Number

Integer input - digits with an optional leading minus. It collects an int.

$p->number('weight', 'Basket weight (g)')
  ->min(200)       // Lowest accepted value, inclusive.
  ->max(9000)      // Highest accepted value, inclusive.
  ->step(100)      // Amount the Up/Down keys adjust by.
  ->default(1200); // Initial value.

Runnable script: playground/02-widgets/number.php.

Options

Name	Description	Required	Default
`min()`	Lowest accepted value, inclusive.	No	Unbounded
`max()`	Highest accepted value, inclusive.	No	Unbounded
`step()`	Amount the Up/Down keys adjust by; must be positive.	No	`1`
`default()`	Initial value.	No	`0`

With no bounds declared the field is a plain integer entry and the arrow keys are inert. Declaring min(), max() or step() turns on Up/Down adjustment; the value is clamped only when a range (min() / max()) is set.

Keyboard

Key	Action
digits	Insert a digit
`-`	Leading minus (once, at the start)
`←` / `→`	Move the caret
`↑` / `↓`	Increment / decrement by `step` (only when bounds are set)
`Enter`	Accept (an out-of-range value is rejected inline)
`Esc`	Cancel

Headless behaviour

The bounds are enforced when the form runs headlessly too - a value outside the range is rejected - and surface in the JSON schema as min, max and step on the prompt.