ecstore-mysql_connect改写成mysqli_connect

原创 于 2025-07-18 15:31:48 发布 · 91 阅读 · 0 ·
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#php #c语言 #http 

<?php
/**
 * ShopEx licence
 *
 * @copyright  Copyright (c) 2005-2010 ShopEx Technologies Inc. (http://www.shopex.cn)
 * @license  http://ecos.shopex.cn/ ShopEx License
 */

class base_db_connections extends base_db_abstract implements base_interface_db
{
    protected $_rw_lnk = null;
    protected $_ro_lnk = null;
    protected $_use_transaction = false;
    protected $_in_transaction = false;
    public $_enable_innodb = false;

    public function __construct(){
        parent::__construct();
    }

    public function enable_innodb(){
        $status = false;
        $rs = $this->select('SHOW ENGINES');
        foreach($rs as $row){
            if($row['Engine'] == 'InnoDB' && ($row['Support'] == 'YES' || $row['Support'] == 'DEFAULT') ){
                $status = true;
            }
        }
        return $this->_enable_innodb = $status;
    }

    public function exec($sql, $skipModifiedMark=false, $db_lnk=null){
        if($this->prefix != 'sdb_'){
            $sql = preg_replace_callback('/([`\s\(,])(sdb_)([0-9a-z\_]+)([`\s\.]{0,1})/is', array($this, 'fix_dbprefix'), $sql);
        }

        if(!$skipModifiedMark && !defined('DB_CACHE') && cachemgr::enable() && preg_match('/(?:(delete\s+from)|(insert\s+into)|(update))\s+([]0-9a-z_:"`.@[-]*)/is', $sql, $match)){
            $table = strtoupper(trim(str_replace(array('`','"','\''), '', $match[4])));
            $now = time();
            $pos = strpos($table, strtoupper($this->prefix));
            if($pos === 0){
                $table = substr($table, strlen($this->prefix));
            }
            if(defined('BASE_CACHE_EXPIRES')){
                preg_match("/([A-Z]*)_/", $table, $m);
                $app_id = strtolower($m[1]);
                $array = array('expire'=>$now, 'type'=>'DB', 'name'=>$table, 'app'=>$app_id);
                base_kvstore::instance('cache/cache_expires')->store($table, $array);
                cachemgr::set_modified('DB', $table, $now);
            } else {
                $this->exec('UPDATE sdb_base_cache_expires SET expire = "' . $now . '" WHERE type = "DB" AND name = "' . $table . '"', true);
                if($this->affect_row()){
                    cachemgr::set_modified('DB', $table, $now);
                }
            }
        }

        if(!is_resource($db_lnk) && !($db_lnk instanceof mysqli)){
            if($this->_rw_lnk){
                $db_lnk = $this->_rw_lnk;
            } else {
                $db_lnk = $this->_rw_conn();
            }
        }

        if(defined("STRESS_TESTING")){
            b2c_forStressTest::$sqlAmount++;
            b2c_forStressTest::slowSqlStart();
        }

        // mysqli_query 参数顺序：连接, sql
        if($rs = mysqli_query($db_lnk, $sql)){
            if(defined("STRESS_TESTING")){
                b2c_forStressTest::slowSqlEnd($sql);
            }
            self::$mysql_query_executions++;
            logger::debug('sql:'.self::$mysql_query_executions.'.'.$sql);
            $db_result = array('rs' => $rs, 'sql' => $sql);
            return $db_result;
        } else {
            logger::error($sql.':'.mysqli_error($db_lnk));
            trigger_error($sql.':'.mysqli_error($db_lnk), E_USER_WARNING);
            return false;
        }
    }

    protected function fix_dbprefix($matches)
    {
        return $matches[1] . ((trim($matches[1])=='`') ? $this->prefix.$matches[3] : '`'.$this->prefix.$matches[3].'`') . $matches[4];
    }

