Chapter 3. Moodle Forms Validation

In this chapter, we will cover:

• Adding a required field

• Adding a field with a maximum length

• Adding a field with a minimum length

• Adding a field length within a specified range

• Adding a valid e-mail address field

• Adding custom validation with a Regular Expression

• Adding a field that accepts only alphabetic characters

• Adding a field that accepts only alphanumeric characters

• Adding a field that accepts only numeric characters

• Rejecting punctuation characters

• Rejecting input without a leading zero

• Comparing with another field

• Adding a custom JavaScript validation function callback