数据库连接类 DB.class.php
<?php /** * 数据库操作类 */ class DB { private $link_id; private $handle; //日志文件句柄 private $is_log; private $time; public function __construct() { header("Content-type: text/html; charset=utf-8"); $this->time = $this->microtime_float(); require_once 'configs/config.db.php'; $this->connect($db_config["hostname"], $db_config["username"], $db_config["password"], $db_config["database"], $db_config["pconnect"]); $this->is_log = $db_config["log"]; if($this->is_log){ $this->handle = fopen($db_config["logfilepath"] . "dblog.txt", "a+"); } } /** * 连接数据库 */ public function connect($dbhost, $dbuser, $dbpw, $dbname, $pconnect = 0, $charset ='utf8') { if($pconnect == 0){ $this->link_id = mysql_connect($dbhost, $dbuser, $dbpw, true); if(!$this->link_id){ $this->halt("数据库连接失败"); } }else{ $this->link_id = mysql_pconnect($dbhost, $dbuser, $dbpw); if(!$this->link_id){ $this->halt("数据库长连接失败"); } } if(!mysql_select_db($dbname, $this->link_id)){ $this->halt("数据库选择失败"); } mysql_query("set names " . $charset); } /** * 查询 * Enter description here ... * @param unknown_type $sql */ public function query($sql){ $this->write_log("查询 " . $sql); $query = mysql_query($sql, $this->link_id); if(!$query){ $this->halt("查询失败 " . $sql); } return $query; } /** * 获取一条记录（MYSQL_ASSOC，MYSQL_NUM，MYSQL_BOTH） * Enter description here ... * @param $sql */ public function get_one($sql, $result_type = MYSQL_ASSOC){ $query = $this->query($sql); $rt = mysql_fetch_array($query, $result_type); $this->write_log("获取一条记录 " . $sql); return $rt; } /** * 获取全部记录 * Enter description here ... * @param unknown_type $sql * @param unknown_type $result_type */ public function get_all($sql, $is_page = false, $page_num = 10, $result_type = MYSQL_ASSOC){ if(!$is_page){ $query = $this->query($sql); $i = 0; $rt = array(); while ($row = mysql_fetch_array($query, $result_type)) { $rt[$i++] = $row; } $this->write_log("获取全部记录（无翻页）" . $sql); }else{ $rt = $this->page($sql, $page_num, $result_type); } return $rt; } /** * 获取全部数据（带翻页） * Enter description here ... * @param $sql sql语句 * @param $page_num 每页显示记录条数 */ public function page($sql, $page_num, $result_type){ session_start(); $query = $this->query($sql); $all_num = mysql_num_rows($query); //总条数 $page_all_num = ceil($all_num / $page_num); //总页数 $page = empty($_GET['page']) ? 1 : $_GET['page']; //当前页数 $page = (int)$page; //安全强制转换 $limit_str = ($page - 1) * $page_num; //记录起始数 $sql .= " limit $limit_str, $page_num"; $query = $this->query($sql); $i = 0; $rt = array(); while ($row = mysql_fetch_array($query, $result_type)) { $rt[$i++] = $row; } $this->write_log("获取翻页记录（带翻页）" . $sql); $_SESSION["page_all_num"] = $page_all_num; $_SESSION["next"] = $page >= $page_all_num ? $page_all_num : $page + 1; $_SESSION["pre"] = $page <= 1 ? 1 : $page - 1; return $rt; } /** * 插入 * Enter description here ... * @param unknown_type $table * @param unknown_type $dataArray */ public function insert($table,$dataArray) { $field = ""; $value = ""; if( !is_array($dataArray) || count($dataArray) <= 0) { $this->halt('没有要插入的数据'); return false; } foreach ($dataArray as $key => $val){ $field .="$key,"; $value .="'$val',"; } $field = substr( $field,0,-1); $value = substr( $value,0,-1); $sql = "insert into $table($field) values($value)"; $this->write_log("插入 ".$sql); if(!$this->query($sql)) return false; return true; } /** * 更新 * Enter description here ... * @param unknown_type $table * @param unknown_type $dataArray * @param unknown_type $condition */ public function update( $table,$dataArray,$condition="") { if( !is_array($dataArray) || count($dataArray)<=0) { $this->halt('没有要更新的数据'); return false; } $value = ""; while( list($key,$val) = each($dataArray)) $value .= "$key = '$val',"; $value .= substr( $value,0,-1); $sql = "update $table set $value where 1=1 and $condition"; $this->write_log("更新 ".$sql); if(!$this->query($sql)) return false; return true; } /** * 删除 * Enter description here ... * @param unknown_type $table * @param unknown_type $condition */ public function delete( $table,$condition="") { if( empty($condition) ) { $this->halt('没有设置删除的条件'); return false; } $sql = "delete from $table where 1=1 and $condition"; $this->write_log("删除 ".$sql); if(!$this->query($sql)) return false; return true; } /** * 返回结果集 * Enter description here ... * @param unknown_type $query * @param unknown_type $result_type */ public function fetch_array($query, $result_type = MYSQL_ASSOC){ $this->write_log("返回结果集"); return mysql_fetch_array($query, $result_type); } /** * 获取记录条数 * Enter description here ... * @param unknown_type $results */ public function num_rows($results) { if(!is_bool($results)) { $num = mysql_num_rows($results); $this->write_log("获取的记录条数为".$num); return $num; } else { return 0; } } /** * 获取最后插入的id * Enter description here ... */ public function insert_id() { $id = mysql_insert_id($this->link_id); $this->write_log("最后插入的id为".$id); return $id; } /** * 关闭数据库连接 * Enter description here ... */ public function close() { $this->write_log("已关闭数据库连接"); return @mysql_close($this->link_id); } /** * 错误提示 */ private function halt($msg = ''){ $msg .= "\r\n" . mysql_error(); $this->write_log($msg); die($msg); } /** * 写入日志文件 */ public function write_log($msg = ''){ if($this->is_log){ $text = date("Y-m-d H:i:s") . " " . $msg . "\r\n"; fwrite($this->handle, $text); } } /** * 获得毫秒数 */ public function microtime_float() { list($usec, $sec) = explode(" ", microtime()); return ((float)$usec + (float)$sec); } /** * 析构函数 * Enter description here ... */ public function __destruct(){ $use_time = ($this->microtime_float()) - ($this->time); $this->write_log("完成整个查询任务，所用时间为 " . $use_time); if($this->is_log){ fclose($this->handle); } } } ?>
config.db.php配置文件
<?php $db_config = array ( 'hostname' => 'localhost', 'username' => 'root', 'password' => '123456', 'database' => 'child_games', 'charset' => 'utf8', 'pconnect' => 0, //是否使用持久连接(0关/1开) 'log' => 1, //是否开启日志(0关/1开) 'logfilepath' => './' //日志文件目录 ); ?>
