php connect to database

  <?php 

$conn = mysql_connect(&#39;localhost&#39;,&#39;root&#39;,&#39;&#39;);
if($conn){
	// echo &#39;连接成功！&#39;;
	mysql_select_db(&#39;test&#39;,$conn);
	$result = mysql_query("SELECT * FROM user");
	// $res_arr = mysql_fetch_array($result);           //获得一条数据信息
	// print_r($res_arr);
	// $res_arr1 = mysql_fetch_assoc($result);        //获的一条数据信息（键和值）
	// print_r($res_arr1);
	$count = mysql_num_rows($result);                 //获取数据的个数
	for(i = 0;i<$count;i++){
		print_r(mysql_fetch_assoc($result));
	}
}else{
	echo &#39;失败！&#39;;
}

?>

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