1.1使用一个简单的输入表单
表单页
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
</head>
<body>
<form method="post" action="send.php">
<input type="text" name="user" />
<textarea name="message">
</textarea>
<button type="submit">发送消息</button>
</form>
</body>
</html>
send.php
<!doctype html> <html> <head> <meta charset="utf-8"> <title>无标题文档</title> </head> <body> <?php echo $_POST['user']."：".$_POST['message']; ?> </body> </html>
使用超全局变量$_POST访问表单输入的数据
1.2使用数组访问表单
表单页面
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
</head>
<body>
<form method="post" action="send.php">
1.
<input type="checkbox" name="products[]" value="yellow"/>
<br />2.
<input type="checkbox" name="products[]" value="red"/>
<br />3.
<input type="checkbox" name="products[]" value="blue"/>
<br />
<button type="submit">提交</button>
</form>
</body>
</html>
send.php
<!doctype html> <html> <head> <meta charset="utf-8"> <title>无标题文档</title> </head> <body> <?php //empty判断是否为空 if (!empty($_POST['products'])){ echo "<ul>"; //foreach遍历数组 foreach($_POST['products'] as $value) { echo "<li>".$value."</li>"; } echo "</ul>"; }else { echo "没有选择"; } ?> </body> </html>
将同类的输入存放到数组中，只需要在变量名后面加个[]就可以。如上述实例中每个input的name属性都是products[];
1.3在单个页面提交表单
猜数字程序
<?php $comfirm_num = 42; //isset检测变量是否设置 if(!isset($_POST['guess'])){ $message = "猜数字游戏"; } else if (!is_numeric($_POST['guess'])){ $message = "请输入数字"; } else if ($_POST['guess'] == $comfirm_num ){ $message = "正确"; } else if ($_POST['guess'] > $comfirm_num ){ $message = "大了"; } else if ($_POST['guess'] < $comfirm_num ){ $message = "小了"; } else { $message = "你好强大！"; } ?> <!doctype html> <html> <head> <meta charset="utf-8"> <title>无标题文档</title> </head> <body> <!--$_SERVER['PHP_SELF'];重载当前页面--> <form method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>"> <input type="text" name="guess"/> <button type="submit">提交</button> </form> <?php echo $message ?> </body> </html>