Regression: gzcompress/gzencode/gzdeflate(..., null) level silent — Zend E_DEPRECATED (ext/zlib/zlib.c)

[PurHur]

Category

Regression: · php-src-strict · zlib null int $level

Problem

gzcompress / gzencode / gzdeflate second argument $level is typed int (default -1). Passing null under non-strict typing must emit E_DEPRECATED and coerce (Zend still compresses). VM silently succeeds with no deprecation.

Closed #28730 / #19332 covered null payload (gzcompress(null)), not null $level.

Repro	Zend 8.2+	VM (2026-08-16)
gzcompress('a', null)	E_DEPRECATED (#2 int) + compressed string	silent compressed string
gzencode('a', null)	same	silent
gzdeflate('a', null)	same	silent

php-src reference

• php/php-src ext/zlib/zlib.c — PHP_FUNCTION(gzcompress|gzencode|gzdeflate)
• php/php-src ext/zlib/zlib.stub.php — int $level = -1

PHP implementation target

• ext/zlib/ PHP builtins / JIT helpers — shared int null DEP+coerce (default -1) before encode
• No new runtime/*.c

Repro

./script/docker-exec.sh -- bash -lc 'php test/repro/maintainer_gap_gz_null_level.php'
./script/docker-exec.sh -- bash -lc 'php bin/vm.php test/repro/maintainer_gap_gz_null_level.php'

Done when

• All three: Zend-identical E_DEPRECATED text; result still compresses
• strict_types=1: TypeError for null $level
• Targeted compliance/PHPUnit guard
• php-src-strict; no php-compiler-strict shortcut

[PurHur]

Maintainer note: repro scripts live at test/repro/maintainer_gap_*.php in the filing workspace; if missing on a fresh checkout, recreate from the Problem table / Repro section (Zend 8.2.32 vs php bin/vm.php via ./script/docker-exec.sh). php-src-strict Done-when.

[PurHur]

claim: worker-lane-c — starting this run

Lane C (#31445 % 3 == 2). Fixing null $level E_DEPRECATED + coerce for gzcompress/gzencode/gzdeflate (php-src-strict). Branch agent/issue-31445-gz-null-level.

[PurHur]

merged via #31467

Verification (php-src-strict):

• php bin/vm.php / php bin/jit.php test/repro/maintainer_gap_gz_null_level.php — Zend-identical E_DEPRECATED + compress OK for gzcompress/gzencode/gzdeflate
• strict_types TypeError preserved
• ./script/phpunit.sh --filter 'Issue31445GzNullLevelTest|GzNullLevelSoft' — OK (6 tests)