From 88d61717dea2609ba0f358c87c0d540cfc3ec10a Mon Sep 17 00:00:00 2001
From: Michael Wallner <mike@php.net>
Date: Wed, 13 May 2020 14:25:56 +0200
Subject: [PATCH] fix #1: Segfault on PHP 7.4 with empty array

closes #2
---
 php_json_post.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/php_json_post.c b/php_json_post.c
index d9b7295..c2e5ba6 100644
--- a/php_json_post.c
+++ b/php_json_post.c
@@ -68,8 +68,13 @@ static SAPI_POST_HANDLER_FUNC(php_json_post_handler)
 			switch (Z_TYPE(tmp)) {
 			case IS_OBJECT:
 			case IS_ARRAY:
-				zval_dtor(arg);
-				ZVAL_COPY_VALUE(&PG(http_globals)[TRACK_VARS_POST], &tmp);
+				if (zend_hash_num_elements(HASH_OF(&tmp))) {
+					zval_dtor(arg);
+					ZVAL_COPY_VALUE(&PG(http_globals)[TRACK_VARS_POST], &tmp);
+				} else {
+					/* PHP-7.4 optimizes empty array */
+					zval_ptr_dtor(&tmp);
+				}
 				break;
 			default:
 				break;
-- 
2.30.2