Monday, October 13, 2014

[Solved] How To Increase File Upload size in OpenCart

This article will help you to increase file upload size in OpenCart. If you are a OpenCart beginner and you are facing a problem while updating products on your OpenCart store and you are getting error message about file size go through this article and you are done.

Go to admin > controller > common > filemanager.php

Default filemanager.php
<?php
class ControllerCommonFileManager extends Controller {
 private $error = array();

   public function index() {
  $this->language->load('common/filemanager');

    $this->data['title'] = $this->language->get('heading_title');

    if (isset($this->request->server['HTTPS']) && (($this->request->server['HTTPS'] == 'on') || ($this->request->server['HTTPS'] == '1'))) {
   $this->data['base'] = HTTPS_SERVER;
  } else {
   $this->data['base'] = HTTP_SERVER;
  }

    $this->data['entry_folder'] = $this->language->get('entry_folder');
  $this->data['entry_move'] = $this->language->get('entry_move');
  $this->data['entry_copy'] = $this->language->get('entry_copy');
  $this->data['entry_rename'] = $this->language->get('entry_rename');

    $this->data['button_folder'] = $this->language->get('button_folder');
  $this->data['button_delete'] = $this->language->get('button_delete');
  $this->data['button_move'] = $this->language->get('button_move');
  $this->data['button_copy'] = $this->language->get('button_copy');
  $this->data['button_rename'] = $this->language->get('button_rename');
  $this->data['button_upload'] = $this->language->get('button_upload');
  $this->data['button_refresh'] = $this->language->get('button_refresh');
  $this->data['button_submit'] = $this->language->get('button_submit');

    $this->data['error_select'] = $this->language->get('error_select');
  $this->data['error_directory'] = $this->language->get('error_directory');

    $this->data['token'] = $this->session->data['token'];

    $this->data['directory'] = HTTP_CATALOG . 'image/data/';

    $this->load->model('tool/image');

    $this->data['no_image'] = $this->model_tool_image->resize('no_image.jpg', 100, 100);

    if (isset($this->request->get['field'])) {
   $this->data['field'] = $this->request->get['field'];
  } else {
   $this->data['field'] = '';
  }

    if (isset($this->request->get['CKEditorFuncNum'])) {
   $this->data['fckeditor'] = $this->request->get['CKEditorFuncNum'];
  } else {
   $this->data['fckeditor'] = false;
  }

    $this->template = 'common/filemanager.tpl';

    $this->response->setOutput($this->render());
 } 

   public function image() {
  $this->load->model('tool/image');

    if (isset($this->request->get['image'])) {
   $this->response->setOutput($this->model_tool_image->resize(html_entity_decode($this->request->get['image'], ENT_QUOTES, 'UTF-8'), 100, 100));
  }
 }

   public function directory() { 
  $json = array();

    if (isset($this->request->post['directory'])) {
   $directories = glob(rtrim(DIR_IMAGE . 'data/' . str_replace('../', '', $this->request->post['directory']), '/') . '/*', GLOB_ONLYDIR);

     if ($directories) {
    $i = 0;

      foreach ($directories as $directory) {
     $json[$i]['data'] = basename($directory);
     $json[$i]['attributes']['directory'] = utf8_substr($directory, strlen(DIR_IMAGE . 'data/'));

       $children = glob(rtrim($directory, '/') . '/*', GLOB_ONLYDIR);

       if ($children)  {
      $json[$i]['children'] = ' ';
     }

       $i++;
    }
   }  
  }

    $this->response->setOutput(json_encode($json));  
 }

   public function files() {
  $json = array();

    if (!empty($this->request->post['directory'])) {
   $directory = DIR_IMAGE . 'data/' . str_replace('../', '', $this->request->post['directory']);
  } else {
   $directory = DIR_IMAGE . 'data/';
  }

    $allowed = array(
   '.jpg',
   '.jpeg',
   '.png',
   '.gif'
  );

