封装的mysql类代码,PHP代码库,德仔网

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【PHP】封装的mysql类
作者:灏明 / 发布于2014/12/10/ 504

	<?php
	/**
	*@create 2014-11-05
	*@author JustPHP
	*@description mysql工具类
	**/
	
	class DB
	{
	 private $host = 'localhost';
	
	 private $user = 'root';
	
	 private $pwd = 'root';
	
	 private $port = '3306';
	
	 private $dbname = 'test';
	
	 private $resource = null;
	
	 private static $handle = null;
	
	 private static $isConnect = false;
	
	
	 private function __construct($server)
	 {
	 $this->host = $server['host'];
	 $this->user = $server['user'];
	 $this->pwd = $server['pwd'];
	 $this->port = $server['port'];
	 $this->dbname = $server['dbname'];
	
	 $this->connect();
	
	 }//End of function
	
	
	 public static function getInstance($server)
	 {
	 if( self::$isConnect ) {
	 return self::$handle;
	 }
	
	 self::$handle = new self($server);
	 self::$isConnect = true;
	
	 return self::$handle;
	 }//End of funtion
	
	
	 private function connect()
	 {
	 $this->resource = mysql_connect($this->host.':'.$this->port,
	 $this->user,
	 $this->pwd
	 ) or $this->error("connect fail");
	
	 mysql_select_db($this->dbname, $this->resource);
	
	 return true;
	 }
	
	
	 private function getSql($sql)
	 {
	 $operate = array('insert', 'delete', 'update', 'select', 'create');
	 return $sql;
	 }
	
	
	 public function query($sql)
	 {
	 $sql = $this->getSql($sql);
	 mysql_query("SET NAMES UTF8");
	 $query_result = mysql_query($sql, $this->resource) or $this->error("query fail");
	
	 return $query_result;
	 }
	
	
	 public function getQueryResult($sql)
	 {
	 $query_result = $this->query($sql);
	
	 $result = array();
	 if( !$query_result ) {
	 return $result;
	 }
	
	 while ( $row = mysql_fetch_assoc($query_result) ) {
	 $result[] = $row;
	 }
	 $result['rows'] = mysql_num_rows($query_result);
	 $query_result = null;
	
	 return $result;
	 }
	
	
	 public function getInsertResult($sql)
	 {
	 $query_result = $this->query($sql);
	
	 if( !$query_result ) {
	 return false;
	 }
	
	 return mysql_insert_id($this->resource);
	 }
	
	
	 public function getUpdateResult($sql)
	 {
	
	 $query_result = $this->query($sql);
	
	 if( !$query_result ) {
	 return false;
	 }
	
	 return mysql_affected_rows($this->resource);
	 }
	
	
	 public function getDeleteResult($sql)
	 {
	 return $this->getUpdateResult($sql);
	 }
	
	
	 public function close_connect()
	 {
	 self::$handle = null;
	 self::$isConnect = false;
	 mysql_free_result($this->resource);
	 $this->resource = null;
	 }
	
	
	 private function error($msg='')
	 {
	 $msg = "$msg--->>".mysql_error();
	 die($msg);
	 }
	
	}//End of class
	
	
	?>

	

	<?php
	 /**+---------------------------------
	 *@create 2014-11-13
	 *@author JustPhp
	 *@description DB数据整理类
	 **+--------------------------------*/
	 class DbTool
	 {
	 private $primary_key = 'id';
	
	 public function __construct($primary_key=null) {
	 if( !empty($primary_key) ) {
	 $this->primary_key = $primary_key;
	 }
	 }
	
	 public function getInsertSql($data, $table) {
	 $sql = $key_str = $value_str = "";
	 foreach($data as $key=>$value) {
	 $key_str .= "{$key}, ";
	 $value_str .= "'{$value}', ";
	 }
	 $key_str = trim($key_str, ', ');
	 $value_str = trim($value_str, ', ');
	 $sql = "INSERT INTO {$table}({$key_str}) VALUES({$value_str})";
	 $data=null; $key_str=null; $value_str=null;
	
	 return $sql;
	 }
	
	
	 public function getUpdateSql($data, $table) {
	 $pk = $this->primary_key;
	 $id = $data[$pk]; unset($data[$pk]);
	 $sql = $key_value = "";
	 foreach($data as $key=>$value) {
	 $key_value .= "{$key}='{$value}', ";
	 }
	 $key_value = trim($key_value, ', ');
	 $sql = "UPDATE {$table} SET {$key_value} WHERE $pk='{$id}'";
	 $data=null; $key_value=null;
	
	 return $sql;
	 }
	
	
	 public function getQuerySql($condition, $table) {
	 $field = empty($condition['field']) ? '*': $condition['field'];
	 $sql = "SELECT {$field} FROM {$table} ";
	 if( isset($condition['where']) ) {
	 $sql .= "WHERE {$condition['where']} ";
	 }
	 if( isset($condition['groupby']) ) {
	 $sql .= "GROUP BY {$condition['groupby']} ";
	 }
	 if( isset($condition['orderby']) ) {
	 $sql .= "ORDER BY {$condition['orderby']} ";
	 }
	 if( isset($condition['limit']) ) {
	 $sql .= "LIMIT {$condition['limit']} ";
	 }
	 $condition=null;
	
	 return $sql;
	 }
	
	
	
	 public function getDeleteSql($id, $table) {
	
	 $pk = $this->primary_key;
	 $sql = "DELETE FROM {$table} WHERE $pk='{$id}' ";
	 return $sql;
	 }
	
	 }
	
	
	?>
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