PHP flock() with compress.zlib:// doesn't work?
<p>Trying to lock a stream using flock but it's not working.</p>

<pre><code>$handle = fopen('/path/to/file.txt', 'r');
flock($handle, LOCK_EX); // Returns true

$handle = fopen('compress.zlib:///path/to/file.txt', 'r');
flock($handle, LOCK_EX); // Returns false
</code></pre>

<p>Why ideas why?</p>
