drop use of the deprecated PHP imap extension (php-imap) - see #472 and #812

INSTALL.TXT

@@ -174,12 +174,6 @@ And if the webserver (PHP) needs to make network connections out to a database s
     semanage boolean -m --on httpd_can_network_connect_db
 ````
 
-If additionally, needing the webserver (PHP) to talk to an imap server, then you'll probably also need:
-
-```bash
-    semanage boolean -m --on httpd_can_network_connect
-````
-
 
 5. Check settings, and create Admin user
 ----------------------------------------

debian/control

@@ -11,7 +11,7 @@ Homepage: http://postfixadmin.sourceforge.net
 
 Package: postfixadmin
 Architecture: all
-Depends: debconf (>= 0.5), dbconfig-common, wwwconfig-common, apache2 | lighttpd | httpd, libapache2-mod-php | php-cgi | php-fpm | php, php-imap, php-mysql | php-mysqlnd | php-pgsql | php-sqlite3, php-mbstring, default-mysql-client | postgresql-client | mariadb-client, ${misc:Depends}
+Depends: debconf (>= 0.5), dbconfig-common, wwwconfig-common, apache2 | lighttpd | httpd, libapache2-mod-php | php-cgi | php-fpm | php, php-mysql | php-mysqlnd | php-pgsql | php-sqlite3, php-mbstring, default-mysql-client | postgresql-client | mariadb-client, ${misc:Depends}
 Recommends: postfix-mysql | postfix-pgsql, virtual-mysql-server | postgresql | sqlite3 (>= 3.12.0) | mariadb-server, zendframework, dovecot-core | courier-authlib-mysql | courier-authlib-postgresql, php-cli
 Description: Virtual mail hosting interface for Postfix
  Postfixadmin is a web interface to manage virtual users and domains

model/MailboxHandler.php

@@ -749,76 +749,17 @@ class MailboxHandler extends PFAHandler
      */
     protected function create_mailbox_subfolders()
     {
+        // no longer implemented; code relied on deprecated PHP imap extension.
+
         $create_mailbox_subdirs = Config::read('create_mailbox_subdirs');
         if (empty($create_mailbox_subdirs)) {
             return true;
         }
 
-        if (!function_exists('imap_open')) {
+        // see https://github.com/postfixadmin/postfixadmin/issues/472
-            trigger_error('imap_open function not present; cannot create_mailbox_subdirs');
+        // see https://github.com/postfixadmin/postfixadmin/issues/812 etc
-            return false;
+        error_log(__FILE__ . ' WARNING : PostfixAdmin no longer supports the imap folder population via config parameters: create_mailbox_subdirs, create_mailbox_subdirs_host, create_mailbox_subdirs_hostport and create_mailbox_subdirs_hostoptions ');
-        }
 
-        if (!is_array($create_mailbox_subdirs)) {
-            trigger_error('create_mailbox_subdirs must be an array', E_USER_ERROR);
-            return false;
-        }
-
-        $s_host = Config::read_string('create_mailbox_subdirs_host');
-        if (empty($s_host)) {
-            trigger_error('An IMAP/POP server host ($CONF["create_mailbox_subdirs_host"]) must be configured, if sub-folders are to be created', E_USER_ERROR);
-            return false;
-        }
-
-        $s_options='';
-
-        $create_mailbox_subdirs_hostoptions = Config::read('create_mailbox_subdirs_hostoptions');
-        if (!empty($create_mailbox_subdirs_hostoptions)) {
-            if (!is_array($create_mailbox_subdirs_hostoptions)) {
-                trigger_error('The $CONF["create_mailbox_subdirs_hostoptions"] parameter must be an array', E_USER_ERROR);
-                return false;
-            }
-            foreach ($create_mailbox_subdirs_hostoptions as $o) {
-                $s_options.='/'.$o;
-            }
-        }
-
-        $s_port='';
-        if (Config::has('create_mailbox_subdirs_hostport')) {
-            $create_mailbox_subdirs_hostport = Config::read('create_mailbox_subdirs_hostport');
-            if (!empty($create_mailbox_subdirs_hostport)) {
-                $s_port = $create_mailbox_subdirs_hostport;
-                if (intval($s_port)!=$s_port) {
-                    trigger_error('The $CONF["create_mailbox_subdirs_hostport"] parameter must be an integer', E_USER_ERROR);
-                    return false;
-                }
-                $s_port=':'.$s_port;
-            }
-        }
-
-        $s='{'.$s_host.$s_port.$s_options.'}';
-
-        sleep(1); # give the mail triggering the mailbox creation a chance to do its job
-
-        $i=@imap_open($s, $this->id, $this->values['password']);
-        if (false==$i) {
-            error_log('Could not log into IMAP/POP server: ' . $this->id . ': ' . imap_last_error());
-            return false;
-        }
-
-        $s_prefix = Config::read_string('create_mailbox_subdirs_prefix');
-        foreach ($create_mailbox_subdirs as $f) {
-            $f='{'.$s_host.'}'.$s_prefix.$f;
-            $res=imap_createmailbox($i, $f);
-            if (!$res) {
-                error_log('Could not create IMAP folder $f: ' . $this->id . ': ' . imap_last_error());
-                @imap_close($i);
-                return false;
-            }
-            @imap_subscribe($i, $f);
-        }
-
-        @imap_close($i);
         return true;
     }
 

public/setup.php

@@ -573,7 +573,6 @@ function do_software_environment_check()
     $f_session_start = function_exists("session_start");
     $f_preg_match = function_exists("preg_match");
     $f_mb_encode_mimeheader = function_exists("mb_encode_mimeheader");
-    $f_imap_open = function_exists("imap_open");
 
     $file_local_config = realpath(__DIR__ . "/../config.local.php");
 
@@ -727,13 +726,5 @@ function do_software_environment_check()
     }
 
 
-    // Imap functions
-    if ($f_imap_open) {
-        $info[] = "Optional - PHP IMAP functions - OK";
-    } else {
-        $warn[] = "Warning: Optional dependency - PHP 'imap' extension missing. Without this you may not be able to automate creation of sub-folders for new mailboxes";
-    }
-
-
     return ['error' => $error, 'warn' => $warn, 'info' => $info];
 }