From 746c755d14582f389dc13da31d41416ca9790ea1 Mon Sep 17 00:00:00 2001
From: Ayesh Karunaratne <Ayesh@users.noreply.github.com>
Date: Mon, 13 Feb 2023 10:13:32 +0530
Subject: [PATCH] Use `json_validate` in `Rules\Json` if available (#1394)

[`json_validate` function](https://wiki.php.net/rfc/json_validate)
[added in PHP 8.3](https://php.watch/versions/8.3/json_validate) validates a
given string input to contain valid JSON without decoding it in memory.

This adds a function availability check to `Rules\Json`, and uses the new
function instead of decoding the given input, followed by a last-error check.
---
 library/Rules/Json.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/library/Rules/Json.php b/library/Rules/Json.php
index 1dc5a9e1..0b03fb93 100644
--- a/library/Rules/Json.php
+++ b/library/Rules/Json.php
@@ -36,6 +36,10 @@ final class Json extends AbstractRule
             return false;
         }
 
+        if (function_exists('json_validate')) {
+            return json_validate($input);
+        }
+
         json_decode($input);
 
         return json_last_error() === JSON_ERROR_NONE;