apache - php variable $page not passed correctly into the URL -

i'm trying install review&approval server kollaborate, it's zip package containing js/php files needs deployed in document root, , navigate http://server-ip/install/index.php

but navigating next page result in literally passing $page variable url instead of 1.php -> 2.php , on.. this: http//server-ip/install/index.php?page=<?=($page+1) resulting in 'page not found!' pagecounter on webpage not displaying correctly looks variable $page index.php not passed browser correctly real value. suexec disabled fast-cgi wrapper, , there re-writing rules in .htaccess

rewriteengine on # not directory rewritecond %{request_filename} !-d # existing php file rewritecond %{request_filename}\.php -f # rewrite index index.php rewriterule ^(.*)$ $1.php 

a short snippet navigation function done javascript: since piece of software can purchased , don't need editing customers show how construct it. kollaborate support not me further other saying wrong in installation.

<?php $page_count = 15; $page = 1; if (isset($_get['page'])) $page = $_get['page'];  if (!file_exists("pages/$page.php")) {     echo '<h1>error: page not found!</h1>     <a href="index.php?page='.($page+1).'"><button>next page</button</a>';     exit; } 

and navigation step bit further in index.php

<script> function nextpage() { if (typeof endpage == 'function') {     var err = endpage();             if (err && err.length > 0) {         $('#error').html(err);         $('#error').show();         return;     } }  $('#error').hide();     window.location.href = "index.php?page=<?=($page+1)?>"; } </script> 

this kollaborate server requires sort of lampp stack on ubuntu, i'm using centos , installed separate required packages php/mysql/nodejs/

the configuration of server goes in 15 steps each step defined in separate php files(1.php thru 15.php) residing in pages folder within install folder.

i had working once centos year ago, can't figure out for... malformed config issue in httpd or php? or nodejs perhaps? installed on centos 6.7 latest of , based on httpd , php 5.5.3(tried nginx before yields in same disappointing result)

from first glance short tags might not turned on in php config. using short tags <? instead of long tags <?php requires short_open_tag php ini directive set. if create php script in application , have run phpinfo(); there should line tells if short tags off or on. search 'short_open_tag'.

you try switching long tag syntax in index.php, instead of

window.location.href = "index.php?page=<?=($page+1)?>"; 

the line be

window.location.href = "index.php?page=<?php echo ($page+1);?>";