Generating and validating web forms with pear htmlquickform
Most current web browsers support these features and handle input validation.
Also, HTML5 validation helps users inputting data by providing specific controls, such as date pickers and custom on-screen keyboards.
If your web browser supports HTML5, it will not allow you to submit the form without entering text into the input field.
Instead, it will display a message that is generated by the web browser itself.
Depending on your web browser, the “Range” input field will be displayed as a slider control to help users provide input more easily.
Similarly, the “Number” input field may be displayed with buttons to increase or decrease the number incrementally.
This is useful for specific types of data patterns such as telephone numbers, postal codes, and serial numbers.
There are certain validation rules that are automatically applied to fields of with certain characteristics.
Also, the attribute can be added to form controls, to programmatically indicate that they are required.
Most current web browsers support this attribute and will communicate missing required input to the user, using standard web browser dialog mechanisms.
The required pattern consists of one to three letters (for the city where the car is registered), followed by a space, two to four random letters, another space, then one to four random numbers.
Validation should aim to be as accommodating as possible of different forms of input for particular data types.