Allow number_format to be only passed 3 arguments

Closes GH-5977

Add more argument types to stubs

Closes GH-5943

Remove proto comments from C files

Closes GH-5758

Constify char * arguments of APIs

Closes GH-5676.

Improve a last couple of argument error messages

Closes GH-5404

Improve argument error messages in ext/standard

Closes GH-5198

Use RETURN_THROWS() after try_convert_to_string()

Use RETURN_THROWS() after zend_throw_exception() in most of the extensions

Use RETURN_THROWS() when an exception is thrown

Closes GH-5036

Convert zend_parse_parameters_none() to fast ZPP in standard lib

Closes GH-5037

Promote warning to exception in log() function

Remove unnecessary C99 checks for maths functions

Add Z_PARAM_STRING/ARRAY_OR_NULL convenience macros

Promote base_convert "invalid base" errors to ValueError

Expect number argument in round()

Fix miscellaneous typos in docs and error messages

Closes GH-4863.

Add fdiv() function

The fdiv() function is part of the fmod() / intdiv() family. It
implements a floating-point division with IEEE-754 semantics.
That is, division by zero is conside

Add fdiv() function

The fdiv() function is part of the fmod() / intdiv() family. It
implements a floating-point division with IEEE-754 semantics.
That is, division by zero is considered well-defined and does not
trigger any kind of diagnostic. Instead one of INF, -INF or NAN
will be returned, depending on the case.

This is in preparation for throwing DivisionByZeroError from the
standard division operator.

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Add missing zend_parse_parameters_none() checks

Closes GH-4796.

Remove mention of PHP major version in Copyright headers

Closes GH-4732.

Merge branch 'PHP-7.4'

Deprecate passing invalid character to base_convert etc

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

Merge branch 'PHP-7.4'

Avoid more UB in round()

Fix _php_math_round UB

php_intlog10abs() is ill-defined for a zero value. Avoid calling it
altogether as there's nothing to round with a zero value.

Merge branch 'PHP-7.4'