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In Helpers files there are set of constant and function that you can use anywhere in the project even in the view. All helpers files are located in app\Helpers directory. If you want to create another helper function then create a php file inside app\Helpers directory and add the file path into composer.json file > files section bellow our helper files.

"autoload": {
        "files": [

corearrays.php holds all of your list options. For example active status. You call the function with a key for the key value.

function active_status($input = null) {
        $output = [
            ACTIVE_STATUS_ACTIVE => __('Active'),
            ACTIVE_STATUS_INACTIVE => __('Inactive'),

        return is_null($input) ? $output : $output[$input];

coreconstants.php holds all of your application specific constants.

helpers.php holds all of your application specific functions.

List of helper functions.

company_name(): return: company name.

company_logo(): return: company logo.

random_string(): parameters: length, characters (optional) return: string

settings(): parameters: key, fromDatabase:boolean (optional) return: value

check_language(): parameters: language return: language (if not exists return null)

set_language(): parameters: language, default language (optional) return: nothing

language(): return: list of languages.

fake_field(): parameters: field_name return: fake_field_name or plain field_name if the field is not found in fake_field lists.

base_key(): return: encrypted key

encode_decode(): parameters: string, decode:boolean (optional) return: encoded string or decoded string if decode true

validate_date(): parameters: date, separator(optional) return: boolean

has_permission(): parameters: route_name, user_id(optional), is_link(optional), is_api(optional) return: boolean

is_json(): parameters: string return: boolean

is_current_route(): parameters: route_name, active_class_name(optional), must_have_route_parameters(optional), optional_route_parameters(optional) return: active_class_name or empty string if not found.

must_have_route_parameters: the parameters that must be available to make the target html tag active. must be array or null. If data exists, parameter value must match the given condition with the given value
optional_route_parameters: the parameters that may or may not be available to make the target html tag active. must be array or null. If data exists, parameter value must match the given condition with the given value or parameter must be empty to get active status.

Array pattern of must_have_route_parameters and optional_route_parameters:
pattern 01: ['slug'=>'value', ....]
pattern 02: [['slug', '>','value'], .....]
pattern 03: [['slug', 'value'], ....]

combined or same pattern can be used. for patter 02, comparable parameters are >|>=|<|<=|=|!=
pattern 01 and 03 refers equal comarison

available_in_parameters(): parameters: route_parameter, optional_parameters(optional) return: boolean

return_get(): parameters: key, value(optional) return: ' selected' or empty string if not found.

array_to_string(): parameters: array,separator(optional), key:boolean(optional), is_seperator_at_ends:boolean(optional) return: string

valid_image(): parameters: path, image_name return: boolean

get_avatar(): parameters: avatar_name return: absolute path of the avatar

get_user_specific_notice(): parameters: user_id(optional) return: last 5 notice and unread notice count

get_nav(): parameters: place, template(optional) return: html content of the menu

get_breadcrumbs(): return: array of urls

get_system_notices(): return: list of system notices

get_available_timezones(): return: list of timezone

form_validation(): parameters: errors, field_name return: bootstrap class

get_user_roles(): return: list of user roles

get_image(): parameters: image_name return: absolute path of the image