    $files = glob(rtrim($directory, '/') . '/*');

    if ($files) {
   foreach ($files as $file) {
    if (is_file($file)) {
     $ext = strrchr($file, '.');
    } else {
     $ext = '';
    } 

      if (in_array(strtolower($ext), $allowed)) {
     $size = filesize($file);

       $i = 0;

       $suffix = array(
      'B',
      'KB',
      'MB',
      'GB',
      'TB',
      'PB',
      'EB',
      'ZB',
      'YB'
     );

       while (($size / 1024) > 1) {
      $size = $size / 1024;
      $i++;
     }

       $json[] = array(
      'filename' => basename($file),
      'file'     => utf8_substr($file, utf8_strlen(DIR_IMAGE . 'data/')),
      'size'     => round(utf8_substr($size, 0, utf8_strpos($size, '.') + 4), 2) . $suffix[$i]
     );
    }
   }
  }

    $this->response->setOutput(json_encode($json)); 
 } 

   public function create() {
  $this->language->load('common/filemanager');

    $json = array();

    if (isset($this->request->post['directory'])) {
   if (isset($this->request->post['name']) || $this->request->post['name']) {
    $directory = rtrim(DIR_IMAGE . 'data/' . str_replace('../', '', $this->request->post['directory']), '/');       

      if (!is_dir($directory)) {
     $json['error'] = $this->language->get('error_directory');
    }

      if (file_exists($directory . '/' . str_replace('../', '', $this->request->post['name']))) {
     $json['error'] = $this->language->get('error_exists');
    }
   } else {
    $json['error'] = $this->language->get('error_name');
   }
  } else {
   $json['error'] = $this->language->get('error_directory');
  }

    if (!$this->user->hasPermission('modify', 'common/filemanager')) {
   $json['error'] = $this->language->get('error_permission');
  }

    if (!isset($json['error'])) { 
   mkdir($directory . '/' . str_replace('../', '', $this->request->post['name']), 0777);

     $json['success'] = $this->language->get('text_create');
  } 

    $this->response->setOutput(json_encode($json));
 }

   public function delete() {
  $this->language->load('common/filemanager');

    $json = array();

    if (isset($this->request->post['path'])) {
   $path = rtrim(DIR_IMAGE . 'data/' . str_replace('../', '', html_entity_decode($this->request->post['path'], ENT_QUOTES, 'UTF-8')), '/');

     if (!file_exists($path)) {
    $json['error'] = $this->language->get('error_select');
   }

     if ($path == rtrim(DIR_IMAGE . 'data/', '/')) {
    $json['error'] = $this->language->get('error_delete');
   }
  } else {
   $json['error'] = $this->language->get('error_select');
  }

    if (!$this->user->hasPermission('modify', 'common/filemanager')) {
   $json['error'] = $this->language->get('error_permission');
  }

    if (!isset($json['error'])) {
   if (is_file($path)) {
    unlink($path);
   } elseif (is_dir($path)) {
    $files = array();

      $path = array($path . '*');

      while(count($path) != 0) {
     $next = array_shift($path);

       foreach(glob($next) as $file) {
      if (is_dir($file)) {
       $path[] = $file . '/*';
      }

        $files[] = $file;
     }
    }

      rsort($files);

      foreach ($files as $file) {
     if (is_file($file)) {
      unlink($file);
     } elseif(is_dir($file)) {
      rmdir($file); 
     }
    }    
   }

     $json['success'] = $this->language->get('text_delete');
  }    

    $this->response->setOutput(json_encode($json));
 }

   public function move() {
  $this->language->load('common/filemanager');

    $json = array();

    if (isset($this->request->post['from']) && isset($this->request->post['to'])) {
   $from = rtrim(DIR_IMAGE . 'data/' . str_replace('../', '', html_entity_decode($this->request->post['from'], ENT_QUOTES, 'UTF-8')), '/');

     if (!file_exists($from)) {
    $json['error'] = $this->language->get('error_missing');
   }

     if ($from == DIR_IMAGE . 'data') {
    $json['error'] = $this->language->get('error_default');
   }

