PHP以mysqli方式连接类完整代码实例


Posted in PHP onJuly 15, 2014

本文所述的是一个在PHP中以mysqli方式连接数据库的一个数据库类实例,该数据库类是从一个PHP的CMS中整理出来的,可实现PHP连接数据库类,MySQLi版,兼容PHP4,对于有针对性需要的朋友可根据此代码进行优化和修改。

<?php
#==================================================================================================
# Filename: /db/db_mysqli.php
# Note : 连接数据库类,MySQLi版
#==================================================================================================
#[类库sql]
class db_mysqli
{
 var $query_count = 0;
 var $host;
 var $user;
 var $pass;
 var $data;
 var $conn;
 var $result;
 var $prefix = "qinggan_";
 //返回结果集类型,默认是数字+字符
 var $rs_type = MYSQLI_ASSOC;
 var $query_times = 0;#[查询时间]
 var $conn_times = 0;#[连接数据库时间]
 var $unbuffered = false;
 //定义查询列表
 var $querylist;
 var $debug = false;
 #[构造函数]
 function __construct($config=array())
 {
 $this->host = $config['host'] ? $config['host'] : 'localhost';
 $this->port = $config['port'] ? $config['port'] : '3306';
 $this->user = $config['user'] ? $config['user'] : 'root';
 $this->pass = $config['pass'] ? $config['pass'] : '';
 $this->data = $config['data'] ? $config['data'] : '';
 $this->debug = $config["debug"] ? $config["debug"] : false;
 $this->prefix = $config['prefix'] ? $config['prefix'] : 'qinggan_';
 if($this->data)
 {
  $ifconnect = $this->connect($this->data);
  if(!$ifconnect)
  {
  $this->conn = false;
  return false;
  }
 }
 return true;
 }
 #[兼容PHP4]
 function db_mysqli($config=array())
 {
 return $this->__construct($config);
 }
 #[连接数据库]
 function connect($database="")
 {
 $start_time = $this->time_used();
 if(!$this->port) $this->port = "3306";
 $this->conn = @mysqli_connect($this->host,$this->user,$this->pass,"",$this->port) or false;
 if(!$this->conn)
 {
  return false;
 }
 $version = $this->get_version();
 if($version>"4.1")
 {
  mysqli_query($this->conn,"SET NAMES 'utf8'");
  if($version>"5.0.1")
  {
  mysqli_query($this->conn,"SET sql_mode=''");
  }
 }
 $end_time = $this->time_used();
 $this->conn_times += round($end_time - $start_time,5);#[连接数据库的时间]
 $ifok = $this->select_db($database);
 return $ifok ? true : false;
 }
 function select_db($data="")
 {
 $database = $data ? $data : $this->data;
 if(!$database)
 {
  return false;
 }
 $this->data = $database;
 $start_time = $this->time_used();
 $ifok = mysqli_select_db($this->conn,$database);
 if(!$ifok)
 {
  return false;
 }
 $end_time = $this->time_used();
 $this->conn_times += round($end_time - $start_time,5);#[连接数据库的时间]
 return true;
 }
 #[关闭数据库连接,当您使用持续连接时该功能失效]
 function close()
 {
 if(is_resource($this->conn))
 {
  return mysqli_close($this->conn);
 }
 else
 {
  return true;
 }
 }
 function __destruct()
 {
 return $this->close();
 }
 function set($name,$value)
 {
 if($name == "rs_type")
 {
  $value = strtolower($value) == "num" ? MYSQLI_NUM : MYSQLI_ASSOC;
 }
 $this->$name = $value;
 }
 function query($sql)
