_0@del_product.
_0@Db.
PHP;">
time = $this->microtime_float();
require_once("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){
$handle = fopen($db_config["logfilepath"]."dblog.txt","a+");
$this->handle=$handle;
}
}
//
数据库连接
public function connect($dbhost,$dbuser,$dbpw,$dbname,$pconnect = 0,$charset='utf8') {
if( $pconnect==0 ) {
$this->link_id = @
MysqL_connect($dbhost,true);
if(!$this->link_id){
$this->halt("
数据库连接失败");
}
} else {
$this->link_id = @
MysqL_pconnect($dbhost,$dbpw);
if(!$this->link_id){
$this->halt("
数据库持久连接失败");
}
}
if(!@
MysqL_select_db($dbname,$this->link_id)) {
$this->halt('
数据库选择失败');
}
@
MysqL_query("set names ".$charset);
}
//
查询
public function query($
sql) {
$this->write_log("
查询 ".$
sql);
$query =
MysqL_query($
sql,$this->link_id);
if(!$query) $this->halt('Query Error: ' . $
sql);
return $query;
}
//
获取一条记录（
MysqL_ASSOC，
MysqL_NUM，
MysqL_BOTH）
public function get_one($
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 $rt;
}
//
获取全部记录
public function get_all($
sql,$result_type =
MysqL_ASSOC) {
$query = $this->query($
sql);
$i = 0;
$rt = array();
while($row =&
MysqL_fetch_array($query,$result_type)) {
$rt[$i]=$row;
$i++;
}
$this->write_log("
获取全部记录 ".$
sql);
return $rt;
}
//插入
public function insert($table,$dataArray) {
$field = "";
$value = "";
if( !is_array($dataArray) || count($dataArray)<=0) {
$this->halt('没有要插入的数据');
return false;
}
while(list($key,$val)=each($dataArray)) {
$field .="$key,";
$value .="'$val',";
}
$field = substr( $field,-1);
$value = substr( $value,-1);
$
sql = "insert into $table($field) values($value)";
$this->write_log("插入 ".$
sql);
if(!$this->query($
sql)) return false;
return true;
}
//更新
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,-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
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
public function fetch_array($query,$result_type =
MysqL_ASSOC){
$this->write_log("返回结果集");
return
MysqL_fetch_array($query,$result_type);
}
//
获取记录条数
public function num_rows($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;
}
}
//释放结果集
public function free_result() {
$void = func_get_args();
foreach($void as $query) {
if(is_resource($query) && get_resource_type($query) === '
MysqL result') {
return
MysqL_free_result($query);
}
}
$this->write_log("释放结果集");
}
//
获取最后插入的id
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
protected 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);
}
//析构
函数
public function __destruct() {
$this->free_result();
$use_time = ($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);
}
}
//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);
}
}
//
获取毫秒数
public function microtime_float() {
list($usec,$sec) = explode(" ",microtime());
return ((float)$usec + (float)$sec);
}
}
?>
_0@config.db.
