Fix PHP version check (#30)

Author: vearutop

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [3.7.4] - 2020-01-26
+
+### Fixed
+- PHP version check for empty property name support.
+
 ## [3.7.3] - 2020-01-24
 
 ### Fixed
@@ -35,6 +40,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Compatibility option to `TOLERATE_ASSOCIATIVE_ARRAYS` that mimic JSON objects.
 
+[3.7.4]: https://github.com/swaggest/json-diff/compare/v3.7.3...v3.7.4
 [3.7.3]: https://github.com/swaggest/json-diff/compare/v3.7.2...v3.7.3
 [3.7.2]: https://github.com/swaggest/json-diff/compare/v3.7.1...v3.7.2
 [3.7.1]: https://github.com/swaggest/json-diff/compare/v3.7.0...v3.7.1

src/JsonPointer.php

@@ -104,7 +104,7 @@ public static function add(&$holder, $pathItems, $value, $flags = self::RECURSIV
         $ref = &$holder;
         while (null !== $key = array_shift($pathItems)) {
             if ($ref instanceof \stdClass || is_object($ref)) {
-                if (PHP_VERSION_ID < 71000 && '' === $key) {
+                if (PHP_VERSION_ID < 70100 && '' === $key) {
                     throw new Exception('Empty property name is not supported by PHP <7.1',
                         Exception::EMPTY_PROPERTY_NAME_UNSUPPORTED);
                 }
@@ -202,7 +202,7 @@ public static function get($holder, $pathItems)
         $ref = $holder;
         while (null !== $key = array_shift($pathItems)) {
             if ($ref instanceof \stdClass) {
-                if (PHP_VERSION_ID < 71000 && '' === $key) {
+                if (PHP_VERSION_ID < 70100 && '' === $key) {
                     throw new Exception('Empty property name is not supported by PHP <7.1',
                         Exception::EMPTY_PROPERTY_NAME_UNSUPPORTED);
                 }