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开始使用写php的时候，里面的php代码不解释，直接按原样输出了，我就很纳闷呀，用utf-8编码能解释，就是中文乱码，用unicode编码中文件不乱码了，就是php不解释，开始以为是 php 出问题呢，后来想到了页面被浏览器显示的问题。
解决方法：
文件保存为utf-8,php就能解释了，为了不乱码要在 head 中加入下面两句话，这下又能解释php又不乱码了，ok ：
<meta http-equiv=Content-Type content="text/html;charset=utf-8"> <meta http-equiv=X-UA-Compatible content=IE=EmulateIE7>
呵呵，附上基础的练习代码：
<html>
<head>
<meta http-equiv=Content-Type content="text/html;charset=utf-8"><meta http-equiv=X-UA-Compatible content=IE=EmulateIE7>
<title>php测试首页</title>
<style>
<!-- Hide style for old browsers
BODY {font-family: MS Sans Serif;font-size="10"}
.headd { font-family: Helvetica,Verdana ; font-size: 13pt; text-decoration: none; }
.app { font-family: MS Sans Serif ; font-size: 10pt; text-decoration: none; }
A:link {text-decoration: none; color: #0000FF}
A:visited {text-decoration: none; color: #0000FF}
A:hover {text-decoration: none; color: #FF0000}
A:active {text-decoration: none; color: #FF0000}
-->
</style>
</head>
<body bgcolor="#FFFFFF">
<div align="left">
<?
$txt = "Hello World!";
$number = 16;
echo "你好呀<br/>";
$isConn=true;
$conn=mysql_connect("localhost","root","123456");//连接数据库测试
if($isConn && $conn)//if...else 判断
{
echo " 连接成功！";
}
elseif($isConn==false)
{
echo " 不需要连接！";
}
else
{
echo " 连接失败！";
}
$pos=strpos($txt,"world");//找字符串位置，找不到返回false
if($pos==false) $pos=-1;
echo "<br/> ".$txt." ".$number;//.号为字符串连接
echo "<br/> ".strlen($txt)." ".strlen("你good");//字符串长度
echo "<br/> ".$pos;
echo "<br/> ".md5($txt);//md5加密
echo "<br/> ".html_entity_decode(" <br/> <font>1234</font>");//html解码
echo "<br/> ".htmlentities("<br/> <font>1234</font>");//html编码
echo "<br/> ";
switch ($number)//switch语句判断
{
case 1:
echo "Number 1";
break;
case 2:
echo "Number 2";
break;
case 3:
echo "Number 3";
break;
default:
echo "No number between 1 and 3,is:".$number;
}
$ages['Peter'] = "32";
$ages['Quagmire'] = "30";
$ages['Joe'] = "34";
echo "<br/> Quagmire is " . $ages['Quagmire'] . " years old.";
$arr=array("one", "two", "three");
echo "<br/> for: ";
$arrlen=count($arr);//计算数组长度
for ($i=0; $i<$arrlen; $i++)//for语法
{
echo $arr[$i]." ;";
}
echo "<br/> foreach: ";
foreach ($arr as $value)//foreach语法
{
echo "Value: " . $value . ";";
}
function copyRight()//函数
{
echo "power by pkm";
}
function myadd($num1,$num2)//带参数的函数
{
return $num1+$num2;
}
echo "<br/> copy right:";
copyRight();//调用函数
echo "<br/> 5 + 4 is ".myadd(5,4).".";
/*
$name_post=$_POST["name"];//获取post提交的数据
$age_post=$_POST["age"];
$name_get=$_GET["name"];//获取get提交的数据
$age_get=$_GET["age"];
if($name_post==null)
{
$name_post=$name_get;
$age_post=$age_get;
}
*/
$name_post=$_REQUEST["name"];//获取post或get提交的数据
$age_post=$_REQUEST["age"];
?>
</div>
<div align="left">
<form action="" method="post">
Name: <input type="text" name="name" />
Age: <input type="text" name="age" />
<input type="submit" value="post提交" />
</form>
<form action="" method="get">
Name: <input type="text" name="name" />
Age: <input type="text" name="age" />
<input type="submit" value="get提交" />
</form>
<br/>
Welcome <?php echo $name_post; ?>.<br />
You are <?php echo $age_post; ?> years old.
</div>
</body>
</html>执行效果：
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