Params Validator element

The goal of the Validator element is to ensure that the user provides the necessary and properly formatted information needed to successfully complete an operation.

The Validator can only be used in combination with other fields:

Available validators:

name	Description
req	Required value.
alpha	Alphabetic value.
alphanum	Alphanumeric value.
dec	Decimal value.
num	Numeric value.
email	E-mail value.
url	URL value.
maxlen	Sets the maximum length allowed.
minlen	Sets the minimum length required.
lt	Less than.
gt	Greater than.
min	Minimum value.
max	Maximum value.
regexp	Regular expression.
plugin	Create your own form validator. More information at Creating your own Form Validator plugin.

Parent:

Basic example

Value required “req”.
Value must be a decimal “dec”.
The maximum length of the decimal value is 6 digits “maxlen”.

<input label="Decimal value" name="decimal">
    <validator type="dec"/>
    <validator type="req"/>
    <validator type="maxlen" parameter="6"/>
</input>

Regular expression

If you want a validation that is not included among these predefined validators, you can use a regular expression. For example, imagine you want to restrict an input to lowercase ASCII values:

<input label="Lowercase value" name="regExp">
    <validator type="regexp" parameter="[a-z]+" />
</input>