PHP: How to check the access mode of already opened file handler?

Question

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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?

What do you need this for? What's the [overall goal](http://meta.stackexchange.com/questions/66377/)? — outis, Dec 25 '11 at 08:38
@outis frankly, no specific goal for now. one use may be 'restrict access to write mode handlers'. thanks for editing question :) — P K, Dec 25 '11 at 08:43
Here's an earlier post with a solution and detailed explanation: http://stackoverflow.com/questions/5294305/how-to-check-if-a-php-stream-resource-is-readable-or-writable — Abbas, Dec 26 '11 at 08:43

score 5 · Accepted Answer · answered Dec 25 '11 at 08:51

5

A possible solution to find the mode:

$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.

answered Dec 25 '11 at 08:51

ThinkingMonkey

1 Answers1