Various ext/spl stub fixes

Closes GH-7215

Allow build/gen_stub.php to process multiple CLI file args (#7179)

E.g. `build/gen_stub.php *.stub.php` will generate `*_arginfo.h`
from multiple files.

Previously, gen_stub.php

Allow build/gen_stub.php to process multiple CLI file args (#7179)

E.g. `build/gen_stub.php *.stub.php` will generate `*_arginfo.h`
from multiple files.

Previously, gen_stub.php would silently ignore files after the first file.

Invoking gen_stub.php with no arguments will continue to process the entire
directory.

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Add support for tentative return types of internal methods

RFC: https://wiki.php.net/rfc/internal_method_return_types

Closses GH-6971

Add support for generating properties with union type of multiple classes

Closes GH-6701

Generate class entries from stubs for ldap, libxml, mbstring and mysqli

Closes GH-6684

Improve class entry generation

Related to GH-6701

Implicitly enable function entry generation when class entry generation is enabled

Closes GH-6675

Properly render 2+ namespaces functions in build/gen_stub.php

Affects ZEND_NS_FE

Add test cases of the global function

Backported to php 8.0 from GH-6664

Properly render 2+ namespaces functions in build/gen_stub.php

Affects both INIT_NS_CLASS_ENTRY and ZEND_NS_FE

Add test cases of the global function and namespaced values

Cl

Properly render 2+ namespaces functions in build/gen_stub.php

Affects both INIT_NS_CLASS_ENTRY and ZEND_NS_FE

Add test cases of the global function and namespaced values

Closes GH-6664

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Add support for generating class entries from stubs

Closes GH-6289

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

gen_stub: Also verify implementation-alias

This makes --verify also check @implementation-alias. Failures are
ignored using @no-verify instead. Some mistakes have been made that
woul

gen_stub: Also verify implementation-alias

This makes --verify also check @implementation-alias. Failures are
ignored using @no-verify instead. Some mistakes have been made that
would have been caught by this...

Closes GH-6615.

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gen_stub: Don't use $aliasMap during verification

Some functions have multiple aliases, while the $aliasMap can
only record one.

Methodsynopsis generation probably shouldn't use

gen_stub: Don't use $aliasMap during verification

Some functions have multiple aliases, while the $aliasMap can
only record one.

Methodsynopsis generation probably shouldn't use it either, but
at least that case seems to only be interested in whether there
is an alias at all.

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gen_stub: Compare phpdoc return type in --verify

gen_stub: Allow additional text after @return

In case the stub file also contains documentation.

gen_stub: Automatically add function name to exceptions

This makes sure that it's present even on exceptions from deeper
down the stack, where we can't add it manually.

Add support for union types for internal functions

This closes the last hole in the supported types for internal
function arginfo types. It's now possible to represent unions of
mult

Add support for union types for internal functions

This closes the last hole in the supported types for internal
function arginfo types. It's now possible to represent unions of
multiple classes. This is done by storing them as TypeA|TypeB and
PHP will then convert this into an appropriate union type list.

Closes GH-6581.

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Fix refentry attribute replacing

Add support for generating methodsynopses from stubs

Closes GH-6367

Fix parameter stats generation

[ci skip]

Require stubs to declare return types for magic methods when possible

Closes GH-6376

Verify parameter names of function aliases

Closes GH-6335

Avoid namespaced class symbol clashes in gen_stub

Add the namespace prefix (using underscores) to both the arginfo
name and the method declaration name.

Support "static" type in gen_stub

Add @generate-legacy-arginfo tag

Improve gen_stub.php - drop --legacy option, generate file is exists - add --help option - add debug "Saved ..." message