String class name issue for php7

[sidealice]

Fatal error: Cannot use 'String' as class name as it is reserved in lib/internal/Magento/Framework/Data/Argument/Interpreter/String.php on line 14

[alankent]

Yes, there are a few similar class named we hit when we tried php 7 as well. Good news was there were not many that needed to be renamed to get php to work. (I don't recall where that got to on the backlog.)

[orlangur]

PHP7 is not supported yet: https://github.com/magento/magento2/blob/develop/composer.json#L11

There are more reserved words which needs to be considered: http://php.net/manual/en/reserved.other-reserved-words.php The most frequently used in code base is object I believe.

[vpelipenko]

Internal ticket: MAGETWO-37817

[dccampbell]

Just for reference, a quick scan for classes w/ newly reserved words as names:

app\code\Magento\Backend\Model\Resource\Translate\String.php
app\code\Magento\CatalogImportExport\Model\Import\Proxy\Product\Resource.php
app\code\Magento\Eav\Model\Entity\Increment\Numeric.php
app\code\Magento\Translation\Model\Resource\String.php
app\code\Magento\Translation\Model\String.php
dev\tests\functional\lib\Magento\Mtf\Util\Generate\Repository\Resource.php
lib\internal\Magento\Framework\Acl\Loader\Resource.php
lib\internal\Magento\Framework\Acl\Resource.php
lib\internal\Magento\Framework\Data\Argument\Interpreter\Object.php
lib\internal\Magento\Framework\Data\Argument\Interpreter\String.php
lib\internal\Magento\Framework\DB\Logger\Null.php
lib\internal\Magento\Framework\Filter\Object.php
lib\internal\Magento\Framework\Flag\Resource.php
lib\internal\Magento\Framework\Module\Resource.php
lib\internal\Magento\Framework\Object.php
lib\internal\Magento\Framework\Search\Request\Filter\Bool.php
lib\internal\Magento\Framework\Search\Request\Query\Bool.php
lib\internal\Magento\Framework\Validator\Float.php
lib\internal\Magento\Framework\Validator\Int.php
lib\internal\Magento\Framework\Validator\Object.php
lib\internal\Magento\Framework\Validator\Test\Unit\Test\Int.php
lib\internal\Magento\Framework\Validator\Test\Unit\Test\True.php
lib\internal\Magento\Framework\View\Layout\Argument\Interpreter\Object.php

[cscd98]

@vpelipenko Any chance you will also be fixing Magento 1.9?

A minor incompatibility has to be fixed before using Magento with PHP 7.

You have to modify the file app/code/core/Mage/Core/Model/Layout.php on line 555:

Modify the line so it looks like this:

$this->getBlock($callback[0])->{$callback[1]}();

Source - http://afilina.com/magento-1-9-on-php7/

Also I am unable to login to /admin

[vpelipenko]

@craigcarnell, probably yes, but I don't know when.

[vpelipenko]

Adaptation of code to PHP7 was done and all changes are available in develop branch. Please, try this. If you have any question or face with new issues, please, let us know.

[dccampbell]

I just tried the latest develop code on the rasmus/php7dev Vagrant box and still got the same error as in the OP of this issue. Also, composer.json currently only allows PHP 5.5.x and 5.6.x.

Had an interesting folder conflict that loaded the old version. New one seems to be running so far, will test more once I get a nice environment scripted.

[orlangur]

@dccampbell, there is no String class in develop anymore, it was renamed to StringUtils: https://github.com/magento/magento2/tree/develop/lib/internal/Magento/Framework/Data/Argument/Interpreter

[dccampbell]

Finally got a box setup. Install went fine but when I hit any page I get:
==> default: Fatal error: Uncaught ErrorException: session_write_close(): Failed to write session data (user). Not sure if my environment (Debian8 guest on Win7 host), or PHP7-related. Session folder permissions are 777. Using --session-save=db seems to clear it up.

Fixed a nginx/php-fpm permissions conflict. Running all green now.

[dccampbell]

In case this helps anybody w/ testing, I've made my Vagrant setup available:
https://github.com/dccampbell/php7dev-magento2

Tested smooth on Ubuntu14 and Win7 hosts. So far no issues to report, though I'm holding out for a new sample data version that's usable with the current develop branch to really test it hard.