通常是用mysql还是mysqli

一般是用mysql还是mysqli啊
为什么会有mysqli啊
------解决方案--------------------
新版本的PHP都废弃mysql_系列函数了，显然建议用mysqli 啦。
------解决方案--------------------
mysqli是面向对象，当然也可以面向过程
面向对象

<br />	$mysqli=new mysqli("localhost","root","123456","test");<br />	if($mysqli->connect_error){<br />		die("连接失败".$mysqli->conect_error);<br />	}<br /><br />	$sql="select * from user1";<br />	$res=$mysqli->query($sql);<br /><br />	while($row=$res->fetch_row()){<br />		foreach($row as $k=>$v){<br />			echo "--$v";<br />		}<br />		echo "</br>";<br />	}<br /><br />	$res->free();<br />	$mysqli->close();

面向过程

$mysqli=mysqli_connect("localhost","root","123456","test");<br /><br />	if(!$mysqli){<br />		die("连接失败".mysqli_connect_error($mysqli));<br />	}<br /><br />	$sql="select * from user1";<br />	$res=mysqli_query($mysqli,$sql);<br /><br />	while($row=mysqli_fetch_row($res)){<br />		foreach($row as $k=>$v){<br />			echo "--$v";<br />		}<br />		echo "</br>";<br />	}<br /><br />	mysqli_free_result($res);<br />	mysqli_close($mysqli);

------解决方案--------------------
首选 PDO
其次 mysqli