<?php

function getwords( $string ) {
	if( strpos($string,"xn--") !== false ) {
		return false;
	}
	$string = trim( str_replace( '-', '', $string ) );
	$pspell = pspell_new( 'en' );
	$check = array();
	$words = array();
	for( $j = 0; $j < ( strlen( $string ) - 5 ); $j++ ) {
		for( $i = 4; $i < strlen( $string ); $i++ ) {
			if( pspell_check( $pspell, substr( $string, $j, $i ) ) ) {
				$check[$j]++;
				$words[] = substr( $string, $j, $i );
			}
		}
	}
	$words = array_unique( $words );
	if( count( $check ) > 0 ) {
		return $words;
	}
	return false;
}

print_r( getwords( '00-sunglasses.com' ) );
?>