Uncaught Error: Access to undeclared static property: Phalcon\\Di::$_default

[mohamedziada]

It works fine with PHP 5.6 but when I upgrade to PHP7 this error happens

Uncaught Error: Access to undeclared static property:
Phalcon\Di::$_default bootstrap_web.php.

[:error] [pid 28022:tid 140093905889024] [client xxx.xxx.xxx.xxx:53064] PHP Fatal error: 
Uncaught Error: Access to undeclared static property:
 Phalcon\\Di::$_default in /path/to/website/app/bootstrap_web.php:20
Stack trace:
#0 [internal function]: Phalcon\\Di->__construct()
#1 /path/to/website/app/bootstrap_web.php(20): Phalcon\\Di\\FactoryDefault->__construct()
#2 /path/to/website/public/index.php(18): require(/path/to/website/app/b...')
#3 {main}

Next Error: Access to undeclared static property: Phalcon\\Di::$_default in /path/to/website/app/bootstrap_web.php:20
Stack trace:
#0 [internal function]: Phalcon\\Di->__construct()
#1 /path/to/website/app/bootstrap_web.php(20): Phalcon\\Di\\FactoryDefault->__construct()
#2 /path/to/website/public/index.php(18): require('/path/to/website/app/b...')
#3 {main}
  thrown in /path/to/website/app/bootstrap_web.php on line 20, referer: http://website.url

Details

• Phalcon version: 3.1.2
• PHP Version: PHP 7.0.15 (cli) (built: Feb 27 2017 23:58:56) (Zend Engine v3.0.0 ,with Zend OPcache v7.0.15,)
• Operating System: CentOS Linux release 7.3.1611 (Core)
• Installation type: Compiling from source
• Server: Apache and Compiling from source
• Other related info (Database, table schema): DB Mysql 5.7

[sergeyklay]

@mohamedziada Could you please provide script / steps to reproduce?

[grigoriy-ivanov]

Something similar in #12056

[sergeyklay]

If @mohamedziada used Windows - yes

[hakimio]

Can you reproduce with OPcache disabled? Do you use ApcMetaData?
Can you reproduce running test case provided by renatomjr: #12056 (comment) ?

[hakimio]

ownCloud users are experiencing similar issue with PHP 7 on linux (openSUSE) too :
https://www.bountysource.com/issues/30829375-access-to-undeclared-static-property-oc-files-filesystem-normalizedpathcache
So, it might be possible that it's not only Windows issue.

EDIT: in case of ownCloud, the issue seems to appear when there are some aborted requests/connections. We could also try a similar test case like suggested in the ownCloud thread:
https://pastebin.com/Ywhjx5hq

[Jurigag]

@hakimio but this test case doesn't have phalcon calls so how it's phalcon issue?

[hakimio]

@Jurigag you put your Phalcon calls in your index.php and it tries to simulate cancelled requests.

Edit: inside your index.php, could be sth simple like the following:

$di = new Phalcon\Di();
sleep(1);

[Jurigag]

I just never had this problem on debian 7/ubuntu 14 and php 7/5.6, this is really weird. For sure it's somehow OS/apache related, never had this on php-fpm.

[hakimio]

This never happens on PHP 5.6. It's only PHP 7 issue. I guess, that's because they made some major changes to the way GC and static properties work in PHP 7.

It's easy to just blame the OS without investigating the issue.

[Jurigag]

Im not blaming the OS, im blaming apache. The similar thing that in all those issues people use mod_php - i think somehow mod_php + phalcon is problem, maybe OS related too.

The best will be if someone can do some vagrantbox/docker to reproduce issue. Maybe @sjinks could then do some digging to figure this out.

[mohamedziada]

@sergeyklay I use CentOS 7.3.1611 with compile Apache and PHP and Phalcon as above
Btw it works fine with ubuntu with same versions

sleep(1);

is not a good solutions as i use Phalcon for speed not to sleep :)
My scripts is

public/index.php
<?php require '../app/bootstrap_web.php';

• And files here in gist

https://gist.github.com/mohamedziada/b347247f40bd8f54e8e7717132c4965c

[hakimio]

The sleep() call was just for a simple test case. Solution is to run php-cgi with fcgi+apache or nginx,

[mohamedziada]

@hakimio

sleep() ;

no effect still the same error

[hakimio]

What??? Do you actually understand what I am saying?
I don't think so...

[mohamedziada]

@hakimio yes i try sleep() ; for test
i didn't use
"run php-cgi with fcgi+apache or nginx"
i can't change server settings right now

[mohamedziada]

@hakimio you can explain to me, maybe i understand wrong

[hakimio]

Ok, can you provide some virtual machine or docker image which can reproduce the issue?

[mohamedziada]

@hakimio this is wt i do now, Virtual Machine (vagrant) and will test, but it may takes time from me, cuz i am not in my office next a few days

[salva-flores]

I got the same issue after upgrading to PHP 7.1.1 and phalcon 3.1.2.

[Jurigag]

@salva-flores as already mentioned in many places, use php-fpm/fcgi

[sergeyklay]

Close in favor of #12056