 {
 if(!is_resource($this->conn))
 {
  $this->connect();
 }
 else
 {
  if(!mysql_ping($this->conn))
  {
   $this->close();
   $this->connect();
  }
 }
 if($this->debug)
 {
  $sqlkey = md5($sql);
  if($this->querylist)
  {
  $qlist = array_keys($this->querylist);
  if(in_array($sqlkey,$qlist))
  {
   $count = $this->querylist[$sqlkey]["count"] + 1;
   $this->querylist[$sqlkey] = array("sql"=>$sql,"count"=>$count);
  }else{
   $this->querylist[$sqlkey] = array("sql"=>$sql,"count"=>1);
  }
  }
  else{
  $this->querylist[$sqlkey] = array("sql"=>$sql,"count"=>1);
  }
 }
 $start_time = $this->time_used();
 $func = $this->unbuffered && function_exists("mysqli_multi_query") ? "mysqli_multi_query" : "mysqli_query";
 $this->result = @$func($this->conn,$sql);
 $this->query_count++;
 $end_time = $this->time_used();
 $this->query_times += round($end_time - $start_time,5);#[查询时间]
 if(!$this->result)
 {
  return false;
 }
 return $this->result;
 }
 function get_all($sql="",$primary="")
 {
 $result = $sql ? $this->query($sql) : $this->result;
 if(!$result)
 {
  return false;
 }
 $start_time = $this->time_used();
 $rs = array();
 $is_rs = false;
 while($rows = mysqli_fetch_array($result,$this->rs_type))
 {
  if($primary && $rows[$primary])
  {
  $rs[$rows[$primary]] = $rows;
  }
  else
  {
  $rs[] = $rows;
  }
  $is_rs = true;
 }
 $end_time = $this->time_used();
 $this->query_times += round($end_time - $start_time,5);#[查询时间]
 return ($is_rs ? $rs : false);
 }
 function get_one($sql="")
 {
 $start_time = $this->time_used();
 $result = $sql ? $this->query($sql) : $this->result;
 if(!$result)
 {
  return false;
 }
 $rows = mysqli_fetch_array($result,$this->rs_type);
 $end_time = $this->time_used();
 $this->query_times += round($end_time - $start_time,5);#[查询时间]
 return $rows;
 }
 function insert_id($sql="")
 {
 if($sql)
 {
  $rs = $this->get_one($sql);
  return $rs;
 }
 else
 {
  return mysqli_insert_id($this->conn);
 }
 }
 function insert($sql)
 {
 $this->result = $this->query($sql);
 $id = $this->insert_id();
 return $id;
 }
 function all_array($table,$condition="",$orderby="")
 {
 if(!$table)
 {
  return false;
 }
 $table = $this->prefix.$table;
 $sql = "SELECT * FROM ".$table;
 if($condition && is_array($condition) && count($condition)>0)
 {
  $sql_fields = array();
  foreach($condition AS $key=>$value)
  {
  $sql_fields[] = "`".$key."`='".$value."' ";
  }
  $sql .= " WHERE ".implode(" AND ",$sql_fields);
 }
 if($orderby)
 {
  $sql .= " ORDER BY ".$orderby;
 }
 $rslist = $this->get_all($sql);
 return $rslist;
 }
 function one_array($table,$condition="")
 {
 if(!$table)
 {
  return false;
 }
 $table = $this->prefix.$table;
 $sql = "SELECT * FROM ".$table;
 if($condition && is_array($condition) && count($condition)>0)
 {
  $sql_fields = array();
  foreach($condition AS $key=>$value)
  {
  $sql_fields[] = "`".$key."`='".$value."' ";
