Fix similar_text() strict call-site TypeError on int operands (#9519)

[PurHur]

Summary

• Route similar_text() VM/JIT string operands through InternalStrictArg::requireString when the caller has declare(strict_types=1), matching php-src ext/standard/string.c Z_PARAM_STR parity (same pattern as levenshtein()).
• Non-strict call sites still coerce int/float scalars to string.
• Add VM/JIT compliance guards for strict int operand TypeError.

php-src reference

• ext/standard/string.c — PHP_FUNCTION(similar_text)

Verification

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh
php test/repro/issue_4543_similar_text.php
php bin/vm.php test/repro/issue_4543_similar_text.php
'
# Zend + VM: TypeError + false (percent path still works)

./vendor/bin/phpunit test/compliance/SimilarTextVMTest.php test/compliance/SimilarTextJITTest.php
# OK (9 tests)

./vendor/bin/phpunit test/aot/AotTest.php --filter similar_text
# OK (1 test)

Closes #9519

Made with Cursor