Codeigniter form validation rules cheat sheet Tag
Meaning
required
Returns true if value is empty else false.
is_unique
Returns true if the value is unique else false..
min_length
Return true if the length of the value is greater than the specific count else false.
max_length
Return true if the length of the value is less than the specific count else false.
exact_length
Return true if the length of the value is exactly the same as the specific count else false.
greater_than
Returns true if the value is greater than the specific value else false.
greater_than_equal_to
Returns true if the value is greater than or equal to the specific value else false.
less_than
Returns true if the value is less than the specific value else false.
less_than_equal_to
Returns true if the value is less than or equal to the specific value else false.
in_list
Returns true if the value exists in a predetermined list else false.
alpha_numeric
Returns true if the value is alphanumeric else false.
valid_url
Returns true if the value is in valid URL format or else false.
valid_email
Returns true if the value is in valid email format or else false.