Check string bounds in strspn/strcspn

strspn/strcspn are string search functions, and as such should throw
ValueError on out-of-bounds offsets, just like strpos etc do.

substr_replace() cannot return false

Add support for `@implementation-alias` in stubs

Closes GH-6170

Change int parameter types to bool when the parameter behaves as bool

Closes GH-6148

Generate arginfos

Display types in stubs more uniformly

In preparation for generating method signatures for the manual.

This change gets rid of bogus false|null return types, a few unnecessary traili

Display types in stubs more uniformly

In preparation for generating method signatures for the manual.

This change gets rid of bogus false|null return types, a few unnecessary trailing backslashes, and settles on using ? when possible for nullable types.

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Promote a few remaining errors in ext/standard

Closes GH-6110

Update array parameter names for named parameters

* The array "subject" of a function gets called $array.

* Further parameters should be self-descriptive if used
as a named pa

Update array parameter names for named parameters

* The array "subject" of a function gets called $array.

* Further parameters should be self-descriptive if used
as a named parameter, and a full word, not an abbreviation.

* If there is a "bunch more arrays" variadic, it gets
called $arrays (because that's what was already there).

* A few functions have a variadic "a bunch more arrays,
and then a callable", and were already called $rest.
I left those as is and died a little inside.

* Any callable provided to an array function that acts
on the array is called $callback. (Nearly all were already,
I just fixed the one or two outliers.)

* array_multisort() is beyond help so I ran screaming.

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Declare array|int and object-of-class|int types in stubs

Closes GH-6081

Co-Authored-By: Nikita Popov <nikic@php.net>

Fix a few stub parameter types in ext/standard

Make array_multisort() signature more variadic

The second and third arguments are not always the sort_order and
sort_flags -- they can also be in reverse order, or be arrays
altogeth

Make array_multisort() signature more variadic

The second and third arguments are not always the sort_order and
sort_flags -- they can also be in reverse order, or be arrays
altogether. Move them into the variadic parameter to avoid awkward
error messages.

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Allow array_diff() and array_intersect() with single array argument

Both of these functions are well-defined when used with a single
array argument -- rejecting this case was an artifici

Allow array_diff() and array_intersect() with single array argument

Both of these functions are well-defined when used with a single
array argument -- rejecting this case was an artificial limitation.
This is not useful when called with explicit arguments, but removes
edge-cases when used with argument unpacking:

// OK even if $excludes is empty.
array_diff($array, ...$excludes);

// OK even if $arrays contains a single array only.
array_intersect(...$arrays);

This matches the behavior of functions like array_merge() and
array_push(), which also allow calls with no array or a single
array respectively.

Closes GH-6097.

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Improve error messages mentioning parameters instead of arguments

Closes GH-5999

Fix UNKNOWN default values in ext/standard

Closes GH-6026

Drop support for crypt() without explicit salt

crypt() without salt generates a weak $1$ MD5 hash. It has been
throwing a notice since 2013 and we provide a much better alternative
i

Drop support for crypt() without explicit salt

crypt() without salt generates a weak $1$ MD5 hash. It has been
throwing a notice since 2013 and we provide a much better alternative
in password_hash() (which can auto-generate salts for strong
password hashes), so keeping this is just a liability.

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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

Fix more basic function stubs

User-defined functions can't have multiple parameters with the same name.
Don't do that for var_dump/debug_zval_dump.

Consistently use array $array

Fix more basic function stubs

User-defined functions can't have multiple parameters with the same name.
Don't do that for var_dump/debug_zval_dump.

Consistently use array $array to match docs

Fix typo in UPGRADING

Fixes GH-6015

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Use ZPP callable check for Windows specific functions

Fix param name in PHPDoc

Add all the missing parameter types to stubs

Closes GH-5955

Rename standard array function parameters to $array

This is targeting 8.0.

`$arg` seems like a poor choice of a name,
especially if the function were to have arguments added.

Rename standard array function parameters to $array

This is targeting 8.0.

`$arg` seems like a poor choice of a name,
especially if the function were to have arguments added.

In many cases, the php.net documentation already has $array for these functions.
E.g. https://www.php.net/manual/en/function.array-intersect.php

I'd assume that since named arguments was added to 8.0 near the feature freeze,
PHP's maintainers had planned to make the names consistent
and gradually use the same name for docs and implementation.

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Add more argument types to stubs

Closes GH-5943

Add a few missing parameter types in stubs

Related to GH-5627

Last pass of 'More consistent parameter names for date/time functions'

Remove null from highlight_* return types

Also fix show_source() discrepancy in func_info.