     $to = rtrim(DIR_IMAGE . 'data/' . str_replace('../', '', html_entity_decode($this->request->post['to'], ENT_QUOTES, 'UTF-8')), '/');

     if (!file_exists($to)) {
    $json['error'] = $this->language->get('error_move');
   } 

     if (file_exists($to . '/' . basename($from))) {
    $json['error'] = $this->language->get('error_exists');
   }
  } else {
   $json['error'] = $this->language->get('error_directory');
  }

    if (!$this->user->hasPermission('modify', 'common/filemanager')) {
   $json['error'] = $this->language->get('error_permission');
  }

    if (!isset($json['error'])) {
   rename($from, $to . '/' . basename($from));

     $json['success'] = $this->language->get('text_move');
  }

    $this->response->setOutput(json_encode($json));
 } 

   public function copy() {
  $this->language->load('common/filemanager');

    $json = array();

    if (isset($this->request->post['path']) && isset($this->request->post['name'])) {
   if ((utf8_strlen($this->request->post['name']) < 3) || (utf8_strlen($this->request->post['name']) > 255)) {
    $json['error'] = $this->language->get('error_filename');
   }

     $old_name = rtrim(DIR_IMAGE . 'data/' . str_replace('../', '', html_entity_decode($this->request->post['path'], ENT_QUOTES, 'UTF-8')), '/');

     if (!file_exists($old_name) || $old_name == DIR_IMAGE . 'data') {
    $json['error'] = $this->language->get('error_copy');
   }

     if (is_file($old_name)) {
    $ext = strrchr($old_name, '.');
   } else {
    $ext = '';
   }  

     $new_name = dirname($old_name) . '/' . str_replace('../', '', html_entity_decode($this->request->post['name'], ENT_QUOTES, 'UTF-8') . $ext);

     if (file_exists($new_name)) {
    $json['error'] = $this->language->get('error_exists');
   }   
  } else {
   $json['error'] = $this->language->get('error_select');
  }

    if (!$this->user->hasPermission('modify', 'common/filemanager')) {
   $json['error'] = $this->language->get('error_permission');
  }

    if (!isset($json['error'])) {
   if (is_file($old_name)) {
    copy($old_name, $new_name);
   } else {
    $this->recursiveCopy($old_name, $new_name);
   }

     $json['success'] = $this->language->get('text_copy');
  }

    $this->response->setOutput(json_encode($json)); 
 }

   function recursiveCopy($source, $destination) {
  $directory = opendir($source);

    @mkdir($destination);

    while (false !== ($file = readdir($directory))) {
   if (($file != '.') && ($file != '..')) {
    if (is_dir($source . '/' . $file)) {
     $this->recursiveCopy($source . '/' . $file, $destination . '/' . $file);
    } else {
     copy($source . '/' . $file, $destination . '/' . $file);
    }
   }
  }

    closedir($directory);
 }

   public function folders() {
  $this->response->setOutput($this->recursiveFolders(DIR_IMAGE . 'data/')); 
 }

   protected function recursiveFolders($directory) {
  $output = '';

    $output .= '<option value="' . utf8_substr($directory, strlen(DIR_IMAGE . 'data/')) . '">' . utf8_substr($directory, strlen(DIR_IMAGE . 'data/')) . '</option>';

    $directories = glob(rtrim(str_replace('../', '', $directory), '/') . '/*', GLOB_ONLYDIR);

    foreach ($directories  as $directory) {
   $output .= $this->recursiveFolders($directory);
  }

    return $output;
 }

   public function rename() {
  $this->language->load('common/filemanager');

