Declare ext/curl constants in stubs (#9384)

Add new curl_upkeep() function

Generate optimizer func info from stubs for ext/curl, ext/mysqli, ext/pcre (#7407)

Not serializable flag permeation

Remove unnecessary curl version guards in stubs

We have bumped the libcurl requirement to 7.29.0 in PHP 8.1,
but the function declarations in the stubs were still conditional
on the

Remove unnecessary curl version guards in stubs

We have bumped the libcurl requirement to 7.29.0 in PHP 8.1,
but the function declarations in the stubs were still conditional
on the curl version. Drop them to make it more obvious that these
functions are always available.

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Implicitly enable function entry generation when class entry generation is enabled

Closes GH-6675

Generate class entries for a few extensions

Relates to GH-6644

Fix curl_multi_getcontent() parameter name

While the function name starts with curl_multi_*, the function
actually accepts a CurlHandle. As such, it should also use just
$handle as t

Fix curl_multi_getcontent() parameter name

While the function name starts with curl_multi_*, the function
actually accepts a CurlHandle. As such, it should also use just
$handle as the parameter name.

Closes GH-6435.

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Improve parameter names in ext/curl

Closes GH-6155

Fix UNKNOWN default values in ext/curl

Closes GH-5734

Remove the deprecated parameter of curl_version()

Convert CURL resources to objects

Closes GH-5402

Co-authored-by: Nikita Popov <nikita.ppv@gmail.com>

Generate function entries from stubs for a couple of extensions

Closes GH-5347

Add union return types with one class

Add union return types for function stubs

Remove generic type annotations

Cf. <https://github.com/php/php-src/commit/de69a9d3ebad41da9bc7c59f836bb141f0af70f8#r35675846>.

Add Curl ext PHP stubs

Closes GH-4557.