imagecolortransparent() cannot return null

Merge branch 'PHP-8.0'

* PHP-8.0:
Return bool from imageinterlace()

Return bool from imageinterlace()

The function accepts a bool since PHP 8.0, so it should also return
a bool to keep things consistent.

Furthermore a null return from this funct

Return bool from imageinterlace()

The function accepts a bool since PHP 8.0, so it should also return
a bool to keep things consistent.

Furthermore a null return from this functions is not possible.

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Improve class entry generation

Related to GH-6701

Merge branch 'PHP-8.0'

* PHP-8.0:
Properly check imagegd() signature
Make imagegd $file parameter nullable

Make imagegd $file parameter nullable

It is explicitly documented to be nullable, and this matches other
functions like imagepng. It is also documented to accept a stream,
which it c

Make imagegd $file parameter nullable

It is explicitly documented to be nullable, and this matches other
functions like imagepng. It is also documented to accept a stream,
which it currently does not...

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Implicitly enable function entry generation when class entry generation is enabled

Closes GH-6675

Generate class entries from stubs for another batch of extensions

Closes GH-6669

Convert gdFont from resource to object

Update ext/gd parameter names

Closes GH-6308.

Fix UNKNOWN default values in various extensions

Closes GH-6075

Add all the missing parameter types to stubs

Closes GH-5955

Add a few missing parameter types in stubs

Related to GH-5627

Fix UNKNOWN default values in ext/mbstring and ext/gd

Closes GH-5598

Explode _php_image_output_ctx() into multiple functions

Closes GH-5844

Include stub hash in generated arginfo files

The hash is used to check whether the arginfo file needs to be
regenerated. PHP-Parser will only be downloaded if this is actually
necess

Include stub hash in generated arginfo files

The hash is used to check whether the arginfo file needs to be
regenerated. PHP-Parser will only be downloaded if this is actually
necessary.

This ensures that release artifacts will never try to regenerate
stubs and thus fetch PHP-Parser, as long as you do not modify any
files.

Closes GH-5739.

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Lowercase NULL to null in stubs

Store default parameter values of internal functions in arg info

Closes GH-5353. From now on, PHP will have reflection information
about default values of parameters of internal function

Store default parameter values of internal functions in arg info

Closes GH-5353. From now on, PHP will have reflection information
about default values of parameters of internal functions.

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

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Generate functions entries from stubs for another set of extensions

Closes GH-5351

Verify that all stubs have a return type

Add imagegetinterpolation()

While `imagesetinterpolation()` is available as of PHP 5.5.0,
there is no according getter function, so users would have to track the
current interpolatio

Add imagegetinterpolation()

While `imagesetinterpolation()` is available as of PHP 5.5.0,
there is no according getter function, so users would have to track the
current interpolation method manually.

To remedy this, we introduce `imagegetinterpolation()` as thin wrapper
for `gdImageGetInterpolationMethod()` (which has been introduced with
libgd 2.1.1), and use `im->interpolation_id` as fallback for older
libgd. Since our bundled libgd does not yet have this function, we add
it.

We also simplify the recently introduced bug79068.phpt, where it is
sufficient to check that the interpolation method has not been changed.

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Regenerate stubs

Looks like these GD changes got lost along the way...

Add union return types with one class

Make the $num_points parameter of php_imagepolygon optional

That parameter is mostly useless in practise, and likely has been
directly ported from the underlying `gdImagePolygon()` and f

Make the $num_points parameter of php_imagepolygon optional

That parameter is mostly useless in practise, and likely has been
directly ported from the underlying `gdImagePolygon()` and friends,
which require that parameter since the number of elements of the point
array would otherwise be unknown. Typical usages of `imagepolygon()`,
`imageopenpolygon()` and `imagefilledpolygon()` pass `count($points)/2`
or hard-code this value as literal. Since explicitly specifying this
parameter is annoying and error-prone, we offer the possibility to omit
it, in which case the `$points` array must have an even number of
elements, and the number of points is calculated as `count($points)/2`.

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Add union return types for function stubs