Помогите создать массив!

Как создать массив для скрипта:

<?php
$file = fopen('172.17.1.11.cfg', 'r');
$text = fread($file, filesize('172.17.1.11.cfg'));
fclose($file);
$file = fopen('172.17.1.11.cfg_', 'w');
$text = str_replace('blackhole', 'shutdown', $text);
$text = str_replace('anti-arpscan recovery time 1800', 'anti-arpscan recovery time 3600', $text);
$text = str_replace('loopback-detection control-recovery timeout 1800', 'loopback-detection control-recovery timeout 3600', $text);
$text = str_replace('ip dhcp snooping action shutdown recovery 900', 'ip dhcp snooping action shutdown recovery 3600', $text);
$text = str_replace('ip dhcp snooping action shutdown recovery 1800', 'ip dhcp snooping action shutdown recovery 3600', $text);
fwrite($file, $text);
fclose($file);
?>

Вот сделал наброски но скрипт правильно не работает!

<?php

$mass_ip = array ('172.17.0.4.cfg', '172.17.0.5.cfg', '172.17.0.6.cfg');

foreach($mass_ip as $value) {
$file = fopen('$value', 'r');
$text = fread($file, filesize('$value'));
fclose($file);
$file = fopen('$value_', 'w');
$text = str_replace('blackhole', 'shutdown', $text);
$text = str_replace('anti-arpscan recovery time 1800', 'anti-arpscan recovery time 3600', $text);
$text = str_replace('loopback-detection control-recovery timeout 1800', 'loopback-detection control-recovery timeout 3600', $text);
$text = str_replace('ip dhcp snooping action shutdown recovery 900', 'ip dhcp snooping action shutdown recovery 3600', $text);
$text = str_replace('ip dhcp snooping action shutdown recovery 1800', 'ip dhcp snooping action shutdown recovery 3600', $text);
fwrite($file, $text);
fclose($file);
print_r ($mass_ip);

}

?>

Подскажите что не так!