  }
  $sql .= " WHERE ".implode(" AND ",$sql_fields);
 }
 $rslist = $this->get_one($sql);
 return $rslist;
 }
 //将数组写入数据中
 function insert_array($data,$table,$insert_type="insert")
 {
 if(!$table || !is_array($data) || !$data)
 {
  return false;
 }
 $table = $this->prefix.$table;//自动增加表前缀
 if($insert_type == "insert")
 {
  $sql = "INSERT INTO ".$table;
 }
 else
 {
  $sql = "REPLACE INTO ".$table;
 }
 $sql_fields = array();
 $sql_val = array();
 foreach($data AS $key=>$value)
 {
  $sql_fields[] = "`".$key."`";
  $sql_val[] = "'".$value."'";
 }
 $sql.= "(".(implode(",",$sql_fields)).") VALUES(".(implode(",",$sql_val)).")";
 return $this->insert($sql);
 }
 //更新数据
 function update_array($data,$table,$condition)
 {
 if(!$data || !$table || !$condition || !is_array($data) || !is_array($condition))
 {
  return false;
 }
 $table = $this->prefix.$table;//自动增加表前缀
 $sql = "UPDATE ".$table." SET ";
 $sql_fields = array();
 foreach($data AS $key=>$value)
 {
  $sql_fields[] = "`".$key."`='".$value."'";
 }
 $sql.= implode(",",$sql_fields);
 $sql_fields = array();
 foreach($condition AS $key=>$value)
 {
  $sql_fields[] = "`".$key."`='".$value."' ";
 }
 $sql .= " WHERE ".implode(" AND ",$sql_fields);
 return $this->query($sql);
 }
 function count($sql="")
 {
 if($sql)
 {
  $this->rs_type = MYSQLI_NUM;
  $this->query($sql);
  $rs = $this->get_one();
  $this->rs_type = MYSQLI_ASSOC;
  return $rs[0];
 }
 else
 {
  return mysqli_num_rows($this->result);
 }
 }
 function num_fields($sql="")
 {
 if($sql)
 {
  $this->query($sql);
 }
 return mysqli_num_fields($this->result);
 }
 function list_fields($table)
 {
 $rs = $this->get_all("SHOW COLUMNS FROM ".$table);
 if(!$rs)
 {
  return false;
 }
 foreach($rs AS $key=>$value)
 {
  $rslist[] = $value["Field"];
 }
 return $rslist;
 }
 #[显示表名]
 function list_tables()
 {
 $rs = $this->get_all("SHOW TABLES");
 return $rs;
 }
 function table_name($table_list,$i)
 {
 return $table_list[$i];
 }
 function escape_string($char)
 {
 if(!$char)
 {
  return false;
 }
 return mysqli_escape_string($this->conn,$char);
 }
 function get_version()
 {
 return mysqli_get_server_info($this->conn);
 }
 function time_used()
 {
 $time = explode(" ",microtime());
 $used_time = $time[0] + $time[1];
 return $used_time;
 }
 //Mysql的查询时间
 function conn_times()
 {
 return $this->conn_times + $this->query_times;
 }
 //MySQL查询资料
 function conn_count()
 {
 return $this->query_count;
 }
 # 高效SQL生成查询,仅适合单表查询
 function phpok_one($tbl,$condition="",$fields="*")
 {
 $sql = "SELECT ".$fields." FROM ".$this->db->prefix.$tbl;
 if($condition)
 {
  $sql .= " WHERE ".$condition;
 }
 return $this->get_one($sql);
 }
 function debug()
 {
 if(!$this->querylist || !is_array($this->querylist) || count($this->querylist) < 1)
 {
  return false;
 }
 $html = '<table cellpadding="0" cellspacing="0" width="100%" bgcolor="#CECECE"><tr><td>';
