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<?php class StringValue implements JsonSerializable { public function __construct($string) { $this->string = (string) $string; } public function jsonSerialize() { return $this; } } echo json_encode(new StringValue('Hello!'), JSON_PRETTY_PRINT);
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of StringValue::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/1WuTJ on line 8 Deprecated: Creation of dynamic property StringValue::$string is deprecated in /in/1WuTJ on line 5 { "string": "Hello!" }

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