当前位置: 首页 > 网络学院 > 服务端脚本教程 > PHP > is_uploaded_file() 函数
The is_uploaded_file() function checks whether the specified file is uploaded via HTTP POST.
is_uploaded_file()函数的作用是:判断文件是否是通过HTTPPOST上传的。
This function returns TRUE if the file is uploaded via HTTP POST.
如果文件是通过HTTPPOST上传的,那么该函数将返回True。
is_uploaded_file(file) |
Parameter 参数 | Description 描述 |
---|---|
file | Required. Specifies the file to check 必要参数。指定文件对象 |
Note: The result of this function are cached. Use clearstatcache() to clear the cache.
注意:这个函数的结果将被自动缓存。你可以使用clearstatcache()函数来清除这个缓存。
<?php $file = "test.txt"; if(is_uploaded_file($file)) { echo ("$file is uploaded via HTTP POST"); } else { echo ("$file is not uploaded via HTTP POST"); } ?> |
The output of the code above could be:
上述代码将输出下面的结果:
test.txt is not uploaded via HTTP POST |