vancoder

function igb_truncator( $string, $chars = 50 ) {

	$string = strip_tags( $string );

	if ( $chars < strlen( $string ) ) {
		$string = mb_substr( $string, 0, strpos( wordwrap( $string, $chars ), "\n" ) );
		$string = $string . '...';
	}

	return $string;

vancoder

function get_ordinal( $number ) {
    $suffix = array( 'th', 'st', 'nd', 'rd', 'th', 'th', 'th', 'th', 'th', 'th' );
    if ( ($number % 100) >= 11 && ($number % 100) <= 13 )
        $ordinal = $number . 'th';
    else
        $ordinal = $number . $suffix[$number % 10];
    return $ordinal;
}

vancoder

function is_ajax() {
    if ( isset( $_SERVER['HTTP_X_REQUESTED_WITH'] ) &&
            !empty( $_SERVER['HTTP_X_REQUESTED_WITH'] ) &&
            strtolower( $_SERVER['HTTP_X_REQUESTED_WITH'] ) == 'xmlhttprequest' ) {
        return true;
    }
    return false;
}