1--TEST-- 2Enum in json_encode 3--FILE-- 4<?php 5 6enum Foo { 7 case Bar; 8} 9 10enum IntFoo: int { 11 case Bar = 0; 12} 13 14enum StringFoo: string { 15 case Bar = 'Bar'; 16} 17 18enum CustomFoo implements JsonSerializable { 19 case Bar; 20 21 public function jsonSerialize(): mixed { 22 return 'Custom ' . $this->name; 23 } 24} 25 26function test($value) { 27 var_dump(json_encode($value)); 28 echo json_last_error_msg() . "\n"; 29 if (json_last_error() !== JSON_ERROR_NONE) { 30 echo json_last_error() . ' === ' . JSON_ERROR_NON_BACKED_ENUM . ":\n"; 31 var_dump(json_last_error() === JSON_ERROR_NON_BACKED_ENUM); 32 } 33 34 try { 35 var_dump(json_encode($value, JSON_THROW_ON_ERROR)); 36 echo json_last_error_msg() . "\n"; 37 } catch (Exception $e) { 38 echo get_class($e) . ': ' . $e->getMessage() . "\n"; 39 } 40} 41 42test(Foo::Bar); 43test(IntFoo::Bar); 44test(StringFoo::Bar); 45test(CustomFoo::Bar); 46 47?> 48--EXPECT-- 49bool(false) 50Non-backed enums have no default serialization 5111 === 11: 52bool(true) 53JsonException: Non-backed enums have no default serialization 54string(1) "0" 55No error 56string(1) "0" 57No error 58string(5) ""Bar"" 59No error 60string(5) ""Bar"" 61No error 62string(12) ""Custom Bar"" 63No error 64string(12) ""Custom Bar"" 65No error 66
