Zend OpCache Premature End of Script Headers

[benwis]

Whenever I enable the opcache, I get 500 internal server errors for almost all our pages in a Wordpress install. I'm not sure if it's a bug or not, but it's unusable for us in its current state. Let me know if you could use any more date
php -v
PHP 5.4.29 (cli) (built: Jun 9 2014 11:43:06)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2014 Zend Technologies
with the ionCube PHP Loader v4.6.1, Copyright (c) 2002-2014, by ionCube Ltd., and
with Zend Guard Loader v3.3, Copyright (c) 1998-2013, by Zend Technologies
with Zend OPcache v7.0.3, Copyright (c) 1999-2014, by Zend Technologies

php.ini
extension=opcache.so
zend_extension="/usr/local/Zend/lib/Guard-6.0.0/php-5.4.x/ZendGuardLoader.so"
zend_extension="/usr/local/lib/php/extensions/no-debug-non-zts-20100525/opcache.so"
opcache.memory_consumption=256
opcache.interned_strings_buffer=8
opcache.max_accelerated_files=4000
opcache.revalidate_freq=0
opcache.fast_shutdown=1
opcache.enable_cli=1
opcache.enable=1
opcache.interned_strings_buffer=8
opcache.max_accelerated_files=4000

apache logs
[Wed Jun 11 12:40:28 2014] [error] [client 130.65.123.3] Premature end of script headers: op.php

We get a variety of those errors for every php file we have, from index.php to wp-login.php.

Is it a bug or am I setup wrong?

Thanks

[lazy404]

opcache won't work with ionCube enabled,
Zend Guard Loader might also be problematic

[towe75]

Hi,

is there any official statement from Zend inc. about the OSS zendoptimizer+ / opcache in combination with the Zend Guard Loader? The available guard loader documentation is not very helpful regarding working/supported combinations.

In other words: can i use vanilla php with opcache and zend guard loader?

Thanks