Some further notes:

The code always fails, not just sometimes.
It fails regardless of the specified size.
It worked on PHP 5.3.1 (haven't tested later versions).

I apply a fix to all branches (5.3 was possibly affected as well). Please try a 
snapshot with the revision id equal or higher to the commit referred here.

I just tried snaps for 312169 and 312203. The former still worked, but the latter was already broken:

D:\htdocs\stack>C:\php312169\php.exe -f quick.php
string(1) "ð"

D:\htdocs\stack>C:\php312203\php.exe -f quick.php

Fatal error: mcrypt_create_iv(): Could not gather sufficient random data in D:\h
tdocs\stack\quick.php on line 3

Just tried the snap for 312201, too, and it seems to work there too. Does that mean that either 312202 or 312203 broke it?

D:\htdocs\stack>C:\php312201\php.exe -f quick.php
string(1) "B"

Oi, I didn't see your comment, I'm sorry. I will try as soon as a binary is available ;)

yes, 313110 or higher is what you have to test (see the commit in this report, the 
commits tab).

I'm still seeing the issue in 313114:

D:\htdocs\stack>C:\php313114\php.exe -f quick.php

Warning: mcrypt_create_iv(): Could not gather sufficient random data in D:\htdoc
s\stack\quick.php on line 3
bool(false)

I just tried using an nts instead of a ts build, and it worked there. So it's seems to be some thread safety related problem.

I can't reproduce the problem, are you sure you used the right binaries?


c:\test\php540r313114>php -d extension_dir=ext -d extension=php_openssl.dll -r 
"var_dump(mcrypt_create_iv(1, MCRYPT_DEV_URANDOM));"
string(1) "☺"

and using NTS:

c:\test\php540ntsr313114>php -d extension_dir=ext -d extension=php_openssl.dll -
r "var_dump(mcrypt_create_iv(1, MCRYPT_DEV_URANDOM));"
string(1) "║"

Hm, seems like I indeed used some wrong binary. I have just downloaded 313114ts again and it worked :)

Thanks for the quick fix and sorry for the confusion ^^

Closing this then ;)

Argh, I just can't handle this bugtracker :( Seems like it assignes the bug to me if I leave the "Assign to" field empty.

Why is this Bogus now?

No idea, who made that change?

I did. Sorry, misread the bug. The lesson is that I need to do one thing at once, 
rather than ten. :)

Okay, closing it again then ;)

just assigning it to me, needs some more testing under apache and IIS, Seldaek is 
still having this problem

Quick update, issue fixed in svn (5.3+), keep it open until Ryan applies the new 
tests.

This bug has been fixed in SVN.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.

 For Windows:

http://windows.php.net/snapshots/
 
Thank you for the report, and for helping us make PHP better.