<?php

/*

* $Author ：PHPYUN开发团队

*

* 官网: http://www.phpyun.com

*

* 版权所有 2009-2018 宿迁鑫潮信息技术有限公司，并保留所有权利。

*

* 软件声明：未经授权前提下，不得用于商业运营、二次开发以及任何形式的再次发布。

 */







class ucclient_db {

	var $querynum = 0;

	var $link;

	var $histories;



	var $dbhost;

	var $dbuser;

	var $dbpw;

	var $dbcharset;

	var $pconnect;

	var $tablepre;

	var $time;



	var $goneaway = 5;



	function connect($dbhost, $dbuser, $dbpw, $dbname = '', $dbcharset = '', $pconnect = 0, $tablepre='', $time = 0) {

		$this->dbhost = $dbhost;

		$this->dbuser = $dbuser;

		$this->dbpw = $dbpw;

		$this->dbname = $dbname;

		$this->dbcharset = $dbcharset;

		$this->pconnect = $pconnect;

		$this->tablepre = $tablepre;

		$this->time = $time;



		if($pconnect) {

			if(!$this->link = mysql_pconnect($dbhost, $dbuser, $dbpw)) {

				$this->halt('Can not connect to MySQL server');

			}

		} else {

			if(!$this->link = mysql_connect($dbhost, $dbuser, $dbpw)) {

				$this->halt('Can not connect to MySQL server');

			}

		}

		if($this->version() > '4.1') {

			if($dbcharset) {

				mysql_query("SET character_set_connection=".$dbcharset.", character_set_results=".$dbcharset.", character_set_client=binary", $this->link);

			}



			if($this->version() > '5.0.1') {

				mysql_query("SET sql_mode=''", $this->link);

			}

		}



		if($dbname) {

			mysql_select_db($dbname, $this->link);

		}



	}



	function fetch_array($query, $result_type = MYSQL_ASSOC) {

		return mysql_fetch_array($query, $result_type);

	}



	function result_first($sql) {

		$query = $this->query($sql);

		return $this->result($query, 0);

	}



	function fetch_first($sql) {

		$query = $this->query($sql);

		return $this->fetch_array($query);

	}



	function fetch_all($sql, $id = '') {

		$arr = array();

		$query = $this->query($sql);

		while($data = $this->fetch_array($query)) {

			$id ? $arr[$data[$id]] = $data : $arr[] = $data;

		}

		return $arr;

	}



	function cache_gc() {

		$this->query("DELETE FROM {$this->tablepre}sqlcaches WHERE expiry<$this->time");

	}



	function query($sql, $type = '', $cachetime = FALSE) {

		$func = $type == 'UNBUFFERED' && @function_exists('mysql_unbuffered_query') ? 'mysql_unbuffered_query' : 'mysql_query';

		if(!($query = $func($sql, $this->link)) && $type != 'SILENT') {

			$this->halt('MySQL Query Error', $sql);

		}

		$this->querynum++;

		$this->histories[] = $sql;

		return $query;

	}



	function affected_rows() {

		return mysql_affected_rows($this->link);

	}



	function error() {

		return (($this->link) ? mysql_error($this->link) : mysql_error());

	}



	function errno() {

		return intval(($this->link) ? mysql_errno($this->link) : mysql_errno());

	}



	function result($query, $row) {

		$query = @mysql_result($query, $row);

		return $query;

	}



	function num_rows($query) {

		$query = mysql_num_rows($query);

		return $query;

	}



	function num_fields($query) {

		return mysql_num_fields($query);

	}



	function free_result($query) {

		return mysql_free_result($query);

	}



	function insert_id() {

		return ($id = mysql_insert_id($this->link)) >= 0 ? $id : $this->result($this->query("SELECT last_insert_id()"), 0);

	}



	function fetch_row($query) {

		$query = mysql_fetch_row($query);

		return $query;

	}



	function fetch_fields($query) {

		return mysql_fetch_field($query);

	}



	function version() {

		return mysql_get_server_info($this->link);

	}



	function close() {

		return mysql_close($this->link);

	}



	function halt($message = '', $sql = '') {

		$error = mysql_error();

		$errorno = mysql_errno();

		if($errorno == 2006 && $this->goneaway-- > 0) {

			$this->connect($this->dbhost, $this->dbuser, $this->dbpw, $this->dbname, $this->dbcharset, $this->pconnect, $this->tablepre, $this->time);

			$this->query($sql);

		} else {

			$s = '';

			if($message) {

				$s = "<b>UCenter info:</b> $message<br />";

			}

			if($sql) {

				$s .= '<b>SQL:</b>'.htmlspecialchars($sql).'<br />';

			}

			$s .= '<b>Error:</b>'.$error.'<br />';

			$s .= '<b>Errno:</b>'.$errorno.'<br />';

			$s = str_replace(UC_DBTABLEPRE, '[Table]', $s);

			exit($s);

		}

	}

}



?>