Use json_decode to produce a non-interned string in typeMap test

[GromNaN]

Replace chr(ord('a')).'rray' with json_decode('"array"') to produce a non-interned string that opcache cannot fold, allowing the test to run under all configurations.

[Copilot]

Pull request overview

This PR updates the PHPT test suite to avoid a known failure mode when OPcache is enabled for CLI, which can change string interning behavior and invalidate the assumptions of an existing BSON test.

Changes:

• Add a skip_if_opcache_enabled_cli() helper to centralize OPcache CLI skip logic.
• Update bug1839-005.phpt to skip when opcache.enable_cli=1.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
tests/utils/skipif.php	Adds a reusable skip helper for OPcache CLI affecting string interning/constant folding assumptions.
tests/bson/bug1839-005.phpt	Uses the new skip helper via basic-skipif.inc to prevent false failures when OPcache CLI is enabled.

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[GromNaN]

Updated: replaced chr(ord('a')).'rray' with json_decode('"array"') as suggested. No need to skip the test anymore.

[Copilot]

Pull request overview

Updates a PHPT regression test for PHPC-1839 to reliably generate a non-interned "array" string at runtime, avoiding OPcache constant-folding so the test behaves consistently across configurations.

Changes:

• Replace chr(ord('a')).'rray' string assembly with json_decode('"array"') to ensure a non-interned runtime string.
• Keep typemap references (&$rootValue, &$documentValue) pointing at non-interned strings for the test scenario.

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[alcaeus]

LGTM