diff --git a/interface/web/sites/database_quota_stats.php b/interface/web/sites/database_quota_stats.php
index faf362190f8f3d1169989966eae04518aad97f24..5e95fdcaf8cfbeec4e667d995f969e2ebb2be02a 100644
--- a/interface/web/sites/database_quota_stats.php
+++ b/interface/web/sites/database_quota_stats.php
@@ -57,7 +57,9 @@ class list_action extends listform_actions {
 		if(!empty($monitor_data[$rec['server_id'].'.'.$database_name])){
 			$rec['database'] = $monitor_data[$rec['server_id'].'.'.$database_name]['database_name'];
 			$rec['client'] = $monitor_data[$rec['server_id'].'.'.$database_name]['client'];
-			$rec['server_name'] = $app->db->queryOneRecord("SELECT server_name FROM server WHERE server_id = ?", $rec['server_id'])['server_name'];
+			$tmp = $app->db->queryOneRecord("SELECT server_name FROM server WHERE server_id = ?", $rec['server_id']);
+			$rec['server_name'] = $tmp['server_name'];
+			unset($tmp);
 			$rec['used'] = $monitor_data[$rec['server_id'].'.'.$database_name]['used'];
 			$rec['quota'] = $monitor_data[$rec['server_id'].'.'.$database_name]['quota'];
 
diff --git a/server/plugins-available/apache2_plugin.inc.php b/server/plugins-available/apache2_plugin.inc.php
index 8c1da7881412de7fd1c422ea37d51dc81ba75684..4f6d2f0c7f259869895cc63f3e28d09464eeb2da 100644
--- a/server/plugins-available/apache2_plugin.inc.php
+++ b/server/plugins-available/apache2_plugin.inc.php
@@ -882,9 +882,9 @@ class apache2_plugin {
 			}
             
           // get the primitive folder for document_root and the filesystem, will need it later.
-          $df_output=exec("df -T $document_root|awk 'END{print \$2,\$NF}'");
-          $file_system = explode(" ", $df_output)[0];
-          $primitive_root = explode(" ", $df_output)[1];
+          $df_output=explode(" ", exec("df -T $document_root|awk 'END{print \$2,\$NF}'"));
+          $file_system = $df_output[0];
+          $primitive_root = $df_output[1];
 
 		  if ( in_array($file_system , array('ext2','ext3','ext4'), true) ) {
             exec('setquota -u '. $username . ' ' . $blocks_soft . ' ' . $blocks_hard . ' 0 0 -a &> /dev/null');
diff --git a/server/plugins-available/cron_plugin.inc.php b/server/plugins-available/cron_plugin.inc.php
index fe3ddfb0b9527bed0f175e22d0e7b9d7e917e8c6..b54e9711be5667bcf4efe975c9dcb708373a4b1b 100644
--- a/server/plugins-available/cron_plugin.inc.php
+++ b/server/plugins-available/cron_plugin.inc.php
@@ -136,9 +136,9 @@ class cron_plugin {
             }
 
             // get the primitive folder for document_root and the filesystem, will need it later.
-            $df_output=exec("df -T $document_root|awk 'END{print \$2,\$NF}'");
-            $file_system = explode(" ", $df_output)[0];
-            $primitive_root = explode(" ", $df_output)[1];
+            $df_output=explode(" ", exec("df -T $document_root|awk 'END{print \$2,\$NF}'"));
+            $file_system = $df_output[0];
+            $primitive_root = $df_output[1];
 
             if ( in_array($file_system , array('ext2','ext3','ext4'),true) ) {
               exec('setquota -u '. $username . ' ' . $blocks_soft . ' ' . $blocks_hard . ' 0 0 -a &> /dev/null');
diff --git a/server/plugins-available/mail_plugin.inc.php b/server/plugins-available/mail_plugin.inc.php
index 8696205a00c64bfd91224434ef56c14d221590be..8275696620fbe1612aa78c816f9a9deaf1f11c7d 100644
--- a/server/plugins-available/mail_plugin.inc.php
+++ b/server/plugins-available/mail_plugin.inc.php
@@ -206,7 +206,9 @@ class mail_plugin {
 		}
 
 		//* Send the welcome email message
-		$domain = explode('@', $data["new"]["email"])[1];
+		$tmp = explode('@', $data["new"]["email"]);
+		$domain = $tmp[1];
+		unset($tmp);
 		$html = false;
 		if(file_exists($conf['rootpath'].'/conf-custom/mail/welcome_email_'.$domain.'.html')) {
 			$lines = file($conf['rootpath'].'/conf-custom/mail/welcome_email_'.$domain.'.html');
@@ -466,7 +468,9 @@ class mail_plugin {
 			if( $server_config['backup_dir_is_mount'] == 'y' && !$app->system->mount_backup_dir($backup_dir) ) $mount_backup = false;
 			if($mount_backup){
 				$sql = "SELECT * FROM mail_domain WHERE domain = ?";
-				$domain_rec = $app->db->queryOneRecord($sql, explode("@",$data['old']['email'])[1]);
+				$tmp = explode("@",$data['old']['email']);
+				$domain_rec = $app->db->queryOneRecord($sql,$tmp[1]);
+				unset($tmp);
 				if (is_array($domain_rec)) {
 					$mail_backup_dir = $backup_dir.'/mail'.$domain_rec['domain_id'];
 					$mail_backup_files = 'mail'.$data['old']['mailuser_id'];
diff --git a/server/plugins-available/nginx_plugin.inc.php b/server/plugins-available/nginx_plugin.inc.php
index 9393a9b66b4b795688a605e73461ac3b5f4f58e5..ff9af43db2c0adb08969cfa95cd47be820304ec4 100644
--- a/server/plugins-available/nginx_plugin.inc.php
+++ b/server/plugins-available/nginx_plugin.inc.php
@@ -741,9 +741,9 @@ class nginx_plugin {
 			}
             
           // get the primitive folder for document_root and the filesystem, will need it later.
-          $df_output=exec("df -T $document_root|awk 'END{print \$2,\$NF}'");
-          $file_system = explode(" ", $df_output)[0];
-          $primitive_root = explode(" ", $df_output)[1];
+          $df_output=explode(" ", exec("df -T $document_root|awk 'END{print \$2,\$NF}'"));
+          $file_system = $df_output[0];
+          $primitive_root = $df_output[1];
 
           if ( in_array($file_system , array('ext2','ext3','ext4'), true) ) {
             exec('setquota -u '. $username . ' ' . $blocks_soft . ' ' . $blocks_hard . ' 0 0 -a &> /dev/null');