Fix PHP 7.0 / 7.1

ChangeLog.md

@@ -3,6 +3,12 @@ JSON for the XP Framework ChangeLog
 
 ## ?.?.? / ????-??-??
 
+## 5.0.1 / 2021-10-21
+
+* Fixed PHP 7.0 and 7.1 compatibility: *Call to undefined function
+  spl_object_id()*, see https://www.php.net/spl_object_id
+  (@thekid)
+
 ## 5.0.0 / 2021-10-21
 
 * Made compatible with PHP 8.1 - add `ReturnTypeWillChange` attributes to

src/main/php/text/json/Format.class.php

@@ -135,7 +135,7 @@ public function representationOf($value) {
   public function toString() { return nameof($this); }
 
   /** @return string */
-  public function hashCode() { return spl_object_id($this); }
+  public function hashCode() { return spl_object_hash($this); }
 
   /**
    * Comparison

src/test/php/text/json/unittest/FormatTest.class.php

@@ -18,6 +18,11 @@ public function string() {
     $this->assertEquals('"Test"', $this->format()->representationOf('Test'));
   }
 
+  #[Test]
+  public function hash_code() {
+    $this->assertNotEquals('', $this->format()->hashCode());
+  }
+
   #[Test]
   public function slash_is_escaped_per_default() {
     $this->assertEquals('"xp-framework\/core"', $this->format()->representationOf('xp-framework/core'));