Fix tests for earlier PHP versions

Author: Riimu

README.md

@@ -241,6 +241,16 @@ apply to following calls.
     Maximum number of levels when encoding arrays and objects. Exception is
     thrown when the maximum is exceeded. Set to `false` to have no limit.
 
+## Known Issues ##
+
+If you are running this library on a PHP version earlier than 5.4.5, you may
+receive the following error, if you are trying to encode a recursive array:
+
+`Fatal error:  Nesting level too deep - recursive dependency?`
+
+In order to fix this, it is recommended to disable `recursion.detect` and set
+a max value for `recursion.max` if you expect to encounter recursive arrays.
+
 ## Credits ##
 
 This library is copyright 2013 - 2015 to Riikka Kalliomäki.

tests/tests/EncodingTest.php

@@ -96,7 +96,14 @@ public function testFloatExponents()
     public function testPHPDefaultPrecision()
     {
         $float = 1.12345678901234567890;
+
+        $cast = ini_set('precision', 17);
+        $serialize = ini_set('serialize_precision', 17);
+
         $this->assertEncode(var_export($float, true), $float, ['float.precision' => false]);
+
+        ini_set('precision', $cast);
+        ini_set('serialize_precision', $serialize);
     }
 
     public function testInfiniteFloat()
@@ -249,6 +256,10 @@ public function testUnknownType()
 
     public function testArrayRecursion()
     {
+        if (version_compare(PHP_VERSION, '5.4.5', '<')) {
+            $this->markTestSkipped();
+        }
+
         $foo = [1];
         $foo[1] = & $foo;
 
@@ -258,6 +269,10 @@ public function testArrayRecursion()
 
     public function testIgnoredArrayRecursion()
     {
+        if (version_compare(PHP_VERSION, '5.4.5', '<')) {
+            $this->markTestSkipped();
+        }
+
         $foo = [1];
         $foo[1] = & $foo;