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PHP接收上传的文件

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Jun 20, 2016 pm 12:53 PM

提交文件的HTML页面：

<!DOCTYPE html><html><head><meta charset="UTF-8"><title>文件上传</title><!--注意：enctype="multipart/form-data";拼写不要写成enctype="multipart/from-data";重点：enctype="multipart/form-data"type="file"--></head><body>    <form action="u.php" method="post" enctype="multipart/form-data">        用户名:<input type="text" name="username" /><br />        头像:<input type="file" name="pic" /><br />        <input type="submit" value="提交" />    </form></body></html>

PHP接收文件：

<?php/*PHP文件上传的过程:1:提交后,文件自动发到服务器上,形成一个临时文件2:在服务器上,只需要把临时文件移动到自己想要的位置，就可以完成上传操作疑问: 临时文件在哪儿呢?文件的其他信息如 文件名,文件大小,等,又在哪儿呢?答: PHP形成临时文件后,还会形成一个$_FILES超级全局数组数组里保存着文件的临时地址,临时名称,大小,等信息.所以 想上传文件,得先读$_FILES*//*文件上传的注意事项1:必须POST提交2:要声明 enctype选项*/echo "<pre class="brush:php;toolbar:false">";print_r($_FILES);echo "

";/*3:如何移动上传后的临时文件呢?答:用move_uploaded_file()函数*//*4:这个临时文件什么时间消失?答:临时文件在接收的.php文件结束后,就立即消失了.比如:02.php负责接收,当02.php运行完毕,临时文件就消失.sleep(5); //睡5秒钟,便于观察临时文件if(move_uploaded_file($_FILES['pic']['tmp_name'],'./file/' . $_FILES['pic']['name'])) { echo '成功';} else { echo '失败';}*/

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