PHP 8.1: Implement __serialize() and __unserialize()

[Jan-E]

The extension builds fine with PHP 8.1 (Windows, VS16) but issues several warnings when running the tests:

Deprecated: The Serializable interface is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary)

When I ran the tests and suppressed E_DEPRECATED the results were the same as under PHP 8,.0, except for the test that explicitely tested for client deprecated methods:
https://github.com/m6w6/ext-http/blob/master/tests/client024.phpt

This test succeeded under PHP 8.0, but failed under PHP 8.1.

[Jan-E]

I know of only one PHP extension that implements the Serializable interface as well as __serialize() and __unserialize(): igbinary. But even in that extension it seems difficult to implement: See
igbinary/igbinary@ddc68d5

I am too unexperienced with Classes in C to give it a shot myself. Anyone else?

[remicollet]

See pr #114 (wip)

[Jan-E]

Ok. I did not see that you were already working on it.