use null coalesce to suppress deprecation notice in php 8.1

[munkiepus]

Signed-off-by: Tony Dunlop tony.dunlop@fisss.org

spotted a deprecation notice when running unit test with php 8.1

addresses the following:

RuntimeException: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated on line 726 in file /vendor/codeigniter/framework/system/core/Common.php

[munkiepus]

hmm, just noticed the tests failed for php 5.x, is that still supported? might need to change the null coalesce for a ternary if is?

[gxgpet]

Hello!
Yes, we still aim at maintaining compatibility with PHP 5. But no worries, if we find there's a bug that we should handle, we can ensure that $str is a string in other ways.

The only way that this would happen is that either you are passing NULL as the value of $str, or that over that iteration, $str gets nulled by preg_replace() call.

Could you please share an example of how we could reproduce this?