PHP：如何检查已打开的文件处理程序的访问模式？ [重复]

Possible Duplicate:
How to check if a PHP stream resource is readable or writable?

Does PHP provide any function to check the access mode of file handle? Suppose I opened a file in read only mode.

 $file_handle = fopen('putty.log','r');

Can I check a particular handle's access mode in code?

A possible solution to find the mode:

Use function stream_get_meta_data:

$file_handle = fopen('putty.log','r');
$metadata = stream_get_meta_data($file_handle);
echo $metadata['mode'];

For more on the array returned read the manual.