diff --git a/app/code/Scenario.php b/app/code/Scenario.php
index cb412df..b6095a4 100644
--- a/app/code/Scenario.php
+++ b/app/code/Scenario.php
@@ -54,7 +54,7 @@ class Scenario
         if ($this->backup->isValid()) {
             $this->transport->send();
         } else {
-            throw new \Exception("Backup configuration is invalid.");
+            throw new \Exception('Backup configuration is invalid.');
         }
     }
 
@@ -75,7 +75,7 @@ class Scenario
         // check the given scenario
         if (is_readable($scenario)) {
             $scenario = json_decode(file_get_contents($scenario), true);
-            if (!is_null($scenario) && static::isValid($scenario)) {
+            if ($scenario !== null && static::isValid($scenario)) {
                 try {
                     $scenario = new self($scenario);
                     $scenario->send();
@@ -99,9 +99,8 @@ class Scenario
     public static function isValid(array $scenario)
     {
         return
-            isset($scenario['backup']) &&
+            isset($scenario['backup'], $scenario['transport']) &&
             count($scenario['backup']) === 1 &&
-            isset($scenario['transport']) &&
             count($scenario['transport']) === 1;
     }
 }
diff --git a/app/code/Transport/Dropbox.php b/app/code/Transport/Dropbox.php
index 972114c..05ed9e5 100644
--- a/app/code/Transport/Dropbox.php
+++ b/app/code/Transport/Dropbox.php
@@ -30,21 +30,25 @@ class Dropbox extends TransportAbstract
     public function send()
     {
         $sent = true;
-        $files = $this->backup->getFilesTobackup();
+        $files = $this->backup->getFilesToBackup();
         foreach ($files as $file => $name) {
-            $file = fopen($file, 'r');
+            $file = fopen($file, 'rb');
             $upload = $this->dropbox->uploadFile($this->folder.'/'.$name, \Dropbox\WriteMode::force(), $file);
             if (!$upload) {
                 $sent = false;
                 echo 'DROPBOX upload manqu�e de '.$file.' vers '.$this->folder.$name;
             }
         }
-        $streams = $this->backup->getStreamsTobackup();
+        $streams = $this->backup->getStreamsToBackup();
         foreach ($streams as $stream => $name) {
-            $upload = $this->dropbox->uploadFileFromString($this->folder.'/'.$name, \Dropbox\WriteMode::force(), $stream);
+            $upload = $this->dropbox->uploadFileFromString(
+                $this->folder . '/' . $name,
+                \Dropbox\WriteMode::force(),
+                $stream
+            );
             if (!$upload) {
                 $sent = false;
-                echo 'DROPBOX upload manqu�e de '.$file.' vers '.$this->folder.$name;
+                echo 'DROPBOX upload manquée de ' . $file . ' vers '.$this->folder.$name;
             }
         }
         return $sent;
diff --git a/app/code/Transport/Email.php b/app/code/Transport/Email.php
index 4544c83..f28f8e5 100644
--- a/app/code/Transport/Email.php
+++ b/app/code/Transport/Email.php
@@ -132,16 +132,19 @@ class Email extends TransportAbstract
             $type = (string) finfo_file($finfo, $file);
             finfo_close($finfo);
             return $type;
-        } else if (function_exists('mime_content_type')) {
-            return mime_content_type($file);
-        } else {
-            $ext = strtolower(array_pop(explode('.', $file)));
-            if (array_key_exists($ext, self::$mimeTypes)) {
-                return self::$mimeTypes[$ext];
-            } else {
-                return 'application/octet-stream';
-            }
         }
+
+        if (function_exists('mime_content_type')) {
+            return mime_content_type($file);
+        }
+
+        $file_info = explode('.', $file);
+        $ext = strtolower(array_pop($file_info));
+        if (array_key_exists($ext, self::$mimeTypes)) {
+            return self::$mimeTypes[$ext];
+        }
+
+        return 'application/octet-stream';
     }
 
     /**
@@ -150,8 +153,8 @@ class Email extends TransportAbstract
     public function __construct(BackupAbstract $backup, array $config)
     {
         parent::__construct($backup, $config);
-        $this->setFiles($this->backup->getFilesTobackup());
-        $this->setStreams($this->backup->getStreamsTobackup());
+        $this->setFiles($this->backup->getFilesToBackup());
+        $this->setStreams($this->backup->getStreamsToBackup());
         $this->email_to = $this->config['to'];
         $this->email_from = $this->config['from'];
         $this->encoding = $this->config['encoding'];
@@ -200,8 +203,8 @@ class Email extends TransportAbstract
     
         // Checking files are selected
         $zip = new \ZipArchive(); // Load zip library
-        $zip_name = time().".zip"; // Zip name
-        if ($zip->open(TEMP_DIR.$zip_name, \ZIPARCHIVE::CREATE)==true) {
+        $zip_name = time(). '.zip'; // Zip name
+        if ($zip->open(TEMP_DIR.$zip_name, \ZIPARCHIVE::CREATE)===true) {
             if (!empty($this->files)) {
                 foreach ($this->files as $file => $name) {
                     $zip->addFile($file, $name); // Adding files into zip
@@ -214,9 +217,9 @@ class Email extends TransportAbstract
         