    $json = array();

    if (isset($this->request->post['path']) && isset($this->request->post['name'])) {
   if ((utf8_strlen($this->request->post['name']) < 3) || (utf8_strlen($this->request->post['name']) > 255)) {
    $json['error'] = $this->language->get('error_filename');
   }

     $old_name = rtrim(DIR_IMAGE . 'data/' . str_replace('../', '', html_entity_decode($this->request->post['path'], ENT_QUOTES, 'UTF-8')), '/');

     if (!file_exists($old_name) || $old_name == DIR_IMAGE . 'data') {
    $json['error'] = $this->language->get('error_rename');
   }

     if (is_file($old_name)) {
    $ext = strrchr($old_name, '.');
   } else {
    $ext = '';
   }  

     $new_name = dirname($old_name) . '/' . str_replace('../', '', html_entity_decode($this->request->post['name'], ENT_QUOTES, 'UTF-8') . $ext);

     if (file_exists($new_name)) {
    $json['error'] = $this->language->get('error_exists');
   }   
  }

    if (!$this->user->hasPermission('modify', 'common/filemanager')) {
   $json['error'] = $this->language->get('error_permission');
  }

    if (!isset($json['error'])) {
   rename($old_name, $new_name);

     $json['success'] = $this->language->get('text_rename');
  }

    $this->response->setOutput(json_encode($json));
 }

   public function upload() {
  $this->language->load('common/filemanager');

    $json = array();

    if (isset($this->request->post['directory'])) {
   if (isset($this->request->files['image']) && $this->request->files['image']['tmp_name']) {
    $filename = basename(html_entity_decode($this->request->files['image']['name'], ENT_QUOTES, 'UTF-8'));

      if ((strlen($filename) < 3) || (strlen($filename) > 255)) {
     $json['error'] = $this->language->get('error_filename');
    }

      $directory = rtrim(DIR_IMAGE . 'data/' . str_replace('../', '', $this->request->post['directory']), '/');

      if (!is_dir($directory)) {
     $json['error'] = $this->language->get('error_directory');
    }

      if ($this->request->files['image']['size'] > 300000) {
     $json['error'] = $this->language->get('error_file_size');
    }

      $allowed = array(
     'image/jpeg',
     'image/pjpeg',
     'image/png',
     'image/x-png',
     'image/gif',
     'application/x-shockwave-flash'
    );

      if (!in_array($this->request->files['image']['type'], $allowed)) {
     $json['error'] = $this->language->get('error_file_type');
    }

      $allowed = array(
     '.jpg',
     '.jpeg',
     '.gif',
     '.png',
     '.flv'
    );

      if (!in_array(strtolower(strrchr($filename, '.')), $allowed)) {
     $json['error'] = $this->language->get('error_file_type');
    }

      if ($this->request->files['image']['error'] != UPLOAD_ERR_OK) {
     $json['error'] = 'error_upload_' . $this->request->files['image']['error'];
    }   
   } else {
    $json['error'] = $this->language->get('error_file');
   }
  } else {
   $json['error'] = $this->language->get('error_directory');
  }

    if (!$this->user->hasPermission('modify', 'common/filemanager')) {
   $json['error'] = $this->language->get('error_permission');
  }

    if (!isset($json['error'])) { 
   if (@move_uploaded_file($this->request->files['image']['tmp_name'], $directory . '/' . $filename)) {  
    $json['success'] = $this->language->get('text_uploaded');
   } else {
    $json['error'] = $this->language->get('error_uploaded');
   }
  }

    $this->response->setOutput(json_encode($json));
 }
}

 ?>

 Modified filemanager.php

<?php
class ControllerCommonFileManager extends Controller {
 private $error = array();

  public function index() {
  $this->language->load('common/filemanager');

   $this->data['title'] = $this->language->get('heading_title');

   if (isset($this->request->server['HTTPS']) && (($this->request->server['HTTPS'] == 'on') || ($this->request->server['HTTPS'] == '1'))) {
   $this->data['base'] = HTTPS_SERVER;
  } else {
   $this->data['base'] = HTTP_SERVER;
  }

