JSON to PHP
Generate typed PHP classes with fromArray() from JSON
Paste JSON or load an example to generate PHP code.
What JSON to PHP generates
JSON to PHP turns an API response or any JSON sample into PHP classes. Constructor promotion writes public typed constructor parameters (PHP 8.0+); the public-properties style writes typed properties and fills them in fromArray(). Required parameters come before optional ones, optional values default to null, and PHPDoc list<Type> annotations describe array items that native types cannot.
How to use
- 1.Paste JSON, upload or drop a .json file, or load one of the examples.
- 2.Set the root class name and an optional namespace such as App\Models.
- 3.Choose the class style and whether to write typed properties and PHPDoc.
- 4.Read the notes, then copy the code or download Models.php. Decode with json_decode($json, true) and call Root::fromArray($data).
How types are inferred
- •Every array item is inspected, not just the first one, and objects in the same array are merged.
- •A key missing from some objects is optional; a key that is sometimes null is nullable. The two are kept apart.
- •1 and 2.5 in the same position widen to a decimal number; other mixes are reported.
- •Empty arrays and values that are only ever null have no type evidence, so a generic type is used and a note explains why.
- •Type mapping: string → string, integer → int, decimal → float, boolean → bool, array → array with list<T> PHPDoc, object → class, null observed → ?T, mixed scalars → union such as string|int, unknown → mixed.
Limits and privacy
A sample shows what the data looked like once, not the full API contract. Review optional fields, generic types and number widths before relying on the code. Input is limited to 5 MB and 256 nesting levels; from 2 MB, generation waits for the Generate button. Everything runs in your browser and the JSON is never uploaded. Integers beyond PHP_INT_MAX are typed mixed, because json_decode turns them into floats unless JSON_BIGINT_AS_STRING is used.
