PHP 8.5 compatibility

[JanJakes]

Adds PHP 8.5 unit tests and fixes PHP 8.5 deprecations:

• Use PDO\SQLite in PHP >= 8.4
• Use PDO\Sqlite::createFunction() instead of deprecated PDO::sqliteCreateFunction()
• Fix ord(): Providing an empty string is deprecated with PHP 8.5

Fixes #234.

[JanJakes]

So @akirk pointed me to shivammathur/setup-php#450, and I added error_reporting=E_ALL, but still no luck. I'll try it locally at some point.

[akirk]

Let's try the other ini file: https://github.com/shivammathur/setup-php/blob/dcffe28928f01999f7fbf89aa197bb72ce81ff61/README.md?plain=1#L439C7-L443

[JanJakes]

@akirk That doesn't seem to help either 🤔

[swissspidy]

PHP 8.5 is released now. Is there any way I can help move this forward?

[JanJakes]

@swissspidy Thanks for the reminder; this PR should be ready now! cc @adamziel

[swissspidy]

Awesome, thanks! Looking forward to the next release then :)

[JanJakes]

@swissspidy Here you go https://github.com/WordPress/sqlite-database-integration/releases/tag/v2.2.15 :)