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<?php class Foo implements JsonSerializable { private $foo = 1; private $serializer; public function setSerializer(Closure $serializer) { $this->serializer = $serializer; } public function jsonSerialize() { if (method_exists($this->serializer, 'call')) { return $this->serializer->call($this); } return call_user_func($this->serializer->bindTo($this, $this)); } } class Serializer { public function formatThisWay() { return function() { return $this->foo * 10; }; } public function formatThatWay() { return function() { return ['foo' => $this->foo * 10]; }; } } $foo = new Foo; $serializer = new Serializer; $foo->setSerializer($serializer->formatThisWay()); echo json_encode($foo); $foo->setSerializer($serializer->formatThatWay()); echo json_encode($foo);
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Deprecated: Return type of Foo::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/DBFJT on line 13 10{"foo":10}
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.30, 7.0.0 - 7.0.30, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
10{"foo":10}
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/DBFJT on line 34
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/DBFJT on line 26
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/DBFJT on line 26
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/DBFJT on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting '{' in /in/DBFJT on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/DBFJT on line 3
Process exited with code 255.
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