Available YayCurrency Hooks

You can add these hooks to variables in template.php to alter the data that generates the switcher.

1. Custom Variable args in template.php

add_filter('yay_currency_switcher_template_args', 'yay_currency_switcher_template_args');
function yay_currency_switcher_template_args( $args ) {
    $args['is_show_flag'] = '0'; // if you don't want to show flag in Dropdown and otherwise '1'...Default: get value in settings.
    $args['is_show_currency_name'] = '0'; // if you don't want to show Currency name in Dropdown and otherwise '1'...Default: get value in settings.
    $args['is_show_currency_code'] = '0'; // if you don't want to show Currency code in Dropdown and otherwise '1'...Default: get value in settings.
    $args['switcher_size'] = 'large'; // custom switcher size ( small | large )
    //...
    return $args;
}

1. Custom currency code in Dropdown

add_filter('yay_currency_switcher_change_currency_code', 'yay_currency_custom_currency_code_dropdown_switcher');

function yay_currency_custom_currency_code_dropdown_switcher( $currency_code ) {
    return 'EUR' === $currency_code ? 'Eu' : $currency_code;
}

1. Add custom wrapper switcher class in Dropdown

add_filter('yay_currency_switcher_class', 'yay_currency_custom_switcher_class_wrapper');

function yay_currency_custom_switcher_class_wrapper( $wrapper_class ) {
    $wrapper_class.= ' your-custom-class';
    return $wrapper_class;
}

1. Custom selected currency in Dropdown

add_filter('yay_currency_get_id_selected_currency', 'yay_currency_get_id_selected_currency');
function yay_currency_get_id_selected_currency( $currency_ID ) {
    $currency_ID = 238;
    return $currency_ID;
}

1. Added : yay_currency_custom_currency_code_by_force_country hook, allow custom currency with force payment country

add_filter( 'yay_currency_custom_currency_code_by_force_country', 'yay_currency_custom_currency_code_by_force_country', 10, 1);
function yay_currency_custom_currency_code_by_force_country( $currency_code ) {
    if( 'CAD' !== $currency_code ) {
        $currency_code = 'USD';
    }
    
    return $currency_code;
}

1. Added: filter hook hide dropdown/switcher in analytics

add_filter('yay_currency_hide_dropdown_filter_analytics', '__return_true');

1. Added: filter hook yay_currency_convert_all_orders_to_base detect convert orders

add_filter('yay_currency_convert_all_orders_to_base', 'yay_currency_convert_all_orders_to_base', 10, 1 );
function yay_currency_convert_all_orders_to_base($value) {
    return 'no';
}

1. Get cart subtotal by current currency: yay_currency_get_cart_subtotal

usage: 
use Yay_Currency\Helpers\YayCurrencyHelper;
$current_currency = YayCurrencyHelper::detect_current_currency();
$cart_subtotal = apply_filters( 'yay_currency_get_cart_subtotal', 0, $current_currency );

1. Get the shipping total by the current currency or fallback currency: yay_currency_get_shipping_total (PRO version only).

usage: 
use Yay_Currency\Helpers\YayCurrencyHelper;

//9.1. Get the shipping total by current currency
$current_currency = YayCurrencyHelper::detect_current_currency();
$cart_total = apply_filters( 'yay_currency_get_shipping_total', 0, $current_currency, false );

//9.2. Get the shipping total by fallback currency
$fallback_currency = YayCurrencyHelper::get_fallback_currency();
$cart_total = apply_filters( 'yay_currency_get_shipping_total', 0, $fallback_currency, true );

1. Get the total discount by the current currency or fallback currency: yay_currency_get_discount_total (PRO version only).

usage: 
use Yay_Currency\Helpers\YayCurrencyHelper;

//10.1. Get the total discount by current currency
$current_currency = YayCurrencyHelper::detect_current_currency();
$cart_total = apply_filters( 'yay_currency_get_discount_total', 0, $current_currency, false );

//10.2. Get the total discount by fallback currency
$fallback_currency = YayCurrencyHelper::get_fallback_currency();
$cart_total = apply_filters( 'yay_currency_get_discount_total', 0, $fallback_currency, true );

1. Get the total tax by the current currency: yay_currency_get_total_tax (PRO version only).

usage: 
use Yay_Currency\Helpers\YayCurrencyHelper;
$current_currency = YayCurrencyHelper::detect_current_currency();
$cart_total = apply_filters( 'yay_currency_get_total_tax', 0, $current_currency );

1. Get the total fee by current currency: yay_currency_get_fee_total (PRO version only).

usage: 
use Yay_Currency\Helpers\YayCurrencyHelper;
$current_currency = YayCurrencyHelper::detect_current_currency();
$cart_total = apply_filters( 'yay_currency_get_fee_total', 0, $current_currency );

1. Get the cart total by the current currency or fallback currency: yay_currency_get_cart_total (PRO version only).

usage: 
use Yay_Currency\Helpers\YayCurrencyHelper;

//13.1. Get the cart total by by current currency
$current_currency = YayCurrencyHelper::detect_current_currency();
$cart_total = apply_filters( 'yay_currency_get_cart_total', 0, $current_currency, false );

