Squashed commit of the following:

commit 7190866ccf15033f27095d635546e46dacbb755e
Author: plegall <plg@piwigo.org>
Date:   Thu Jul 12 10:52:33 2018 +0200

    Revert "Replace not maintained cssmin with fork from github https://github.com/natxet/CssMin"

    This reverts commit c8b12a2ed0.

commit 1dac11ecb6783d0d5353c3d250388f018c30fc5c
Author: plegall <plg@piwigo.org>
Date:   Thu Jul 12 10:52:24 2018 +0200

    Revert "Update Smarty to 3.1.3"

    This reverts commit db684f6151.

commit 3ac752dc93912ba5701d22dadd9bb3b81e5bb383
Merge: d1c2e71 8d58256
Author: plegall <plg@piwigo.org>
Date:   Thu Jul 12 10:50:43 2018 +0200

    Merge branch 'php72' of https://github.com/Infern1/Piwigo into Infern1-php72

commit 8d58256c45
Author: Rob Lensen <rob@bsdfreaks.nl>
Date:   Wed Mar 21 23:40:36 2018 +0100

    new feedcreator version for PHP7

commit bb0fcc3a30
Author: Rob Lensen <rob@bsdfreaks.nl>
Date:   Wed Mar 21 23:26:27 2018 +0100

    php72 fixes, replaces each() function

commit 3db22c0d33
Author: Rob Lensen <rob@bsdfreaks.nl>
Date:   Wed Mar 21 23:02:46 2018 +0100

    More fixes for PHP7.2

commit 50d8aafc77
Author: Rob Lensen <rob@bsdfreaks.nl>
Date:   Mon Mar 19 23:55:21 2018 +0100

    Some more replacements of create_function

commit 8263335c42
Author: Rob Lensen <rob@bsdfreaks.nl>
Date:   Mon Mar 19 22:54:54 2018 +0100

    Fixed indents

commit 8d58b637c6
Merge: c8b12a2 8a57d77
Author: Rob Lensen <rob@bsdfreaks.nl>
Date:   Tue Feb 27 13:51:32 2018 +0100

    Merge remote-tracking branch 'upstream/master' into php72

commit c8b12a2ed0
Author: Rob Lensen <rob@bsdfreaks.nl>
Date:   Thu Jan 18 00:32:46 2018 +0100

    Replace not maintained cssmin with fork from github https://github.com/natxet/CssMin

commit db684f6151
Author: Rob Lensen <rob@bsdfreaks.nl>
Date:   Thu Jan 18 00:23:24 2018 +0100

    Update Smarty to 3.1.3

commit 6a3f8f3e76
Author: Rob Lensen <rob@bsdfreaks.nl>
Date:   Wed Jan 17 23:40:27 2018 +0100

    Initial work to support PHP 7.2

admin/include/functions.php

@@ -675,7 +675,7 @@ SELECT id, id_uppercat, uppercats, rank, global_rank
 
   $datas = array();
 
-  $cat_map_callback = create_function('$m', 'global $cat_map; return $cat_map[$m[1]]["rank"];');
+  $cat_map_callback = function($m) use ($cat_map) {  return $cat_map[$m[1]]["rank"]; };
 
   foreach( $cat_map as $id=>$cat )
   {
@@ -1051,7 +1051,7 @@ SELECT id, uppercats, site_id
   $categories = query2array($query);
 
   // filling $cat_fulldirs
-  $cat_dirs_callback = create_function('$m', 'global $cat_dirs; return $cat_dirs[$m[1]];');
+  $cat_dirs_callback = function($m) use ($cat_dirs) { return $cat_dirs[$m[1]]; };
 
   $cat_fulldirs = array();
   foreach ($categories as $category)