<?php

$testes = ['255.255.255.255', '0.0.0.0', '255.0.255.0', '0.255.0.255', '0.255.255.0', '128.0.0.0', '0.255.128.0'];

foreach($testes as $teste){
	echo 'Testando: ' . $teste;
	echo "\n";
	echo 'Resultado: ' . sprintf('%032b', ip2long($teste));
	echo "\n";
	echo "\n";
}