Laravel error after changing php version

Question

I just setup php 7.0.27 in both webserver and cli. My laravel project was working just fine before in php 7.2. When I try run command php artisan serve it shows an error:

PHP Parse error:  syntax error, unexpected '?', expecting variable 
(T_VARIABLE) in /var/www/html/pmanager/pmanager/vendor/symfony/console
/Output/Output.php on line 40

I followed this github discussion which says that the solution is installing same versions in cli and webserver, which, in my case is fine. I have 7.0.27 in both.

Another thing they are pointing it out is laravel shows this error with php 7.0. I cannot change my php version to 7.1 or 7.2 because I must stick with it so as to run magento 2.1 projects.

Any help without changing php version would be highly appreciated.

Have you removed the vendor dir and re installed dependencies? The latest symfony console requires PHP >= 7.1.3 so dependencies might not be compatible anymore — JimL
– JimL, Commented Mar 6, 2018 at 6:01
That might be the problem, you have installed the dependencies on PHP 7.2 so you are probably using dependencies that are not compatible with PHP < 7.2 — JimL
– JimL, Commented Mar 6, 2018 at 8:58
Is there any way I could fix this without starting again with empty project? — Purushotam Sangroula
– Purushotam Sangroula, Commented Mar 6, 2018 at 9:38

francis ngangue · Accepted Answer · 2018-07-26 12:28:58Z

1

you can downgrade your laravel 5.6 project to 5.5!!

Changing the value of the Laravel version inside the composer.json file to the laravel 5.5.

Delete /vendor folder and run composer install

answered Jul 26, 2018 at 12:28

francis ngangue

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