php $_POST[]获取表单数据方法

在php教程获取表单数据有专用的命令， $_POST[]就是这个函数了，下面我们一个简单的实例

<?php
echo 'Hello, ' . $_POST['first_name'] . '!';
?>

输出是来自表单的first_name的值。

再复杂一点点的实例，

$_POST['name'] = trim($_POST['name']);

if (strlen($_POST['name']) == 0) {
$errors[] = "Your name is required.";
}

好了，下面做一个关于$_POST的完整实例

<?php
$user = $_POST['user'];
$color = $_POST['color'];
$self = $_SERVER['PHP_SELF'];

if( ( $user != null ) and ( $color != null ) )
{
    setcookie( "firstname", $user , time() + 36000 );
    setcookie( "fontcolor", $color, time() + 36000 );
    header( "Location:getcookie.php" );
    exit();
}
?>

<html>

<head>
<title>Set Cookie Data</title>
</head>

<body>

<form action ="<?php echo( $self ); ?>" method = "post">

Please enter your first name:
<input type = "text" name = "user"><br><br>

Please choose your favorite font color:<br>
<input type = "radio" name = "color" value = "#FF0000">Red
<input type = "radio" name = "color" value = "#00FF00">Green
<input type = "radio" name = "color" value = "#0000FF">Blue
<br><br>
<input type = "submit" value = "submit">
</form>

</body>

</html>

总结：上面的实例没做安全处理，只是简单的获取了表单提交的数据，我们可以做一些安全处理，如isset() addslashes 等处理。

补充：Php教程,Php入门