获取不到post数据
<?php
header("Content-type:text/html;charset=utf-8");
echo <<<'FROM'
< from action="" method="post">
请输入一个整数：
FROM;
echo isset($_POST['num']);
<?php
header("Content-type:text/html;charset=utf-8");
echo <<<'FROM'
< from action="" method="post">
请输入一个整数：
FROM;
echo isset($_POST['num']);
