Re: How to output a NULL field?

[hack988 hack988 <hack988@xxxxxxxxxxxxx>]

My code for mssql
please enable the php's mssql extentions.
it used like so many mysql class that you can find by google
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<?php
if(!defined('IN_WEB')) {
	exit('Access Denied');
}
ini_set('mssql.datetimeconvert',0);//php>4.2.0 disable php's automatic
datetime convert
Class DB {
	var $querynum=0;
	var $mssql_link;
	var $conn_link;
	var $sp_link;
	var $sp_name='';
	var $error_stop=0;
	var $show_error=0;
	var $dbhost;
	var $dbuser;
	var $dbpw;
	var $dbname;
	var $pconnect;
	var $var_type=array();
	var $fields_name=array();
	var $last_error_msg='';
	var $phprunversion='';
	function DB() {
			//define type for sp
			$this->var_type['sp_bit']=SQLBIT;
			$this->var_type['sp_tinyint']=SQLINT1;
			$this->var_type['sp_smallint']=SQLINT2;
			$this->var_type['sp_int']=SQLINT4;
			$this->var_type['sp_bigint']=SQLVARCHAR;
			$this->var_type['sp_real']=SQLFLT4;
			$this->var_type['sp_float']=SQLFLT8;
			$this->var_type['sp_float-null']=SQLFLTN;
			$this->var_type['sp_smallmoney']=SQLFLT8;
			$this->var_type['sp_money']=SQLFLT8;
			$this->var_type['sp_money-null']=SQLFLT8;
			$this->var_type['sp_char']=SQLCHAR;
			$this->var_type['sp_varchar']=SQLVARCHAR;
			$this->var_type['sp_text']=SQLTEXT;
			$this->var_type['sp_datetime']=SQLINT4;
			$this->phprunversion=phpversion();
			//end
	}
/*>=php4.4.1,>=php5.1.1
a new paramate for if use newlink for connect,pconnect
*/
	function rconnect($newlink=false){//2007.03.01 by hack988 fix phpversion check
		if($this->phprunversion >= '4.4.1' && $this->phprunversion < '5.0.0'
|| $this->phprunversion >= '5.1.1'){
			return $this->rconnect4p($newlink);
		}else{
			return $this->rconnect3p();
		}
	}
	function rconnect3p(){
		$this->mssql_link = $this->pconnect==0 ?
mssql_connect($this->dbhost, $this->dbuser, $this->dbpw) :
mssql_pconnect($this->dbhost, $this->dbuser, $this->dbpw);
		if(!$this->mssql_link){
			$this->halt("connect
($this->pconnect)MSSQL($this->dbhost,$this->dbuser)failed!");
			return false;
		}else{
			$this->conn_link=$this->mssql_link;
			if($this->dbname) {
				if (!@$this->select_db($this->dbname,$this->conn_link)){
					$this->halt('can not use database '.$this->dbname);
					return false;
				}else{
					return true;
				}
			}else{
				return true;
			}
		}
	}
	function rconnect4p($newlink=false){
		$this->mssql_link = $this->pconnect==0 ?
mssql_connect($this->dbhost, $this->dbuser, $this->dbpw , $newlink) :
mssql_pconnect($this->dbhost, $this->dbuser, $this->dbpw, $newlink);
		if(!$this->mssql_link){
			$this->halt("reconect($this->pconnect)MSSQL($this->dbhost,$this->dbuser)failed");
			return false;
		}else{
			$this->conn_link=$this->mssql_link;
			if($this->dbname) {
				if (!@$this->select_db($this->dbname,$this->conn_link)){
					$this->halt('can not use database '.$this->dbname);
					return false;
				}else{
					return true;
				}
			}else{
				return true;
			}
		}
	}

	function connect($dbhost, $dbuser, $dbpw, $dbname, $pconnect =
0,$auto_conn=0 ,$newlink=false) {
		$this->dbhost=$dbhost;
		$this->dbuser=$dbuser;
		$this->dbpw=$dbpw;
		$this->dbname=$dbname;
		$this->pconnect=$pconnect;
		if($auto_conn){
			return $this->rconnect($newlink);
		}else{
			return true;
		}
	}

	function close() {
		if($this->conn_link){
			$result=mssql_close($this->conn_link);
		}else{
			$result=true;
		}
		$this->mssql_link='';
		$this->sp_link='';
		$this->conn_link='';
		return $result;
	}

	function select_db($dbname){
		$this->mssql_link=mssql_select_db("[".$dbname."]");
		return $this->mssql_link;
	}

