Interactive playground

Choose an example, edit the sample input, and explore the PHP rule chain in the editor. The editor suggests validator factories after $rules-> or Rule::, then offers fluent constraints after a validator chain such as ->min() or ->requiredIf(). The result panel runs the registration sample shown on this page and mirrors its nested output shape.

Browser playground

Build a rule chain

Choose a recipe, edit the PHP, and inspect the validation result below.

Ready

Ctrl+Space autocomplete

Fynix v3 fluent API PHP example editor

Email Password Company name Address city Validate input

Returned result Copy JSON

What the playground represents

The browser playground mirrors real Fynix rules such as:

$rules->email('email')->max(254);
$rules->password('password')->length(12, 128);
$rules->string('companyName')
    ->optional()
    ->requiredIf('accountType', 'business');

The editor is an interactive documentation aid with autocomplete, not a PHP runtime, so changing its text does not change the sample validation rules. Your application still executes the PHP rules on the server, and ValidationHandler::validate() remains the source of truth.

Try a valid payload

Use these values in the form:

• account type: personal
• email: person@example.com
• password: A-secure-password-123
• company name: leave empty
• city: London

The returned result becomes:

{}