Validation Rules Reference

$this->validation->set_rules('email', 'email address', 'required');

The [label] field is required.

$this->validation->set_rules('age', 'age', 'numeric');

The [label] field must be numeric.

$this->validation->set_rules('quantity', 'quantity', 'integer');

The [label] field must be an integer.

$this->validation->set_rules('price', 'price', 'decimal');

The [label] field must be a decimal number.

$this->validation->set_rules('email', 'email address', 'valid_email');

The [label] field must contain a valid email address.

$this->validation->set_rules('website', 'website', 'valid_url');

The [label] field must contain a valid URL.

$this->validation->set_rules('ip_address', 'IP address', 'valid_ip');

The [label] field must contain a valid IP address.

$this->validation->set_rules('birth_date', 'birth date', 'valid_date');

The [label] field must be a valid date in YYYY-MM-DD format.

$this->validation->set_rules('meeting_time', 'meeting time', 'valid_time');

The [label] field must be a valid time in HH:MM or HH:MM:SS format.

$this->validation->set_rules('appointment', 'appointment', 'valid_datetime_local');

The [label] field must be a valid datetime in YYYY-MM-DDTHH:MM format.

$this->validation->set_rules('billing_month', 'billing month', 'valid_month');

The [label] field must be a valid month in YYYY-MM format.

$this->validation->set_rules('work_week', 'work week', 'valid_week');

The [label] field must be a valid week in YYYY-W## format.

$this->validation->set_rules('password', 'password', 'min_length[8]');
$this->validation->set_rules('username', 'username', 'min_length[3]');

The [label] field must be at least [param] characters long.

$this->validation->set_rules('bio', 'biography', 'max_length[500]');
$this->validation->set_rules('city', 'city', 'max_length[50]');

The [label] field cannot exceed [param] characters.

$this->validation->set_rules('postal_code', 'postal code', 'exact_length[5]');
$this->validation->set_rules('zip', 'ZIP code', 'exact_length[5]');

The [label] field must be exactly [param] characters long.

$this->validation->set_rules('age', 'age', 'greater_than[18]');
$this->validation->set_rules('quantity', 'quantity', 'greater_than[0]');

The [label] field must be greater than [param].

$this->validation->set_rules('discount', 'discount', 'less_than[100]');
$this->validation->set_rules('rating', 'rating', 'less_than[5]');

The [label] field must be less than [param].

$this->validation->set_rules('password', 'password', 'required|min_length[8]');
$this->validation->set_rules('confirm_password', 'password confirmation', 'required|matches[password]');

The [label] field must match the [param] field.

$this->validation->set_rules('document', 'document', 'allowed_types[pdf,doc,docx]');
$this->validation->set_rules('resume', 'resume', 'allowed_types[pdf,txt]');

The [label] must be one of the following file types: [param].

$this->validation->set_rules('photo', 'photo', 'max_size[5000]');  // 5MB
$this->validation->set_rules('document', 'document', 'max_size[10000]');  // 10MB

The [label] file size must not exceed [param] KB.

$this->validation->set_rules('video', 'video', 'min_size[100]');  // At least 100KB

The [label] file size must be at least [param] KB.

$this->validation->set_rules('avatar', 'avatar', 'is_image');

The [label] must be a valid image file.

$this->validation->set_rules('banner', 'banner', 'is_image|max_width[1920]');

The [label] image width cannot exceed [param] pixels.

$this->validation->set_rules('thumbnail', 'thumbnail', 'is_image|min_width[200]');

The [label] image width must be at least [param] pixels.

$this->validation->set_rules('banner', 'banner', 'is_image|max_height[600]');

The [label] image height cannot exceed [param] pixels.

$this->validation->set_rules('thumbnail', 'thumbnail', 'is_image|min_height[150]');

The [label] image height must be at least [param] pixels.

$this->validation->set_rules('logo', 'logo', 'is_image|exact_width[200]');

The [label] image width must be exactly [param] pixels.

$this->validation->set_rules('logo', 'logo', 'is_image|exact_height[200]');

The [label] image height must be exactly [param] pixels.

$this->validation->set_rules('profile_pic', 'profile picture', 'is_image|square');

The [label] image must be square (equal width and height).

// Email must be required, valid email format
$this->validation->set_rules('email', 'email address', 'required|valid_email');

// Username must be required, 3-20 characters
$this->validation->set_rules('username', 'username', 'required|min_length[3]|max_length[20]');

// Image must be valid image, square, max 2MB
$this->validation->set_rules('avatar', 'avatar', 'is_image|square|max_size[2000]');

// Password must match confirmation
$this->validation->set_rules('password', 'password', 'required|min_length[8]');
$this->validation->set_rules('confirm_password', 'password confirmation', 'required|matches[password]');

public function submit(): void {
    // Set validation rules
    $this->validation->set_rules('first_name', 'first name', 'required|min_length[2]|max_length[50]');
    $this->validation->set_rules('email', 'email address', 'required|valid_email');
    $this->validation->set_rules('birth_date', 'birth date', 'required|valid_date');
    $this->validation->set_rules('password', 'password', 'required|min_length[8]');
    $this->validation->set_rules('confirm_password', 'password confirmation', 'required|matches[password]');
    $this->validation->set_rules('avatar', 'profile photo', 'is_image|square|max_size[5000]');
    
    // Run validation
    if ($this->validation->run() === true) {
        // All validation passed - process form
        $data = $this->model->get_data_from_post();
        $this->db->insert($data, 'users');
        set_flashdata('Account created successfully');
        redirect('login');
    } else {
        // Validation failed - redisplay form with errors
        $this->create();
    }
}