Function and usage of is_rtl() in wordpress


Answers ( 1 )


    The is_rtl() function in WordPress is a simple yet useful tool, especially in themes and plugins, to determine the text direction of the current language setting of the website. Here's a detailed explanation and sample usage:

    Function Signature:

    is_rtl(): bool

    Function Description:

    • Purpose: The is_rtl() function checks if the current language set in the WordPress installation is a Right-To-Left (RTL) language. It's a crucial function for ensuring proper display and functionality of themes and plugins in RTL languages like Arabic, Hebrew, Urdu, etc.
    • How It Works: This function inspects the current locale setting of WordPress and determines if the text direction for that locale is RTL.
    • Use in Themes/Plugins: It's commonly used in theme or plugin development to add conditional styling or behavior depending on whether the text direction is RTL or Left-To-Right (LTR).


    • Type: bool
    • Value: Returns true if the current locale is an RTL language, otherwise returns false.

    Sample Usage:

    Example 1: Applying Conditional CSS Classes

    if ( is_rtl() ) {
        echo 'class="rtl"';
    } else {
        echo 'class="ltr"';

    In this example, the function is used to apply different CSS classes based on the text direction. This is useful for styling elements differently in RTL and LTR languages.

    Example 2: Enqueueing RTL Stylesheets

    function theme_enqueue_styles() {
        if ( is_rtl() ) {
            wp_enqueue_style( 'theme-rtl-styles', get_template_directory_uri() . '/rtl.css' );
        } else {
            wp_enqueue_style( 'theme-ltr-styles', get_template_directory_uri() . '/style.css' );
    add_action( 'wp_enqueue_scripts', 'theme_enqueue_styles' );

    In this scenario, the is_rtl() function is used to load different stylesheets depending on whether the site is in an RTL language. This allows for distinct styling adjustments for RTL layouts.

    Example 3: Conditional HTML Markup

    if ( is_rtl() ) {
        // RTL-specific HTML markup or structure
    } else {
        // Default LTR-specific HTML markup or structure

    This example shows how you might use is_rtl() to alter the HTML structure or content based on the text direction, providing a better user experience for RTL languages.

    Additional Information:

    • Found in: wp-includes/l10n.php
    • For more details and examples, WordPress recommends checking out the Conditional Tags article in the Theme Developer Handbook, which provides further insights into similar functions and their applications in theme development.

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