   $this->data['entry_folder'] = $this->language->get('entry_folder');
  $this->data['entry_move'] = $this->language->get('entry_move');
  $this->data['entry_copy'] = $this->language->get('entry_copy');
  $this->data['entry_rename'] = $this->language->get('entry_rename');

   $this->data['button_folder'] = $this->language->get('button_folder');
  $this->data['button_delete'] = $this->language->get('button_delete');
  $this->data['button_move'] = $this->language->get('button_move');
  $this->data['button_copy'] = $this->language->get('button_copy');
  $this->data['button_rename'] = $this->language->get('button_rename');
  $this->data['button_upload'] = $this->language->get('button_upload');
  $this->data['button_refresh'] = $this->language->get('button_refresh');
  $this->data['button_submit'] = $this->language->get('button_submit');

   $this->data['error_select'] = $this->language->get('error_select');
  $this->data['error_directory'] = $this->language->get('error_directory');

   $this->data['token'] = $this->session->data['token'];

   $this->data['directory'] = HTTP_CATALOG . 'image/data/';

   $this->load->model('tool/image');

   $this->data['no_image'] = $this->model_tool_image->resize('no_image.jpg', 100, 100);

   if (isset($this->request->get['field'])) {
   $this->data['field'] = $this->request->get['field'];
  } else {
   $this->data['field'] = '';
  }

   if (isset($this->request->get['CKEditorFuncNum'])) {
   $this->data['fckeditor'] = $this->request->get['CKEditorFuncNum'];
  } else {
   $this->data['fckeditor'] = false;
  }

   $this->template = 'common/filemanager.tpl';

   $this->response->setOutput($this->render());
 } 

  public function image() {
  $this->load->model('tool/image');

   if (isset($this->request->get['image'])) {
   $this->response->setOutput($this->model_tool_image->resize(html_entity_decode($this->request->get['image'], ENT_QUOTES, 'UTF-8'), 100, 100));
  }
 }

  public function directory() { 
  $json = array();

   if (isset($this->request->post['directory'])) {
   $directories = glob(rtrim(DIR_IMAGE . 'data/' . str_replace('../', '', $this->request->post['directory']), '/') . '/*', GLOB_ONLYDIR);

    if ($directories) {
    $i = 0;

     foreach ($directories as $directory) {
     $json[$i]['data'] = basename($directory);
     $json[$i]['attributes']['directory'] = utf8_substr($directory, strlen(DIR_IMAGE . 'data/'));

      $children = glob(rtrim($directory, '/') . '/*', GLOB_ONLYDIR);

      if ($children)  {
      $json[$i]['children'] = ' ';
     }

      $i++;
    }
   }  
  }

   $this->response->setOutput(json_encode($json));  
 }

  public function files() {
  $json = array();

   if (!empty($this->request->post['directory'])) {
   $directory = DIR_IMAGE . 'data/' . str_replace('../', '', $this->request->post['directory']);
  } else {
   $directory = DIR_IMAGE . 'data/';
  }

   $allowed = array(
   '.jpg',
   '.jpeg',
   '.png',
   '.gif'
  );

   $files = glob(rtrim($directory, '/') . '/*');

   if ($files) {
   foreach ($files as $file) {
    if (is_file($file)) {
     $ext = strrchr($file, '.');
    } else {
     $ext = '';
    } 

     if (in_array(strtolower($ext), $allowed)) {
     $size = filesize($file);

      $i = 0;

      $suffix = array(
      'B',
      'KB',
      'MB',
      'GB',
      'TB',
      'PB',
      'EB',
      'ZB',
      'YB'
     );

      while (($size / 1024) > 1) {
      $size = $size / 1024;
      $i++;
     }

      $json[] = array(
      'filename' => basename($file),
      'file'     => utf8_substr($file, utf8_strlen(DIR_IMAGE . 'data/')),
      'size'     => round(utf8_substr($size, 0, utf8_strpos($size, '.') + 4), 2) . $suffix[$i]
     );
    }
   }
  }

