Module validation 

Validation utilities

Functions

is_alphanumeric

Check if a string is alphanumeric

is_email

Check if a string is a valid email address

is_numeric

Check if a string is numeric

is_phone

Check if a string is a valid phone number (basic international format)

is_url

Check if a string is a valid URL

length_between

Check if a string is within length bounds

max_length

Check if a string has maximum length

min_length

Check if a string has minimum length