Align array_diff* functions to official PHP behavior

[alganet]

No description provided.

[Copilot]

Pull request overview

This PR updates PH7’s array_diff* family to more closely mirror official PHP behavior, primarily around argument validation/error reporting and diff semantics, and adds PHPT coverage to lock the behavior in.

Changes:

• Add PHPT integration tests asserting PHP-like ArgumentCountError / TypeError messages for array_diff, array_diff_assoc, array_diff_key, and array_diff_uassoc.
• Add smoke tests for multi-array diff behavior and “return input unchanged” cases.
• Update src/ph7/hashmap.c implementations to throw exceptions on invalid arguments and adjust diff logic for array_diff_assoc / array_diff_uassoc.

Reviewed changes

Copilot reviewed 29 out of 29 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/ph7/hashmap.c	Adds PHP-like argument validation/errors for array diff functions; adjusts diff logic for assoc/uassoc variants.
tests/ph7/002-integration/function/array_diff/array_diff_missing_args.phpt	Verifies ArgumentCountError for array_diff() with no args.
tests/ph7/002-integration/function/array_diff/array_diff_type_error_first.phpt	Verifies TypeError for non-array arg #1 to array_diff().
tests/ph7/002-integration/function/array_diff/array_diff_type_error_second.phpt	Verifies TypeError for non-array arg #2 to array_diff().
tests/ph7/002-integration/function/array_diff_assoc/array_diff_assoc_missing_args.phpt	Verifies ArgumentCountError for array_diff_assoc() with no args.
tests/ph7/002-integration/function/array_diff_assoc/array_diff_assoc_type_error_first.phpt	Verifies TypeError for non-array arg #1 to array_diff_assoc().
tests/ph7/002-integration/function/array_diff_assoc/array_diff_assoc_type_error_second.phpt	Verifies TypeError for non-array arg #2 to array_diff_assoc().
tests/ph7/002-integration/function/array_diff_assoc/array_diff_assoc_type_error_third.phpt	Verifies TypeError for non-array arg #3 to array_diff_assoc().
tests/ph7/002-integration/function/array_diff_key/array_diff_key_missing_args.phpt	Verifies ArgumentCountError for array_diff_key() with no args.
tests/ph7/002-integration/function/array_diff_key/array_diff_key_type_error_first.phpt	Verifies TypeError for non-array arg #1 to array_diff_key().
tests/ph7/002-integration/function/array_diff_key/array_diff_key_type_error_second.phpt	Verifies TypeError for non-array arg #2 to array_diff_key().
tests/ph7/002-integration/function/array_diff_uassoc/array_diff_uassoc_missing_args.phpt	Verifies ArgumentCountError for array_diff_uassoc() with no args.
tests/ph7/002-integration/function/array_diff_uassoc/array_diff_uassoc_type_error_first.phpt	Verifies TypeError for non-array arg #1 to array_diff_uassoc().
tests/ph7/002-integration/function/array_diff_uassoc/array_diff_uassoc_type_error_second.phpt	Verifies TypeError for non-array middle arg to array_diff_uassoc().
tests/ph7/002-integration/function/array_diff_uassoc/array_diff_uassoc_callback_not_array_or_string.phpt	Verifies callback-related TypeError when 2nd arg isn’t array/string (treated as callback).
tests/ph7/002-integration/function/array_diff_uassoc/array_diff_uassoc_callback_array_invalid.phpt	Verifies callback-related TypeError for array callback of wrong shape.
tests/ph7/002-integration/function/array_diff_uassoc/array_diff_uassoc_callback_not_callable.phpt	Verifies callback-related TypeError for non-callable callback argument.
tests/ph7/001-smoke/function/array_diff/array_diff_basic.phpt	Smoke test for basic array_diff behavior preserving keys.
tests/ph7/001-smoke/function/array_diff/array_diff_multiple.phpt	Smoke test for array_diff with more than two arrays.
tests/ph7/001-smoke/function/array_diff_assoc/array_diff_assoc.phpt	Refocuses existing smoke test to array_diff_assoc only.
tests/ph7/001-smoke/function/array_diff_assoc/array_diff_assoc_return_same.phpt	Smoke test: single-arg array_diff_assoc returns input unchanged.
tests/ph7/001-smoke/function/array_diff_assoc/array_diff_assoc_value_mismatch.phpt	Smoke test: same key but different value should be kept.
tests/ph7/001-smoke/function/array_diff_assoc/array_diff_assoc_numeric_keys.phpt	Smoke test: handles integer keys correctly.
tests/ph7/001-smoke/function/array_diff_assoc/array_diff_assoc_multiple_arrays.phpt	Smoke test: supports diffing against multiple arrays.
tests/ph7/001-smoke/function/array_diff_key/array_diff_key_return_same.phpt	Smoke test: single-arg array_diff_key returns input unchanged.
tests/ph7/001-smoke/function/array_diff_key/array_diff_key_numeric_keys.phpt	Smoke test: compares integer keys ignoring values.
tests/ph7/001-smoke/function/array_diff_key/array_diff_key_multiple_arrays.phpt	Smoke test: supports diffing keys across multiple arrays.
tests/ph7/001-smoke/function/array_diff_uassoc/array_diff_uassoc_return_same.phpt	Smoke test: two-arg array_diff_uassoc (array + callback) returns input unchanged.
tests/ph7/001-smoke/function/array_diff_uassoc/array_diff_uassoc_multiple_arrays.phpt	Smoke test: array_diff_uassoc with multiple arrays + callback.

[Copilot]

Same issue as above: int keep = 1; is declared after statements inside the loop body, which is invalid in C89/C90. Declare keep at the beginning of the enclosing block (or introduce a new scope) to preserve C89 compatibility.

[github-actions]

Coverage

Total	Rate	Hit/Total
Lines	77.36%	23944/30951
Functions	96.75%	1279/1322

Details: https://github.com/alganet/PHL/actions/runs/22432386383