 $html.= '<table cellpadding="1" cellspacing="1" width="100%">';
 $html.= '<tr><th bgcolor="#EFEFEF" height="30px">SQL</th><th bgcolor="#EFEFEF" width="80px">查询</th></tr>';
 foreach($this->querylist AS $key=>$value)
 {
  $html .= '<tr><td bgcolor="#FFFFFF"><div style="padding:3px;color:#6E6E6E;">'.$value['sql'].'</div></td>';
  $html .= '<td align="center" bgcolor="#FFFFFF"><div style="padding:3px;color:#000000;">'.$value["count"].'</div></td></tr>';
 }
 $html.= "</table>";
 $html.= "</td></tr></table>";
 return $html;
 }
 function conn_status()
 {
 if(!$this->conn) return false;
 return true;
 }
}
?>
PHP 相关文章推荐
十天学会php之第八天
Oct 09 PHP
php模板之Phpbean的目录结构
Jan 10 PHP
php下获取客户端ip地址的函数
Mar 15 PHP
PHP 5.3 下载时 VC9、VC6、Thread Safe、Non Thread Safe的区别分析
Mar 28 PHP
php中经典方法实现判断多维数组是否为空
Oct 23 PHP
php判断两个日期之间相差多少个月份的方法
Jun 18 PHP
对比分析php中Cookie与Session的异同
Feb 19 PHP
php rmdir使用递归函数删除非空目录实例详解
Oct 20 PHP
php读取qqwry.dat ip地址定位文件的类实例代码
Nov 15 PHP
php获取目录中所有文件名及判断文件与目录的简单方法
Mar 04 PHP
php实现的统计字数函数定义与使用示例
Jul 26 PHP
PHP数据库操作二:memcache用法分析
Aug 16 PHP
destoon实现底部添加你是第几位访问者的方法
Jul 15 #PHP
destoon实现调用热门关键字的方法
Jul 15 #PHP
destoon实现资讯信息前面调用它所属分类的方法
Jul 15 #PHP
destoon实现首页显示供应、企业、资讯条数的方法
Jul 15 #PHP
destoon实现公司新闻详细页添加评论功能的方法
Jul 15 #PHP
destoon数据库表说明汇总
Jul 15 #PHP
PHP+Mysql树型结构(无限分类)数据库设计的2种方式实例
Jul 15 #PHP
You might like
对text数据类型不支持代码页转换 从: 1252 到: 936
2011/04/23 PHP
解析php session_set_save_handler 函数的用法(mysql)
2013/06/29 PHP
php json与xml序列化/反序列化
2013/10/28 PHP
PHP中ID设置自增后不连续的原因分析及解决办法
2016/08/21 PHP
几个javascript操作word的参考代码
2009/10/26 Javascript
用jquery与css打造个性化的单选框和复选框
2010/10/20 Javascript
JS 对输入框进行限制(常用的都有)
2013/07/30 Javascript
JavaScript数字和字符串转换示例
2014/03/26 Javascript
js数值计算时使用parseInt进行数据类型转换(jquery)
2014/10/07 Javascript
JavaScript中的索引数组、关联数组和静态数组、动态数组讲解
2014/11/08 Javascript
javascript实现动态改变层大小的方法
2015/05/14 Javascript
深入分析jsonp协议原理
2015/09/26 Javascript
js实现把图片的绝对路径转为base64字符串、blob对象再上传
2016/12/29 Javascript
jquery实现刷新随机变化样式特效(tag标签样式)
2017/02/03 Javascript
基于Vue实现页面切换左右滑动效果
2020/06/29 Javascript
微信小程序url与token设置详解
2017/09/26 Javascript
vue2里面ref的具体使用方法
2017/10/27 Javascript
使用DataTable插件实现异步加载数据
2017/11/19 Javascript
vue如何判断dom的class
2018/04/26 Javascript
修改node.js默认的npm安装目录实例
2018/05/15 Javascript
mpvue小程序仿qq左滑置顶删除组件
2018/08/03 Javascript
JavaScript学习笔记之基于定时器实现图片无缝滚动功能详解
2019/01/09 Javascript
js实现点赞效果
2020/03/16 Javascript
前端vue+elementUI如何实现记住密码功能
2020/09/20 Javascript
跟老齐学Python之有容乃大的list(2)
2014/09/15 Python
解决python "No module named pip" 的问题
2018/10/13 Python
Python实现定期检查源目录与备份目录的差异并进行备份功能示例
2019/02/27 Python
python使用 zip 同时迭代多个序列示例
2019/07/06 Python
HTML5 Convas APIs方法详解
2015/04/24 HTML / CSS
统计学专业毕业生的自我评价分享
2013/11/28 职场文书
医学实习生自我鉴定
2013/12/12 职场文书
函授本科自我鉴定
2014/02/04 职场文书
活动策划邀请函
2014/02/06 职场文书
班主任个人工作反思
2014/04/28 职场文书
讲解员培训方案
2014/05/04 职场文书
毕业典礼致辞
2015/07/29 职场文书