   $this->response->setOutput(json_encode($json)); 
 } 

  public function create() {
  $this->language->load('common/filemanager');

   $json = array();

   if (isset($this->request->post['directory'])) {
   if (isset($this->request->post['name']) || $this->request->post['name']) {
    $directory = rtrim(DIR_IMAGE . 'data/' . str_replace('../', '', $this->request->post['directory']), '/');       

     if (!is_dir($directory)) {
     $json['error'] = $this->language->get('error_directory');
    }

     if (file_exists($directory . '/' . str_replace('../', '', $this->request->post['name']))) {
     $json['error'] = $this->language->get('error_exists');
    }
   } else {
    $json['error'] = $this->language->get('error_name');
   }
  } else {
   $json['error'] = $this->language->get('error_directory');
  }

   if (!$this->user->hasPermission('modify', 'common/filemanager')) {
   $json['error'] = $this->language->get('error_permission');
  }

   if (!isset($json['error'])) { 
   mkdir($directory . '/' . str_replace('../', '', $this->request->post['name']), 0777);

    $json['success'] = $this->language->get('text_create');
  } 

   $this->response->setOutput(json_encode($json));
 }

  public function delete() {
  $this->language->load('common/filemanager');

   $json = array();

   if (isset($this->request->post['path'])) {
   $path = rtrim(DIR_IMAGE . 'data/' . str_replace('../', '', html_entity_decode($this->request->post['path'], ENT_QUOTES, 'UTF-8')), '/');

    if (!file_exists($path)) {
    $json['error'] = $this->language->get('error_select');
   }

    if ($path == rtrim(DIR_IMAGE . 'data/', '/')) {
    $json['error'] = $this->language->get('error_delete');
   }
  } else {
   $json['error'] = $this->language->get('error_select');
  }

   if (!$this->user->hasPermission('modify', 'common/filemanager')) {
   $json['error'] = $this->language->get('error_permission');
  }

   if (!isset($json['error'])) {
   if (is_file($path)) {
    unlink($path);
   } elseif (is_dir($path)) {
    $files = array();

     $path = array($path . '*');

     while(count($path) != 0) {
     $next = array_shift($path);

      foreach(glob($next) as $file) {
      if (is_dir($file)) {
       $path[] = $file . '/*';
      }

       $files[] = $file;
     }
    }

     rsort($files);

     foreach ($files as $file) {
     if (is_file($file)) {
      unlink($file);
     } elseif(is_dir($file)) {
      rmdir($file); 
     }
    }    
   }

    $json['success'] = $this->language->get('text_delete');
  }    

   $this->response->setOutput(json_encode($json));
 }

  public function move() {
  $this->language->load('common/filemanager');

   $json = array();

   if (isset($this->request->post['from']) && isset($this->request->post['to'])) {
   $from = rtrim(DIR_IMAGE . 'data/' . str_replace('../', '', html_entity_decode($this->request->post['from'], ENT_QUOTES, 'UTF-8')), '/');

    if (!file_exists($from)) {
    $json['error'] = $this->language->get('error_missing');
   }

    if ($from == DIR_IMAGE . 'data') {
    $json['error'] = $this->language->get('error_default');
   }

    $to = rtrim(DIR_IMAGE . 'data/' . str_replace('../', '', html_entity_decode($this->request->post['to'], ENT_QUOTES, 'UTF-8')), '/');

    if (!file_exists($to)) {
    $json['error'] = $this->language->get('error_move');
   } 

    if (file_exists($to . '/' . basename($from))) {
    $json['error'] = $this->language->get('error_exists');
   }
  } else {
   $json['error'] = $this->language->get('error_directory');
  }

   if (!$this->user->hasPermission('modify', 'common/filemanager')) {
   $json['error'] = $this->language->get('error_permission');
  }

   if (!isset($json['error'])) {
   rename($from, $to . '/' . basename($from));

