CodeIgniter Form Validation

CodeIgniter library for fields form validation. It is independent of the standard library of CodeIgniter and can also be used for Ajax calls.

###How to install

Add the file Validation.php to your /application/libraries folder.

###How to use

Load library:
```
 $this->load->library('validation');
```

Load data from:

a. POST (default):

 	$this->validation->set_post();

b. GET:

 	$this->validation->set_get();

c. Array data:

 	$this->validation->set_data($data);

Load your rules:
```
 $this->validation->required…
```

####Public functions List

set_data Set fields data from array
set_post Set fields data from POST
set_get Set fields data from GET
get_data Get array data or a single field value (if key passed)
get_error Return error data: message and field (if exists)
get_error_message Return error message
get_error_field Return error field
is_valid Check if form is valid
set_not_valid Set form not valid ad assign message error
required Check required fields
required_isset Check required fields only if is set
email Check if email fields are valid
regexp Check that the fields meet a particular regular expression
url Check URL fields are valid
maxlen Check that fields are not longer than a defined value
minlen Check that fields are not shorter than a defined value
alpha Check that fields do not have characters other than letters of alphabet
alpha_s Check that fields do not have characters other than letters of alphabet and space
num Check that fields do not have characters other than numbers
num_s Check that fields do not have characters other than numbers and space
alphanum Check that fields do not have characters other than letters and numbers
alphanum_s Check that fields do not have characters other than letters of alphabet, numbers and space
no_spaces Check that fields do not have spaces
num_gt Check if a numeric field is greater than a certain value
num_lt Check if a numeric field is less than a certain value
date Check that the fields have a date
date_gt Check that a date is larger than other
date_lt Check that a date is smaller than other
date_en Check that the fields have a English date
datetime Check that the fields have a datetime value
checked Check that the field has been checked
selected Check that the field has been selected
equal Check that the two fields are equal
callback Check the correctness of the field $param through the method $method.

###How to work

public function save() {
	$this->load->library('validation');
	$this->validation->set_data($data);
	// $this->validation->set_post();

	$this->validation->required(array('email', 'username', 'firstname', 'lastname', 'city', 'password'), 'Fields are required'),
		->email('email', 'Email is not valid field')
		->maxlen('username', 32, 'Username cannot be longer than 32 characters')
		->minlen('username', 6, 'Username cannot be shorter than 6 characters')
		->regxp('username', '/^([a-zA-Z0-9\-]*)$/i', 'Username cannot have characters other than letters, numbers and hyphens')
		->callback('_unique', 'Username already exists.', 'username')
		->callback(array($your_model, 'method_name'), 'Error message', array('parameter1', 'parameter2', 'parameter3'))
		->callback('_other_func', 'Your error.');

	if ($this->validation->is_valid()) {
		if ($data['username'] == 'admin')
			$this->validation->set_not_valid('Username is already registered');

	}

	if ($this->validation->is_valid())
		echo 'success!';
	else
		echo $this->validation->get_error_message();
}

public function _unique($key) {
	$value = $this->validation->get_data($key);
	$res = $this->db->query('…');
	return $res->id != 0;
}

public function _other_func() {
	// Check something
	return $error;
}

lumoz/codeigniter-form-validation

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