Use single line phpdoc in stubs where possible

Not serializable flag permeation

Declare tentative return types for ext/intl (#6986)

Make NumberFormatter ctor $pattern nullable

Whether the pattern is needed depends on the used style. If no
pattern is needed, null is a more sensible value than an empty
string.

Make NumberFormatter ctor $pattern nullable

Whether the pattern is needed depends on the used style. If no
pattern is needed, null is a more sensible value than an empty
string.

fixup

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Generate ext/intl class entries from stubs

Closes GH-6670

Improve parameter names in ext/intl

Closes GH-6309

Use ZPP instead of custom type checks

We can add these types as a native type declaration to stubs as a side-effect. Closes GH-6068

Add another round of missing parameter types to stubs

Closes GH-5950

Generate method entries for ext/intl

Closes GH-5370

Do not include the same stub multiple times

Closes GH-5322

Revert "Replace @param annotations with type declarations"

This reverts commit c31029f335ca1b453af799805c43c37e959ad555.

Replace @param annotations with type declarations

Constrain number parameter of numfmt_format to int|float

This is inline with similar changes to the math functions. Especially,
array to number conversion makes no sense here, and is li

Constrain number parameter of numfmt_format to int|float

This is inline with similar changes to the math functions. Especially,
array to number conversion makes no sense here, and is likely to hide
a programming error.

To make that feasible, we introduce the `n` specifier for classic ZPP
so we can stick with `zend_parse_method_parameters()`.

We also remove a test case, which has been degenerated to a ZPP test.

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Add stubs for NumberFormatter

Closes GH-4827