	function query($SQL,$method='') {
		if($method=='UNBUFFERED'){
			mssql_query("SET NOCOUNT ON",$this->conn_link);
			$this->mssql_link = mssql_query($SQL,$this->conn_link);
			mssql_query("SET NOCOUNT OFF",$this->conn_link);
		}else{
			$this->mssql_link = mssql_query($SQL,$this->conn_link);
		}

		if (!$this->mssql_link)  $this->halt('SQL query error: ' . $SQL);
		$this->querynum++;
		return $this->mssql_link;
	}
	
	function get_one($sql,$prefix=""){
		$query=$this->query($sql,'UNBUFFERED');
		if(strlen($prefix)>0){
			$this->get_fields_name();
			$rs=$this->fetch_duplicate_array($query);
		}else{
			$rs = $this->fetch_array($query, MSSQL_ASSOC);
		}
		return $rs;
	}

	function seek($num,$link=''){
		$link = empty($link) ? $this->mssql_link : $link;
		return mssql_data_seek($link,$num);
	}

	function fetch_array($query, $result_type = MSSQL_ASSOC) {
		return mssql_fetch_array($query, $result_type);
	}

	function fetch_duplicate_array($query, $prefix="dup_") {
		if(count($this->fields_name)<1) return false;
		$fields=$this->fetch_array($query, MYSQL_NUM);
		if(!$fields) return false;
		$reternfields=array();
		foreach($fields AS $key=>$value){
			if(isset($reternfields[$this->fields_name[$key]]))
				$reternfields[$prefix.$this->fields_name[$key]]=$value;
			else
				$reternfields[$this->fields_name[$key]]=$fields[$key];
		}
		return $reternfields;
	}

	function affected_rows($link='') {
		$link= empty($link) ? $this->conn_link :$link;
		return mssql_rows_affected($link);
	}

	function get_fields_name($link=''){
		$link= empty($link) ? $this->mssql_link :$link;
		$fieldscount=$this->num_fields($link);
		for($i=0;$i<$fieldscount;$i++){
			$field[$i]=mssql_field_name($this->mssql_link,$i);
		}
		$this->fields_name=$field;
	}

	function num_rows($link='') {
		$link = empty($link) ? $this->mssql_link : $link;
		$rows = mssql_num_rows($link);
		return $rows;
	}

	function num_fields($query) {
		return mssql_num_fields($query);
	}

	function sp_init($sp_name){
		$this->sp_link=mssql_init($sp_name,$this->conn_link);
		!$this->sp_link && $this->halt('Init PROCEDURE Failed :' . $sp_name);
		$this->sp_name=$sp_name;
		return $this->sp_link;
	}

	function sp_bind($parameter,&$var,$type,$if_out=false,$if_null=false){
		if(!$this->sp_link){
			 $this->halt('Can not bind var for PROCEDURE' . $parameter);
			 return false;
		}else{
			if(!mssql_bind($this->sp_link,$parameter,$var,$this->var_type[$type],$if_out,$if_null)){
				$this->halt('PROCEDURE var binding failed' .
$parameter.$this->var_type[$type]);
				return false;
			}else{
				return true;
			}
		}
	}

	function sp_execute($skipout,$sp_link=''){
		$this->sp_link=$sp_link? $sp_link : $this->sp_link;
		$this->mssql_link=mssql_execute($this->sp_link,$skipout);
		if (!$this->mssql_link)  $this->halt('exec PROCEDURE failed: ' . $SQL);
		$this->querynum++;
		return $this->mssql_link;
	}

	function sp_free_statement($sp_link=''){
		$this->sp_link=$sp_link? $sp_link : $this->sp_link;
		if(!mssql_free_statement($this->sp_link)){
			$this->halt('free memory failed (PROCEDURE)：'.$this->sp_name);
			return false;
		}else{
			$this->sp_link='';
			return true;
		}
	}

	function free_result($query) {
		return mssql_free_result($query);
	}

	function insert_id() {
		$rs = $this->get_one("SELECT @@IDENTITY AS [insertid]");
		if($rs)
			return $rs['insertid'];
		else
			return false;
	}

	function halt($msg='') {
		if($this->show_error){
			echo date("Y-m-d H:i:s",time())."<br/>\n";
			echo $msg."<br/>\n";
			$this->last_error_msg="SQL Server
Msg:".nl2br(mssql_get_last_message())."<br/>\n";
			echo $this->last_error_msg;
			$this->last_error_msg = $msg.$this->last_error_msg;
		}
		$this->error_stop && exit;
	}
}
?>

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