Online PHP editor | output for OoR7D

@ 2016-03-16T01:44:24Z

<?php

class SomeClass implements JsonSerializable {
     public function jsonSerialize() {
        return [get_object_vars($this)];
    }
}

$class = new SomeClass;
var_dump(json_encode($class));
var_dump(json_last_error() == JSON_ERROR_RECURSION);

$arr = [$class];
var_dump(json_encode($arr));
var_dump(json_last_error() == JSON_ERROR_RECURSION);


class SomeOtherClass implements JsonSerializable {
     public function jsonSerialize() {
        return get_object_vars($this);
    }
}

$class = new SomeOtherClass;
var_dump(json_encode($class));
var_dump(json_last_error() == JSON_ERROR_RECURSION);

$arr = [$class];
var_dump(json_encode($arr));
var_dump(json_last_error() == JSON_ERROR_RECURSION);

Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12: Deprecated: Return type of SomeClass::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/OoR7D on line 4 string(4) "[[]]" bool(false) string(6) "[[[]]]" bool(false) Deprecated: Return type of SomeOtherClass::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/OoR7D on line 19 string(2) "[]" bool(false) string(4) "[[]]" bool(false)
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.6 - 7.0.20, 7.1.0 - 7.1.33, 7.2.6 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30: string(4) "[[]]" bool(false) string(6) "[[[]]]" bool(false) string(2) "[]" bool(false) string(4) "[[]]" bool(false)
Output for 7.0.0 - 7.0.5: string(4) "[[]]" bool(false) bool(false) bool(true) string(2) "[]" bool(false) string(4) "[[]]" bool(false)

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