         $this->files = array(TEMP_DIR.$zip_name=>$zip_name);
 
-        $random_hash = md5(date('r', time()));
-        $headers = "From: " . $this->email_from . "\r\nReply-To: " . $this->email_from;
-        $headers .= "\r\nMIME-Version: 1.0\r\nContent-Type: multipart/mixed; boundary=\"" . $random_hash . "\"";
+        $random_hash = md5(date('r'));
+        $headers = 'From: ' . $this->email_from . "\r\nReply-To: " . $this->email_from;
+        $headers .= "\r\nMIME-Version: 1.0\r\nContent-Type: multipart/mixed; boundary=\"" . $random_hash . '"';
         $output = "
 
 --$random_hash
@@ -229,26 +232,26 @@ Content-Transfer-Encoding: 8bit
             foreach ($this->files as $file => $name) {
                 $output .= "
 --$random_hash
-Content-Type: " . self::getMimeType($file) . "; name=" . $name . "
+Content-Type: " . self::getMimeType($file) . '; name=' . $name . '
 Content-Transfer-Encoding: base64
-Content-Disposition: attachment; filename=" . $name . "
+Content-Disposition: attachment; filename=' . $name . '
  
-" . chunk_split(base64_encode(file_get_contents($file)));
+' . chunk_split(base64_encode(file_get_contents($file)));
             }
         }
         
         if (!empty($this->streams)) {
             foreach ($this->streams as $name => $stream) {
-                if (count(explode('.', $name))<2) {
+                if (substr_count($name, '.') + 1 <2) {
                     $name = 'backup'.$name.'.txt';
                 }
                 $output .= "
 --$random_hash
-Content-Type: text/plain; name=" . $name . "
+Content-Type: text/plain; name=" . $name . '
 Content-Transfer-Encoding: base64
-Content-Disposition: attachment; filename=" . $name . "
+Content-Disposition: attachment; filename=' . $name . '
  
-" . chunk_split(base64_encode($stream));
+' . chunk_split(base64_encode($stream));
             }
         }
         $output.="--$random_hash--";
diff --git a/app/code/Transport/FTP.php b/app/code/Transport/FTP.php
index d8eb7f1..d1b247a 100644
--- a/app/code/Transport/FTP.php
+++ b/app/code/Transport/FTP.php
@@ -25,7 +25,7 @@ class Ftp extends TransportAbstract
         }
 
         $this->connection = ftp_connect($this->host);
-        if ($this->connection == false) {
+        if ($this->connection === false) {
             throw new \Exception(sprintf('I can\'t connect to the FTP %s', $this->host));
         }
 
@@ -35,8 +35,8 @@ class Ftp extends TransportAbstract
             throw new \Exception($msg);
         }
 
-        $this->setFiles($this->backup->getFilesTobackup());
-        $this->setStreams($this->backup->getStreamsTobackup());
+        $this->setFiles($this->backup->getFilesToBackup());
+        $this->setStreams($this->backup->getStreamsToBackup());
     }
 
     private function setFiles($files = array())
@@ -57,6 +57,7 @@ class Ftp extends TransportAbstract
 
     /**
      * @return bool
+     * @throws \Exception
      */
     public function send()
     {
@@ -74,7 +75,7 @@ class Ftp extends TransportAbstract
 
         if (!empty($this->streams)) {
             foreach ($this->streams as $name => $stream) {
-                if (count(explode('.', $name)) < 2) {
+                if (substr_count($name, '.') + 1 < 2) {
                     $name = 'backup' . $name . '.txt';
                 }
                 file_put_contents($name, $stream);
diff --git a/app/code/Transport/Folder.php b/app/code/Transport/Folder.php
index ed28467..55b0f5b 100644
--- a/app/code/Transport/Folder.php
+++ b/app/code/Transport/Folder.php
@@ -29,13 +29,13 @@ class Folder extends TransportAbstract
     */
     public function send()
     {
-        foreach ($this->backup->getFilesTobackup() as $file => $name) {
+        foreach ($this->backup->getFilesToBackup() as $file => $name) {
             if (copy($file, $this->folder . $name) === false) {
                 throw new \Exception(sprintf('Copy of %s in %s failed', $name, $this->folder));
             };
         }
-        foreach ($this->backup->getStreamsTobackup() as $name => $file) {
-            if (count(explode('.', $name)) < 2) {
+        foreach ($this->backup->getStreamsToBackup() as $name => $file) {
+            if (substr_count($name, '.') + 1 < 2) {
                 $name = 'backup' . $name . '.txt';
             }
             if (file_put_contents($this->folder . $name, $file) === false) {
diff --git a/app/code/Transport/SFTP.php b/app/code/Transport/SFTP.php
index d171b0b..89978e2 100644
--- a/app/code/Transport/SFTP.php
+++ b/app/code/Transport/SFTP.php
@@ -42,7 +42,7 @@ class Sftp extends TransportAbstract
     public function send()
     {
         $sent = true;
-        $files = $this->backup->getFilesTobackup();
+        $files = $this->backup->getFilesToBackup();
         if (!empty($files)) {
             foreach ($files as $file => $name) {
                 $upload = $this->connection->put($this->folder.'/'.$name, $file, LibSFTP::SOURCE_LOCAL_FILE);
@@ -53,12 +53,12 @@ class Sftp extends TransportAbstract
             }
         }
 
