<?php/*//方式一：已經(jīng)過時(shí) //1.造一個(gè)連接（建立通道） $db = mysql_connect("localhost","root","123"); //2.選擇要操作哪一個(gè)數(shù)據(jù)庫(kù) mysql_select_db("mydb",$db); //3.寫SQL語句 $sql = "select * from Info"; //4.執(zhí)行SQL語句，返回結(jié)果集 $result = mysql_query($sql); //5.從結(jié)果集中取數(shù)據(jù) while($row = mysql_fetch_row($result)) {var_dump($row); }*///方式二：面向?qū)ο蟮姆绞?//1.造一個(gè)連接對(duì)象 //$db = new MySQLi("localhost","root","123","mydb"); //2.判斷連接是否出錯(cuò) /*if(mysqli_connect_error()) {echo "連接失敗";exit(); //退出程序 }*///!mysqli_connect_error() or die("連接失敗！");//3.寫SQL語句 //$sql = "select count(*) from Info"; //$sql = "insert into Info values('p001','','','','')";//4.執(zhí)行SQL語句,查詢語句如果執(zhí)行成功返回結(jié)果集對(duì)象，如果執(zhí)行失敗返回false //$result = $db->query($sql);//5.從結(jié)果集中讀取數(shù)據(jù) //if($result) //{//var_dump($result->fetch_row()); //返回一行數(shù)據(jù)的數(shù)組（索引數(shù)組）/*while($row = $result->fetch_row()){var_dump($row);}*///var_dump($result->fetch_assoc());//返回一行數(shù)據(jù)（關(guān)聯(lián)數(shù)組）//$shuju = $result->fetch_all();//返回所有數(shù)據(jù)（二維數(shù)組）//var_dump($result->fetch_object());//返回一行數(shù)據(jù)（對(duì)象）//echo $shuju[0][0];//}//1.造連接對(duì)象 $db = new MySQLi("localhost","root","123","mydb"); //2.判斷是否出錯(cuò) !mysqli_connect_error() or die("連接失敗！"); //3.寫SQL語句 $sql = "select * from Nation"; //4.執(zhí)行SQL語句 $result = $db->query($sql); //5.取數(shù)據(jù) if($result) {$attr = $result->fetch_all();echo "<select>";foreach($attr as $v){echo "<option value='{$v[0]}'>{$v[1]}</option>";}echo "</select>"; }?>

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轉(zhuǎn)載于:https://www.cnblogs.com/yy01/p/5458249.html

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