代码示例:(标识:demo_php_global_post)
<!DOCTYPE html>
<html>
<body>

<form method="post" action="<?php echo $_SERVER['PHP_SELF'];?>">
Name: <input type="text" name="fname">
<input type="submit">
</form>

<?php 
$name = $_POST['fname']; 
echo $name; 
?>

<p>PS:演示中接收的数据都进行过urlencode()编码</p>
</body>
</html>
运行结果: