Fix GH-8781 ZipArchive::close deletes zip file without updating stat cache

Author: remicollet

ext/zip/php_zip.c

@@ -1562,6 +1562,9 @@ PHP_METHOD(ZipArchive, close)
 		ze_obj->err_sys = 0;
 	}
 
+	/* clear cache as empty zip are not created but deleted */
+	php_clear_stat_cache(1, ze_obj->filename, ze_obj->filename_len);
+
 	efree(ze_obj->filename);
 	ze_obj->filename = NULL;
 	ze_obj->filename_len = 0;

ext/zip/tests/bug_gh8781.phpt

@@ -0,0 +1,21 @@
+--TEST--
+Bug GH-8781 (ZipArchive deletes zip file with no contents)
+--SKIPIF--
+<?php
+if (!extension_loaded('zip')) die('skip zip extension not available');
+?>
+--FILE--
+<?php
+touch($file = __DIR__ . '/bug_gh8781.zip');
+var_dump(is_file($file));
+
+$zip = new ZipArchive();
+$zip->open($file, ZipArchive::CREATE | ZipArchive::OVERWRITE);
+$zip->close();
+
+var_dump(is_file($file));
+?>
+--EXPECT--
+bool(true)
+bool(false)
+