query($sql);
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$info = array();
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foreach ($result as $key => $val) {
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$info[$key] = current($val);
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}
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return $info;
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}
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/**
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* 字段和表名处理
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* @access protected
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* @param string $key
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* @return string
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*/
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protected function parseKey(&$key) {
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$key = trim($key);
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if(!is_numeric($key) && !preg_match('/[,\'\"\*\(\)`.\s]/',$key)) {
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$key = '`'.$key.'`';
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}
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return $key;
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}
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/**
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* 批量插入记录
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* @access public
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* @param mixed $dataSet 数据集
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* @param array $options 参数表达式
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* @param boolean $replace 是否replace
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* @return false | integer
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*/
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public function insertAll($dataSet,$options=array(),$replace=false) {
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$values = array();
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$this->model = $options['model'];
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if(!is_array($dataSet[0])) return false;
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$this->parseBind(!empty($options['bind'])?$options['bind']:array());
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$fields = array_map(array($this,'parseKey'),array_keys($dataSet[0]));
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foreach ($dataSet as $data){
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$value = array();
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foreach ($data as $key=>$val){
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if(is_array($val) && 'exp' == $val[0]){
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$value[] = $val[1];
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}elseif(is_null($val)){
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$value[] = 'NULL';
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}elseif(is_scalar($val)){
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if(0===strpos($val,':') && in_array($val,array_keys($this->bind))){
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$value[] = $this->parseValue($val);
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}else{
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$name = count($this->bind);
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$value[] = ':'.$name;
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$this->bindParam($name,$val);
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}
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}
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}
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$values[] = '('.implode(',', $value).')';
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}
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// 兼容数字传入方式
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$replace= (is_numeric($replace) && $replace>0)?true:$replace;
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$sql = (true===$replace?'REPLACE':'INSERT').' INTO '.$this->parseTable($options['table']).' ('.implode(',', $fields).') VALUES '.implode(',',$values).$this->parseDuplicate($replace);
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$sql .= $this->parseComment(!empty($options['comment'])?$options['comment']:'');
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return $this->execute($sql,!empty($options['fetch_sql']) ? true : false);
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}
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/**
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* ON DUPLICATE KEY UPDATE 分析
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* @access protected
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* @param mixed $duplicate
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* @return string
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*/
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protected function parseDuplicate($duplicate){
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// 布尔值或空则返回空字符串
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if(is_bool($duplicate) || empty($duplicate)) return '';
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if(is_string($duplicate)){
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// field1,field2 转数组
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$duplicate = explode(',', $duplicate);
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}elseif(is_object($duplicate)){
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// 对象转数组
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$duplicate = get_class_vars($duplicate);
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}
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$updates = array();
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foreach((array) $duplicate as $key=>$val){
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if(is_numeric($key)){ // array('field1', 'field2', 'field3') 解析为 ON DUPLICATE KEY UPDATE field1=VALUES(field1), field2=VALUES(field2), field3=VALUES(field3)
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$updates[] = $this->parseKey($val)."=VALUES(".$this->parseKey($val).")";
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}else{
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if(is_scalar($val)) // 兼容标量传值方式
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$val = array('value', $val);
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if(!isset($val[1])) continue;
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switch($val[0]){
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case 'exp': // 表达式
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$updates[] = $this->parseKey($key)."=($val[1])";
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break;
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case 'value': // 值
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default:
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$name = count($this->bind);
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$updates[] = $this->parseKey($key)."=:".$name;
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$this->bindParam($name, $val[1]);
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break;
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}
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}
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}
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if(empty($updates)) return '';
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return " ON DUPLICATE KEY UPDATE ".join(', ', $updates);
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}
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/**
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* 执行存储过程查询 返回多个数据集
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* @access public
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* @param string $str sql指令
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* @param boolean $fetchSql 不执行只是获取SQL
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* @return mixed
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*/
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public function procedure($str,$fetchSql=false) {
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$this->initConnect(false);
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$this->_linkID->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_WARNING);
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if ( !$this->_linkID ) return false;
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$this->queryStr = $str;
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if($fetchSql){
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return $this->queryStr;
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}
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//释放前次的查询结果
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if ( !empty($this->PDOStatement) ) $this->free();
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$this->queryTimes++;
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N('db_query',1); // 兼容代码
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// 调试开始
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$this->debug(true);
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$this->PDOStatement = $this->_linkID->prepare($str);
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if(false === $this->PDOStatement){
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$this->error();
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return false;
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}
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try{
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$result = $this->PDOStatement->execute();
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// 调试结束
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$this->debug(false);
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do
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{
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$result = $this->PDOStatement->fetchAll(\PDO::FETCH_ASSOC);
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if ($result)
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{
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$resultArr[] = $result;
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}
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}
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while ($this->PDOStatement->nextRowset());
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$this->_linkID->setAttribute(\PDO::ATTR_ERRMODE, $this->options[\PDO::ATTR_ERRMODE]);
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return $resultArr;
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}catch (\PDOException $e) {
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$this->error();
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$this->_linkID->setAttribute(\PDO::ATTR_ERRMODE, $this->options[\PDO::ATTR_ERRMODE]);
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return false;
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}
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}
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}
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