Fixed PHP 8.1 deprecation warning

[berrnd]

Hi, and first thanks a lot for this library!

I've noticed another deprecation warning (ref #280) when upgrading to PHP 8.1 and fixed that here.

Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated

[oscarotero]

thanks!

[Smileatmaxi]

Hello There!
Have you planned to release 4.8.9 any time soon? would be awesome I could really use that fix.

Thanks ins advance!

[oscarotero]

@Smileatmaxi Sorry, I completely forgot that.
I just released a new version.

[Smileatmaxi]

@oscarotero No problem, Thank you!

[Smileatmaxi]

@oscarotero Im back, could it be possible that you have burnt that 4.8.9 branch because I think you have tagged it wrong and now 5.7.0 has landed and destroyed everything.

[oscarotero]

@Smileatmaxi Opps. sorry!
I just released 4.8.10 pointing to the correct branch.

[Smileatmaxi]

Awesome Thank you!

[swissspidy]

@oscarotero Gettext v4 supports PHP 5.4+ but this change here added the null coalescing operator to the v4 code base, which was only added in PHP 7.0. I fear that a new 4.8.11 release is needed that uses isset($value) ? $value : '' instead.

[oscarotero]

@swissspidy Thanks for the heads up. I just released 4.8.11 with the proposed change.