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。