-        $streams = $this->backup->getStreamsTobackup();
+        $streams = $this->backup->getStreamsToBackup();
         if (!empty($streams)) {
             foreach ($streams as $name => $stream) {
                 $upload = $this->connection->put($this->folder.'/'.$name, $stream);
                 if (!$upload) {
-                    echo 'SFTP upload manqu�e de '.$name.' vers '.$this->folder.$name;
+                    echo 'SFTP upload manquée de '.$name.' vers '.$this->folder.$name;
                     $sent = false;
                 }
             }
diff --git a/app/code/backup/BackupAbstract.php b/app/code/backup/BackupAbstract.php
index c555814..95f1eb9 100644
--- a/app/code/backup/BackupAbstract.php
+++ b/app/code/backup/BackupAbstract.php
@@ -151,7 +151,7 @@ abstract class BackupAbstract
         foreach ($this->options as $name => $value) {
             $method = sprintf('setOption%s', ucfirst($name));
             if (method_exists($this, $method)) {
-                call_user_func([$this, $method], $value);
+                $this->$method($value);
             }
         }
 
@@ -174,7 +174,7 @@ abstract class BackupAbstract
         if (touch(TEMP_DIR . $zip_name) === false) {
             throw new \Exception('Backup::Zip::Permission denied.');
         }
-        if ($zip->open(TEMP_DIR . $zip_name, \ZipArchive::OVERWRITE) == true) {
+        if ($zip->open(TEMP_DIR . $zip_name, \ZipArchive::OVERWRITE) === true) {
             foreach ($this->files_to_backup as $file => $name) {
                 $zip->addFile($file, $name); // Adding files into zip
             }
diff --git a/app/code/backup/Files.php b/app/code/backup/Files.php
index 989233e..5b12485 100644
--- a/app/code/backup/Files.php
+++ b/app/code/backup/Files.php
@@ -15,7 +15,7 @@ class Files extends BackupAbstract
         }
         $filesToBackup = $config['files'];
         if (!empty($filesToBackup) && is_array($filesToBackup)) {
-            $names = array_map("basename", $filesToBackup);
+            $names = array_map('basename', $filesToBackup);
             $this->files_to_backup = array_combine($filesToBackup, $names);
         }
         parent::__construct($config);
diff --git a/app/code/backup/Mysql.php b/app/code/backup/Mysql.php
index b02a06b..7fdc58e 100644
--- a/app/code/backup/Mysql.php
+++ b/app/code/backup/Mysql.php
@@ -60,17 +60,15 @@ class Mysql extends BackupAbstract
     */
     private function getFromTables()
     {
-        $return = "";
+        $return = '';
         foreach ($this->tables as $table) {
             if (is_array($table)) {
                 $table = $table[0];
             }
-            $result = $this->pdo->prepare('SELECT * FROM ' . $table);
-            $result->execute();
+            $result = $this->pdo->query('SELECT * FROM ' . $table);
             $num_fields = $result->columnCount();
             $return .= 'DROP TABLE IF EXISTS ' . $table . ';';
-            $result2 = $this->pdo->prepare('SHOW CREATE TABLE ' . $table);
-            $result2->execute();
+            $result2 = $this->pdo->query('SHOW CREATE TABLE ' . $table);
             $row2 = $result2->fetch();
             $return.= "\n\n" . $row2[1] . ";\n\n";
             foreach ($result as $row) {
@@ -123,6 +121,6 @@ class Mysql extends BackupAbstract
     */
     protected function build()
     {
-        empty($this->tables) || $this->tables == '*' ? $this->everything() : $this->fromTables($this->tables);
+        empty($this->tables) || $this->tables === '*' ? $this->everything() : $this->fromTables($this->tables);
     }
 }
diff --git a/composer.json b/composer.json
index 3895545..979de44 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,13 @@
   ],
   "require": {
     "phpseclib/phpseclib": ">=1.0.0",
-    "dropbox/dropbox-sdk": "~1.1"
+    "dropbox/dropbox-sdk": "~1.1",
+    "ext-fileinfo": "*",
+    "ext-zip": "*",
+    "ext-ftp": "*",
+    "ext-pdo": "*",
+    "ext-mbstring": "*",
+    "ext-json": "*"
   },
   "autoload": {
     "classmap": ["app/code/", "vendor/"]