<?php
include '../config.php';
include '../head.php';
include '../card.php';

$is_upload = false;
$msg = null;
if(isset($_POST['submit'])){
    $ext_arr = array('jpg','png','gif');
    $file_ext = substr($_FILES['upload_file']['name'],strrpos($_FILES['upload_file']['name'],".")+1);
    if(in_array($file_ext,$ext_arr)){
        $temp_file = $_FILES['upload_file']['tmp_name'];
        $img_path = $_POST['save_path']."/".rand(10, 99).date("YmdHis").".".$file_ext;

        if(move_uploaded_file($temp_file,$img_path)){
            $is_upload = true;
        } else {
            $msg = "上传失败";
        }
    } else {
        $msg = "只允许上传.jpg|.png|.gif类型文件！";
    }
}
?>

    <ol>
        <li>
            <h3>任务</h3>
            <p>上传一个<code>webshell</code>到服务器。</p>
        </li>
        <li>
            <h3>上传区</h3>
            <form enctype="multipart/form-data" method="post">
                <p>请选择要上传的图片：<p>
                <input type="hidden" name="save_path" value="../upload/"/>
                <input class="input_file" type="file" name="upload_file"/>
                <input class="button" type="submit" name="submit" value="上传"/>
            </form>
            <div id="msg">
                <?php 
                    if($msg != null){
                        echo "提示：".$msg;
                    }
                ?>
            </div>
            <div id="img">
                <?php
                    if($is_upload){
                        echo '<img src="'.$img_path.'" width="250px" />';
                    }
                ?>
            </div>
        </li>
        <?php 
            if($_GET['action'] == "show_code"){
                include 'show_code.php';
            }
        ?>
    </ol>
</div>

<?php
include '../footer.php';
?>