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Stdlib: getimagesize() / getimagesizefromstring() — image metadata (ext/standard/image.c parity) #3271
Description
Category
stdlib
Problem
Zend exposes getimagesize() and getimagesizefromstring() to read width/height/type/mime from image bytes. PurHur/php-compiler has no builtins; both return function_exists(...) === false under bin/vm.php.
php-src reference
- php/php-src
ext/standard/image.c—PHP_FUNCTION(getimagesize),PHP_FUNCTION(getimagesizefromstring) - Uses
php_getimagesize()/php_getimagesize_from_any()
Repro (failure today)
./script/docker-exec.sh -- bash -lc 'source script/php-env.sh
php -r "
\$png = base64_decode(\"iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg==\");
\$path = sys_get_temp_dir() . \"/phpc-img.png\";
file_put_contents(\$path, \$png);
var_export(getimagesize(\$path));
echo PHP_EOL;
var_export(getimagesizefromstring(\$png));
echo PHP_EOL;
@unlink(\$path);
"
php bin/vm.php -r "var_export(function_exists(\"getimagesize\")); echo PHP_EOL;"
'| Runtime | Result |
|---|---|
| Zend | Two arrays: [0]=>1, [1]=>1, 'mime'=>'image/png', … |
| VM | false for function_exists('getimagesize') |
Scope (this repo)
| Area | Files |
|---|---|
| VM | new ext/standard/getimagesize.php, getimagesizefromstring.php (v1: delegate to host GD/fileinfo when available) |
| Registration | ext/standard/Module.php |
| Tests | test/compliance/cases/stdlib/getimagesize_png.phpt |
| Matrix | script/capability-matrix.php |
Document host extension dependency in issue/notes if GD unavailable in Docker image.
Done when
-
getimagesize($path)returns Zend-compatible array for 1×1 PNG repro -
getimagesizefromstring($bytes)same metadata - Optional
$imageinfoby-ref array populated like Zend -
./script/ci-fast.sh --filter getimagesizegreen
Related
- Maintainer probe 2026-05-29: both functions missing on VM
Activity
PurHur commentedon Jun 12, 2026
claim: PHP Compiler STD Lib — starting this run
Add getimagesize()/getimagesizefromstring() with VM/JIT/AOT lowering (#…
PurHur commentedon Jun 12, 2026
Merged via #8239.
Implementation: Native byte-header parser in
ext/standard/VmImage.php(PNG/GIF/JPEG/BMP/WebP); JIT/AOT viaGetimagesizeJitHelpercompile hook (PHP-in-PHP, no host GD, no new C runtime). php-src ref:ext/standard/image.c.Verification:
getimagesize+getimagesizefromstring)vendor/bin/phpunit --filter getimagesize→ OK (6 tests)php bin/compile.php -l test/repro/aot_getimagesize_3271.php→ lint_exit:0