(PHP 5 >= 5.4.0, PHP 7)
Specify data which should be serialized to JSON
abstract public mixed JsonSerializable::jsonSerialize ( void )
Serializes the object to a value that can be serialized natively by json_encode().
Returns:
Returns data which can be serialized by json_encode(), which is a value of any type other than a resource.
Examples:
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 ]
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" }
JsonSerializable::jsonSerialize() example returning an integer
<?php class IntegerValue implements JsonSerializable { public function __construct($number) { $this->number = (integer) $number; } public function jsonSerialize() { return $this->number; } } echo json_encode(new IntegerValue(1), JSON_PRETTY_PRINT); ?>
The above example will output:
1
JsonSerializable::jsonSerialize() example returning a string
<?php class StringValue implements JsonSerializable { public function __construct($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!"
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