JsonSerializable::jsonSerialize
(PHP 5 >= 5.4.0, PHP 7)
JsonSerializable::jsonSerialize — Specify data which should be serialized to JSON
Description
abstract public mixed JsonSerializable::jsonSerialize ( void )Serializes the object to a value that can be serialized natively by json_encode().
Parameters
This function has no parameters.
Return Values
Returns data which can be serialized by json_encode(), which is a value of any type other than a resource.
Examples
Example #1 JsonSerializable::jsonSerialize() example returning an array
<?php
class?ArrayValue?implements?JsonSerializable?{
????public?function?__construct(array?$array)?{
????????$this->array?=?$array;
????}
????public?function?jsonSerialize()?{
????????return?$this->array;
????}
}
$array?=?[1,?2,?3];
echo?json_encode(new?ArrayValue($array),?JSON_PRETTY_PRINT);
?>The above example will output:
[
1,
2,
3
]Example #2 JsonSerializable::jsonSerialize() example returning an associative array
<?php
class?ArrayValue?implements?JsonSerializable?{
????public?function?__construct(array?$array)?{
????????$this->array?=?$array;
????}
????public?function?jsonSerialize()?{
????????return?$this->array;
????}
}
$array?=?['foo'?=>?'bar',?'quux'?=>?'baz'];
echo?json_encode(new?ArrayValue($array),?JSON_PRETTY_PRINT);
?>The above example will output:
{
"foo": "bar",
"quux": "baz"
}Example #3 JsonSerializable::jsonSerialize() example returning an integer
<?php
class?IntegerValue?implements?JsonSerializable?{
????public?function?__construct($number)?{
????????$this->number?=?(integer)?$number;
????}
????public?function?jsonSerialize()?{
????????return?$this->number;
????}
}
echo?json_encode(new?IntegerValue(1),?JSON_PRETTY_PRINT);
?>The above example will output:
1Example #4 JsonSerializable::jsonSerialize() example returning a string
<?php
class?StringValue?implements?JsonSerializable?{
????public?function?__construct($string)?{
????????$this->string?=?(string)?$string;
????}
????public?function?jsonSerialize()?{
????????return?$this->string;
????}
}
echo?json_encode(new?StringValue('Hello!'),?JSON_PRETTY_PRINT);
?>The above example will output:
"Hello!"← JsonSerializable
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