    public function select($sql, $skipModifiedMark=false){
        if($this->_rw_lnk){
            $db_lnk = $this->_rw_lnk;
        } else if($this->_ro_lnk){
            $db_lnk = $this->_ro_lnk;
        } else {
            $db_lnk = $this->_ro_conn();
        }

        if($this->prefix != 'sdb_'){
            $sql = preg_replace_callback('/([`\s\(,])(sdb_)([0-9a-z\_]+)([`\s\.]{0,1})/is', array($this, 'fix_dbprefix'), $sql);
        }

        if(cachemgr::enable() && cachemgr::check_current_co_depth() > 0 && preg_match_all('/FROM\s+([]0-9a-z_:"`.@[-]*)/is', $sql, $matches)){
            if(isset($matches[1])){
                foreach($matches[1] as $table){
                    if(empty($table)) continue;
                    $table = strtoupper(trim(str_replace(array('`','"','\''), '', $table)));
                    $pos = strpos($table, strtoupper($this->prefix));
                    if($pos === 0){
                        $table = substr($table, strlen($this->prefix));
                    }
                    if(!cachemgr::check_current_co_objects_exists('DB', $table)){
                        cachemgr::check_expires('DB', $table);
                    }
                }
            }
        }

        $rs = $this->exec($sql, $skipModifiedMark, $db_lnk);
        if($rs && $rs['rs']){
            $data = array();
            while($row = mysqli_fetch_assoc($rs['rs'])){
                $data[] = $row;
            }
            mysqli_free_result($rs['rs']);
            return $data;
        } else {
            return false;
        }
    }

    public function selectrow($sql){
        $row = $this->selectlimit($sql, 1, 0);
        return isset($row[0]) ? $row[0] : false;
    }

    public function selectlimit($sql, $limit=10, $offset=0){
        if($offset >= 0 && $limit >= 0){
            $offset = $offset >= 0 ? intval($offset) . ',' : '';
            $limit = $limit >= 0 ? intval($limit) : '18446744073709551615';
            $sql .= ' LIMIT ' . $offset . ' ' . $limit;
        }
        $data = $this->select($sql);
        return $data;
    }

    protected function _ro_conn(){
        if(defined('DB_SLAVE_HOST') && $this->_use_transaction !== true){
            $this->_ro_lnk = $this->_connect(DB_SLAVE_HOST, DB_SLAVE_USER, DB_SLAVE_PASSWORD, DB_SLAVE_NAME);
        } elseif($this->_rw_lnk){
            $this->_ro_lnk = $this->_rw_lnk;
        } else {
            $this->_ro_lnk = $this->_rw_conn();
        }
        return $this->_ro_lnk;
    }

    public function getRows($rs, $row=10){
        $i = 0;
        $data = array();
        while(($r = mysqli_fetch_assoc($rs['rs'])) && $i++ < $row){
            $data[] = $r;
        }
        return $data;
    }

    protected function _rw_conn(){
        $this->_rw_lnk = $this->_connect(DB_HOST, DB_USER, DB_PASSWORD, DB_NAME);
        return $this->_rw_lnk;
    }

    protected function _connect($host, $user, $passwd, $dbname){
        if(defined('DB_PCONNECT') && constant('DB_PCONNECT')){
            // mysqli 没有持久连接函数，推荐用普通连接
            $lnk = mysqli_connect($host, $user, $passwd);
        } else {
            $lnk = @mysqli_connect($host, $user, $passwd);
        }

        if(!$lnk && kernel::is_online()){
            trigger_error(app::get('base')->_('无法连接数据库:').mysqli_connect_error(), E_USER_ERROR);
        }

        if(!mysqli_select_db($lnk, $dbname)){
            trigger_error('Cannot select database '.$dbname.': '.mysqli_error($lnk), E_USER_ERROR);
        }

