[php-src] master: zlib: Add test with invalid levels

Author: Gina Peter Banyard (Girgias)
Date: 2026-08-10T19:23:47+01:00

Commit: https://github.com/php/php-src/commit/1cf82bef0a7e3c85b40eff2539ab6c9878dcd872
Raw diff: https://github.com/php/php-src/commit/1cf82bef0a7e3c85b40eff2539ab6c9878dcd872.diff

zlib: Add test with invalid levels

Changed paths:
  A  ext/zlib/tests/zlib_wrapper_level_errors.phpt


Diff:

diff --git a/ext/zlib/tests/zlib_wrapper_level_errors.phpt b/ext/zlib/tests/zlib_wrapper_level_errors.phpt
new file mode 100644
index 000000000000..cc586da568b1
--- /dev/null
+++ b/ext/zlib/tests/zlib_wrapper_level_errors.phpt
@@ -0,0 +1,45 @@
+--TEST--
+compress.zlib:// wrapper with invalid compression level
+--EXTENSIONS--
+zlib
+--SKIPIF--
+<?php
+in_array('compress.zlib', stream_get_wrappers()) || die('skip No zlib wrapper');
+?>
+--FILE--
+<?php declare(strict_types=1);
+
+$filename = tempnam(sys_get_temp_dir(), "php-zlib-test-wrapper-level-error");
+$thisfile = file_get_contents(__FILE__);
+
+function write_at_level(mixed $level) {
+	global $filename, $thisfile;
+
+	$ctx = stream_context_create();
+	stream_context_set_option($ctx, 'zlib', 'level', $level);
+	$fp = fopen("compress.zlib://$filename", 'w', false, $ctx);
+	for ($i = 0; $i < 10; ++$i) {
+		fwrite($fp, $thisfile);
+	}
+	fclose($fp);
+	$size = filesize($filename);
+	unlink($filename);
+	return $size;
+}
+
+$size_string_type = write_at_level("not a number");
+var_dump($size_string_type);
+
+$size_array_type = write_at_level(new stdClass());
+var_dump($size_array_type);
+
+$size_oob = write_at_level(10000);
+var_dump($size_oob);
+
+?>
+--EXPECTF--
+int(%d)
+
+Warning: Object of class stdClass could not be converted to int in %s on line %d
+int(%d)
+int(0)