基础例子

来源：互联网发布：靓邦素化妆品淘宝编辑：程序博客网时间：2024/05/17 00:15

1.
<html>
<head>
<title>if_else.php</title>
</head>
<body>

   请输入您的性别：<br>
   <form action="" method="post">
   男<input type="radio" name="gender" value="man">
   女<input type="radio" name="gender" value="woman">
   <input type="submit" value="确定">
</form>
<?
$gender=$_POST['gender'];
   if ($gender=="woman")
      echo "<h2>小姐好</h2>";
   else
echo "<h2>先生好<h2>";
?>
</body>
</html>

2.
<html>
<head>
<title>简单计算器</title>
</head>
<body>
<form action="9-3-1.php" method="post">
操作数1：<input type=text name=num1><br>
操作数2：<input type=text name=num2><br>
<p>
你希望进行何种操作呢?<br>
<input type=radio name=operation value="加" checked>加<br>
<input type=radio name=operation value="减">减<br>
<input type=radio name=operation value="乘">乘<br>
<input type=radio name=operation value="除">除<br>
<input type=submit><input type=reset>
</form>

结果:<? echo $_POST["num1"];?>
<? echo $_POST["operation"];?>
<? echo $_POST["num2"];?>
等于<br>
<h1>
<?php
if( $_POST["operation"]=="加")
{ $x= $_POST["num1"]+ $_POST["num2"];
echo $x;
}
else if( $_POST["operation"]=="减")
{$x= $_POST["num1"]-$_POST["num2"];
echo $x;}
else if( $_POST["operation"]=="乘")
{$x= $_POST["num1"]*$_POST["num2"];
echo $x;}
else if( $_POST["operation"]=="除")
{$x= $_POST["num1"]/ $_POST["num2"];
echo $x;}
else
echo $x;
?>
</h1>
</body>
</html>

3.
<html>
<head>
<title>计算1+2+…+100的值 </title>
</head>
<body>
<?
$sum=0;
for ($i=1; $i<=100; $i++)    //进入循环
   {
    $sum+=$i;                  //执行一次就把$sum加上$i
   }
echo "结果为:".$sum;                   //显示结果
?>
</body>
</html>

4.
<html>
<head>
<title>while.php</title>
</head>
<body>
<?
$sum=0;$i=1;
while($i<=100)
{
$sum+=$i;
$i++;
   };
echo $sum;
?>
</body>
</html>

5.
<html>
<head>
<title>do_while.php</title>
</head>
<body>
<form action="9-3-3.php" method="post">
求和的上限是？<br>
<input type="text" name="up">
<input type="submit" value="确定">
</form>
<?
$sum=0; $i=1;
do {
       $sum+=$i;
       $i++;
     }
while ($i<=$_POST["up"]);
echo "从1开始加到".($_POST["up"]);
echo "<br>";
echo "总和是".$sum;
?>
</body>
</html>

6.
<?
function cal ($cal_nu)
{
$cal_sqr=$cal_nu*$cal_nu;
$cal_cub=$cal_nu*$cal_nu*$cal_nu;
return array ($cal_sqr, $cal_cub);
}
?>
<html>
<head>
<title>计算平方和立方</title>
</head>
<body>

<form action="9-3-4.php" method="post">
请输入一个数字<br>
<input type="text" name="nu_input">
<input type="submit" value="确定">
</form>
<?php
list($sqr, $cub) = cal($_POST["nu_input"]);
echo $_POST["nu_input"]; echo "的平方是："; echo $sqr;
echo "<br>";
echo $_POST["nu_input"]; echo "的立方是："; echo $cub;

?>
</body>
</html>