        $dbver = mysqli_get_server_info($lnk);
        if(preg_match('/[0-9\.]+/', $dbver, $match)){
            $dbverNum = $match[0];
            if(version_compare($dbverNum, '4.1.1', '<')){
                define('DB_OLDVERSION', 1);
                $this->dbver = 3;
            } else {
                if(defined('DB_CHARSET') && constant('DB_CHARSET')){
                    mysqli_query($lnk, 'SET NAMES \'' . DB_CHARSET . '\'');
                }
                if(!version_compare($dbverNum, '6', '<')){
                    $this->dbver = 6;
                }
            }
        }
        return $lnk;
    }

    public function count($sql) {
        $sql = preg_replace(array(
            '/(.*\s)LIMIT .*/i',
            '/^select\s+(.+?)\bfrom\b/is'
        ), array(
            '\\1',
            'select count(*) as c from'
        ), trim($sql));

        $row = $this->select($sql);
        return isset($row[0]['c']) ? intval($row[0]['c']) : 0;
    }

    protected function _whereClause($queryString){
        preg_match('/\sWHERE\s(.*)/is', $queryString, $whereClause);

        $discard = false;
        if ($whereClause) {
            if (preg_match('/\s(ORDER\s.*)/is', $whereClause[1], $discard));
            else if (preg_match('/\s(LIMIT\s.*)/is', $whereClause[1], $discard));
            else preg_match('/\s(FOR UPDATE.*)/is', $whereClause[1], $discard);
        } else
            $whereClause = array(false,false);

        if ($discard)
            $whereClause[1] = substr($whereClause[1], 0, strlen($whereClause[1]) - strlen($discard[1]));

        return $whereClause[1];
    }

    public function quote($string){
        if($this->_rw_lnk){
            $result = mysqli_real_escape_string($this->_rw_lnk, $string);
        } else {
            // 这里没有数据库连接时，降级用 addslashes
            $result = addslashes($string);
        }
        return "'".$result."'";
    }

    public function lastinsertid(){
        $sql = 'SELECT LAST_INSERT_ID() AS lastinsertid';
        $rs = $this->exec($sql, true, $this->_rw_lnk);
        if($rs && $rs['rs']){
            $row = mysqli_fetch_assoc($rs['rs']);
            mysqli_free_result($rs['rs']);
            return $row['lastinsertid'];
        }
        return 0;
    }

    public function affect_row(){
        if($this->_rw_lnk){
            $db_lnk = $this->_rw_lnk;
        } else if($this->_ro_lnk){
            $db_lnk = $this->_ro_lnk;
        } else {
            return 0;
        }
        return mysqli_affected_rows($db_lnk);
    }

    public function errorinfo(){
        if($this->_rw_lnk){
            $db_lnk = $this->_rw_lnk;
        } else if($this->_ro_lnk){
            $db_lnk = $this->_ro_lnk;
        } else {
            return '';
        }
        return mysqli_error($db_lnk);
    }

    public function errorcode()
    {
        if($this->_rw_lnk){
            $db_lnk = $this->_rw_lnk;
        } else if($this->_ro_lnk){
            $db_lnk = $this->_ro_lnk;
        } else {
            return 0;
        }
        return mysqli_errno($db_lnk);
    }

    public function beginTransaction(){
        if(!$this->_in_transaction){
            $this->_in_transaction = true;
            if(!$this->_use_transaction){
                $this->_use_transaction = true;
                if(isset($this->_ro_lnk)){
                    $this->_ro_conn();
                }
            }
            return $this->exec('START TRANSACTION');
        } else {
            return false;
        }
    }

    public function commit($status=true){
        if($status){
            $this->exec('COMMIT');
            $this->_in_transaction = false;
            return true;
        }
        return false;
    }

    public function rollBack(){
        $this->exec('ROLLBACK');
        $this->_in_transaction = false;
    }

    public function close(){
        if($this->_rw_lnk && mysqli_close($this->_rw_lnk)){
            $this->_rw_lnk = null;
            return true;
        }
        return false;
    }

    public function ping(){
        if($this->_rw_lnk){
            return mysqli_ping($this->_rw_lnk);
        }
        return false;
    }
}

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