Reads JSON from stdin and outputs valid code for PHP array.
$ echo "[{}, {\"x\": 123, \"name\": \"John\", \"age\": 20}, {\"age\": 30, \"name\": \"Frank\"} ]" | ./jsonphp
[
[
],
[
'age' => 20,
'name' => 'John',
'id' => 123,
],
[
'age' => 30,
'name' => 'Frank',
],
]