Arabic-Indic Numerals for Arabic Wordpress

This plugin simply replaces Arabic numerals (a.k.a. Hindu-Arabic numerals or Indo-Arabic numerals) with Eastern Arabic numerals (a.k.a. Arabic–Indic numerals or Arabic Eastern numerals) in the date of posts or comments on WordPress. This is useful on sites using the Arabic version of WordPress, which translates month names but leaves the numbers unchanged.

For more details, please see the plugin page on Wordpress.org. If you would like to contribute any ideas or improvements, please feel free to fork the plugin on Github.

// If this file is called directly, abort.
if ( !defined( 'WPINC' ) ) {
	die;
}

/**
 * Replaces English numbers with Arabic numbers in given string.
 *
 * @since 0.15
 *
 * @param string	$string A string containing English numbers
 * @return string	A string containing Arabic numbers
 */
function convert_numbers_to_arabic( $string ) {
	$arabic_numbers = array('۰', '۱', '۲', '۳', '٤', '۵', '٦', '۷', '۸', '۹', '.');
	$english_numbers = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '.');
	return str_replace($english_numbers, $arabic_numbers, $string);
}

/**
 * If the blog language is Arabic, hook into date and time functions
 * and convert the numbers to Arabic.
 *
 * @since 0.15
 *
 * @param string	$the_date the date as returned by get_the_time or get_the_date
 * @return string	The date with Arabic numbers
 */
function make_arabic_date( $the_date, $force=null ) {
	if ( get_bloginfo( 'language' ) == 'ar' || $force ) {
		$the_date = convert_numbers_to_arabic( $the_date );
	}
	return $the_date;
}
add_filter( 'get_the_time', 'make_arabic_date' );
add_filter( 'get_the_date', 'make_arabic_date' );

/**
 * Shortcode for inserting a the Arabic date of the current post.
 * [arabic_date]
 *
 * @since 1.0.0
 *
 * @param array $atts Shortcode attributes
 * @return string The post date in Arabic
 */
function jlv_arabic_date_shortcode( $atts ) {
	$the_date = get_the_date();
	return make_arabic_date( $the_date, true );
}
add_shortcode( 'arabic_date', 'jlv_arabic_date_shortcode' );

/**
 * Load plugin textdomain.
 *
 * @since 1.0.0
 */
function jlv_arabic_indic_numerals_load_textdomain() {
  load_plugin_textdomain( 'arabic-indic-numerals-for-arabic-wp', false, basename( dirname( __FILE__ ) ) . '/languages' );
}

add_action( 'init', 'jlv_arabic_indic_numerals_load_textdomain' );
?>

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This was originally based upon the answer to a question on Stack Overflow.