View difference between Paste ID: uTpYYYyn and 92bYZa6N

 <?php
 
 /**
 * krs1911@gmail.com
 */
 
 /**
 * You can add more file inputs by just copying & pase line
 * <input name='p1' type='file' accept='<?= implode(',', $settings['ext']); ?>' />
 * remember about changing the field name eg. p2, p3, p4, ...
 */
 
 /* ----------------------------------------------- */
 /* SETTINGS */
 /* ----------------------------------------------- */
 
 $settings = array(
     //Maximum file size defined in Bytes. However it depends on what values are set for directives in php.ini: upload_max_filesize, post_max_size and memory_limit
     'file_maxsize'  => 5000000,
 
     // Accepted extensions
     'ext'           => array(
         'image/gif'
     ),
 
     // Directory where files should be placed. Note this is relative path, so folder images/ will be serached in the same location as script execution
     'dir'           => 'images/',
 
     'handleUps'             => true, // Upload enabled/disabled -> options: true/false
     'createDirIfNoExist'    => true, // Create output directory (specified at 'dir') when doesn't exist. Options true/false
     'allowNoFile'           => false // Allow to execute script if no file has been selected for at least one file field. Options true/false
 );
 
 /* ----------------------------------------------- */
 /* NO MORE FURTHER EDITING NEEDED */
 /* ----------------------------------------------- */
 
 try
 {
     // Check if file handling on and ifdata has been sent
     if ($settings['handleUps'] && array_key_exists('send', $_POST))
     {
         // yes - proceed
         $errors = array();
 
         // Check if files has been sent without any problems
         foreach ($_FILES as $fieldname => $fileprop)
         {
             // Check file error
             if ($fileprop != UPLOAD_ERR_OK)
             {
                 switch ($fileprop['error'])
                 {
                     case UPLOAD_ERR_INI_SIZE:
                     case UPLOAD_ERR_FORM_SIZE:
                         $errors[] = 'File '.$fileprop['name'].' is too big (maximum size is '.sizeFormat($settings['file_maxsize'], 'MB').')';
                     break;
                     case UPLOAD_ERR_PARTIAL:
                     case UPLOAD_ERR_NO_TMP_DIR:
                     case UPLOAD_ERR_CANT_WRITE:
                         $errors[] = 'File '.$fileprop['name'].' wasn\'t succesfully uploaded.';
                     break;
                     case UPLOAD_ERR_NO_FILE:
                         if (!$settings['allowNoFile'])
                         {
                             $errors[] = 'No file has been selected at field '.$fieldname.'.';
                         }
                     break;
                     case UPLOAD_ERR_EXTENSION:
                         $errors[] = 'File '.$fileprop['name'].' extension is not correct.';
                     break;
                 }
             }
         }
 
         // If there are errors -> do not proceed
         if (!empty($errors))
         {
             throw new Exception(implode('<br />', $errors));
         }
 
         // Create target directory if not exists and if script allowed to
-        if (!file_exists($settings['dir']) && !mkdir($settings['dir'], 0777))
+        if (!file_exists($settings['dir']))
         {
-            throw new Exception('Target directory error.');
+            if (!$settings['createDirIfNoExist'])
             {
                 throw new Exception('Target directory does not exists.');
             }
 
             if (!mkdir($settings['dir'], 0777))
             {
                 throw new Exception('Target directory error.');
             }
         }
 
         // Continue with checking size, veryfing extensions and moving files to te proper directory
         $filesExt = array();
 
         foreach ($_FILES as $filename => $fileprop)
         {
             try
             {
                 // If file is uploaded one
                 if (!is_uploaded_file($fileprop['tmp_name']))
                 {
                     throw new Exception('There was a problem with handling '.$fileprop['name'].' file.');
                 }
 
                 // Filesize
                 if ($fileprop['size'] > $settings['file_maxsize'])
                 {
                     throw new Exception('File '.$fileprop['name'].' is too big (maximum size is '.sizeFormat($settings['file_maxsize']).').');
                 }
 
                 // Check claimed extension
                 if (!in_array($fileprop['type'], $settings['ext']))
                 {
                     throw new Exception('File '.$fileprop['name'].' has inapropriate extension.');
                 }
 
                 // Verify extension
                 if (class_exists('finfo') && floatval(phpversion()) >= 5.3)
                 {
                     $finfo = finfo_open(FILEINFO_MIME_TYPE);
                     $type = finfo_file($finfo, $fileprop['tmp_name']);
                 }
                 else if (function_exists('exif_imagetype'))
                 {
                     $type = exif_imagetype($fileprop['tmp_name']);
                 }
                 else
                 {
                     $type = $fileprop['type'];
                 }
 
                 if (!in_array($type, $settings['ext']))
                 {
                     throw new Exception('File '.$fileprop['name'].' has inappropriate extension.');
                 }
 
                 // Save ext
                 $filesExt[$filename] = end(explode('/', $type));
             }
             catch (Exception $ex)
             {
                 $errors[] = $ex->getMessage();
             }
         }
 
         // Save files only if there are no errors
         if (!empty($errors))
         {
             throw new Exception(implode('<br />', $errors));
         }
 
         foreach ($_FILES as $filename => $fileprop)
         {
             // Move uploaded file
             if (!move_uploaded_file($fileprop['tmp_name'], $settings['dir'].time().'.'.$filesExt[$filename]))
             {
                 throw new Exception('File '.$fileprop['name'].' couldn\'t be saved.');
             }
         }
     }
 }
 catch (Exception $ex)
 {
     echo '<div style=\'border: 1px solid red; background-color: rgba(255, 0, 0, 0.1); color: red; padding: 15px; text-align: center;\'>'.$ex->getMessage().'</div>';
 }
 
 function sizeFormat($size, $format)
 {
     switch ($format)
     {
         case 'GB': $size /= 1000;
         case 'MB': $size /= 1000;
         case 'KB': $size /= 1000;
     }
 
     return $size.' '.$format;
 }
 
 ?>
 
 <form method='post' enctype='multipart/form-data'>
     <input name='MAX_FILE_SIZE' type='hidden' value='<?= $settings['file_maxsize']; ?>' />
     <input name='p1' type='file' accept='<?= implode(',', $settings['ext']); ?>' />
     <input name='send' type='submit' value='Send' />
 </form>