//13.2. Get the cart total by by fallback currency
$fallback_currency = YayCurrencyHelper::get_fallback_currency();
$cart_total = apply_filters( 'yay_currency_get_cart_total', 0, $fallback_currency, true );

1. Get the exchange rate for the current currency: yay_currency_rate

usage: 
$rate_fee = apply_filters('yay_currency_rate',1);

1. Customize the current currency based on your conditions: yay_currency_apply_currency

usage: 
use Yay_Currency\Helpers\YayCurrencyHelper;

// 15.1 When a user is logged in, they are forced to use a custom currency; when the user is not logged in, the current currency is used.
add_filter('yay_currency_apply_currency', 'custom_yay_currency_apply_currency', 10, 1 );
function custom_yay_currency_apply_currency( $current_currency ) {
    if ( !is_user_logged_in() ) {
        return $current_currency;
    }
    $custom_currency_code = 'EUR';
    $custom_current_currency     = YayCurrencyHelper::get_currency_by_currency_code( $custom_currency_code );
    return $custom_current_currency ? $custom_current_currency : $current_currency;
}

// 15.2 Custom current currency with Multiple Language plugins
usage: 
use Yay_Currency\Helpers\YayCurrencyHelper;

// 15.2.1 Polylang and TranslatePress:
add_action( 'yay_currency_apply_currency', 'yay_currency_custom_current_currency' );
function yay_currency_custom_current_currency( $current_currency ) {
    $currency_code = $current_currency['currency'];
    $current_lang = get_locale(); // get current language
    switch ($current_lang) {
        case 'en_US':
            $currency_code = 'USD';
            break;
        case 'en_GB':
            $currency_code = 'GBP';
            break;
        case 'it_IT':
            $currency_code = 'EUR';
            break;
        default:
            break;
    }
    $custom_current_currency = YayCurrencyHelper::get_currency_by_currency_code( $currency_code );
    return $custom_current_currency ? $custom_current_currency : $current_currency;
}

// 15.2.2 GTranslate
add_action( 'yay_currency_apply_currency', 'yay_currency_custom_current_currency' );
function yay_currency_custom_current_currency( $current_currency ) {
    $currency_code = $current_currency['currency'];
    $current_lang = isset($_SERVER['HTTP_X_GT_LANG']) ? $_SERVER['HTTP_X_GT_LANG'] : ''; // get current language
    switch ($current_lang) {
        case 'en_US':
            $currency_code = 'USD';
            break;
        case 'en_GB':
            $currency_code = 'GBP';
            break;
        case 'it_IT':
            $currency_code = 'EUR';
            break;
        default:
            break;
    }

    $custom_current_currency = YayCurrencyHelper::get_currency_by_currency_code( $currency_code );
    return $custom_current_currency ? $custom_current_currency : $current_currency;
}

// 15.2.3 qTranslate X integration
add_action( 'yay_currency_apply_currency', 'yay_currency_custom_current_currency' );
function yay_currency_custom_current_currency( $current_currency ) {
    $currency_code = $current_currency['currency'];
    if ( function_exists('qtranxf_getLanguage') ) {
        $current_lang = qtranxf_getLanguage(); // get current language
        switch ($current_lang) {
            case 'en_US':
                $currency_code = 'USD';
                break;
            case 'en_GB':
                $currency_code = 'GBP';
                break;
            case 'it_IT':
                $currency_code = 'EUR';
                break;
            default:
                break;
        }
    }
    
    $custom_current_currency = YayCurrencyHelper::get_currency_by_currency_code( $currency_code );
    return $custom_current_currency ? $custom_current_currency : $apply_currency;
}

//NOTE: WPML and Polylang (or other multiple languages plugins) function similarly to the above...

1. Customize the currency code: yay_currency_woocommerce_currency

usage: 

add_filter( 'yay_currency_woocommerce_currency', array( $this, 'custom_currency_code' ), 10, 2 );
function custom_currency_code( $currency_code, $is_dis_checkout_diff_currency ) {
    //... Your condition here .../
    return $currency_code;
}

1. Customize the currency symbol: yay_currency_woocommerce_currency_symbol

usage: 

add_filter( 'yay_currency_woocommerce_currency_symbol', array( $this, 'custom_currency_symbol' ), 10, 2 );
function custom_currency_symbol( $currency_symbol, $currency, $current_currency ) {
    //... Your condition here .../
    return $currency_symbol;
}

1. Customize the price format: yay_currency_custom_price_format

usage: 

add_filter( 'yay_currency_custom_price_format', array( $this, 'custom_price_format' ), 10, 2 );
function custom_price_format( $format, $apply_currency ) {
    //... Your condition here .../
    return $format;
}

1. Customize product prices based on the current currency: yay_currency_get_price_by_currency

usage: 

add_filter( 'yay_currency_get_price_by_currency', array( $this, 'custom_price_by_currency' ), 10, 3 );
public function custom_price_by_currency( $current_price, $product, $current_currency ) {
    //... Your condition here .../
    return $current_price;
}