Upgrading from 1.6.16 to latest version. PHP issue

[hank22]

Hello,

I currently using PS 1.6.1.6 and I uploaded the newest Prestashop software to a sub folder on my site. Current PHP is 7.0. Once I change PHP to 7.1 I can no longer access my website and get Error 500. How can I get 1.6.1.6 to work with PHP 7.1 ?

Thank You   

[joseantgv]

 

[Rhobur]

it is not PHP fault or Prestashop's itself it is the fact that you have some modules (or modifications) using obsolete PHP 5.+ code.

Enable Debug as @joseantgv said and you'll be able to see who's causing the issue(s); if a module disable it.

[hank22]

Ok, thanks. Here is what I am seeing below:

"PHP Fatal error:  Uncaught Error: [] operator not supported for strings in /home/**/public_html/classes/db/DbQuery.php:96
Stack trace:
#0 /home/**/public_html/Adapter/Adapter_EntityMapper.php(45): DbQueryCore->from('shop', 'a')
#1 /home/**/public_html/classes/ObjectModel.php(233): Adapter_EntityMapper->load('1', NULL, Object(Shop), Array, NULL, true)
#2 /home/**/public_html/classes/shop/Shop.php(131): ObjectModelCore->__construct('1', NULL, NULL)
#3 /home/**/public_html/classes/shop/Shop.php(397): ShopCore->__construct('1')
#4 /home/**/public_html/config/config.inc.php(114): ShopCore::initialize()
#5 /home/**/public_html/index.php(27): require('/home/**/...')
#6 {main}
  thrown in /home/**/public_html/classes/db/DbQuery.php on line 96"

Edited February 7, 2021 by hank22 (see edit history)

[Rhobur]

Yeah... a PHP 7.1 issue, a fix is described here, https://stackoverflow.com/questions/41000714/php7-1-fatal-error-operator-not-supported-for-strings

[joseantgv]

https://devdocs.prestashop.com/1.7/basics/installation/system-requirements/#php-compatibility-chart

[hank22]

@ Rhobur Looking at the fix you linked to what would I need to do? I'm not sure what the steps I need to follow. Sorry, I have limited tech experience in this field. 

Thanks,

Mike

[Rhobur]

I am not sure what the code is there but assuming you have something like $blabla[] = 'some string here', the $blabla variable is not declared as an array.

So you might try adding just above the line in question (#95) so on #94 an array initialization: 

$blabla = array();

and see if it is working.

[joseantgv]

I'm afraid you should downgrade your PHP to 5.6 or upgrade PS version to 1.6.1.24.