    $json['success'] = $this->language->get('text_move');
  }

   $this->response->setOutput(json_encode($json));
 } 

  public function copy() {
  $this->language->load('common/filemanager');

   $json = array();

   if (isset($this->request->post['path']) && isset($this->request->post['name'])) {
   if ((utf8_strlen($this->request->post['name']) < 3) || (utf8_strlen($this->request->post['name']) > 255)) {
    $json['error'] = $this->language->get('error_filename');
   }

    $old_name = rtrim(DIR_IMAGE . 'data/' . str_replace('../', '', html_entity_decode($this->request->post['path'], ENT_QUOTES, 'UTF-8')), '/');

    if (!file_exists($old_name) || $old_name == DIR_IMAGE . 'data') {
    $json['error'] = $this->language->get('error_copy');
   }

    if (is_file($old_name)) {
    $ext = strrchr($old_name, '.');
   } else {
    $ext = '';
   }  

    $new_name = dirname($old_name) . '/' . str_replace('../', '', html_entity_decode($this->request->post['name'], ENT_QUOTES, 'UTF-8') . $ext);

    if (file_exists($new_name)) {
    $json['error'] = $this->language->get('error_exists');
   }   
  } else {
   $json['error'] = $this->language->get('error_select');
  }

   if (!$this->user->hasPermission('modify', 'common/filemanager')) {
   $json['error'] = $this->language->get('error_permission');
  }

   if (!isset($json['error'])) {
   if (is_file($old_name)) {
    copy($old_name, $new_name);
   } else {
    $this->recursiveCopy($old_name, $new_name);
   }

    $json['success'] = $this->language->get('text_copy');
  }

   $this->response->setOutput(json_encode($json)); 
 }

  function recursiveCopy($source, $destination) {
  $directory = opendir($source);

   @mkdir($destination);

   while (false !== ($file = readdir($directory))) {
   if (($file != '.') && ($file != '..')) {
    if (is_dir($source . '/' . $file)) {
     $this->recursiveCopy($source . '/' . $file, $destination . '/' . $file);
    } else {
     copy($source . '/' . $file, $destination . '/' . $file);
    }
   }
  }

   closedir($directory);
 }

  public function folders() {
  $this->response->setOutput($this->recursiveFolders(DIR_IMAGE . 'data/')); 
 }

  protected function recursiveFolders($directory) {
  $output = '';

   $output .= '<option value="' . utf8_substr($directory, strlen(DIR_IMAGE . 'data/')) . '">' . utf8_substr($directory, strlen(DIR_IMAGE . 'data/')) . '</option>';

   $directories = glob(rtrim(str_replace('../', '', $directory), '/') . '/*', GLOB_ONLYDIR);

   foreach ($directories  as $directory) {
   $output .= $this->recursiveFolders($directory);
  }

   return $output;
 }

  public function rename() {
  $this->language->load('common/filemanager');

   $json = array();

   if (isset($this->request->post['path']) && isset($this->request->post['name'])) {
   if ((utf8_strlen($this->request->post['name']) < 3) || (utf8_strlen($this->request->post['name']) > 255)) {
    $json['error'] = $this->language->get('error_filename');
   }

    $old_name = rtrim(DIR_IMAGE . 'data/' . str_replace('../', '', html_entity_decode($this->request->post['path'], ENT_QUOTES, 'UTF-8')), '/');

    if (!file_exists($old_name) || $old_name == DIR_IMAGE . 'data') {
    $json['error'] = $this->language->get('error_rename');
   }

    if (is_file($old_name)) {
    $ext = strrchr($old_name, '.');
   } else {
    $ext = '';
   }  

    $new_name = dirname($old_name) . '/' . str_replace('../', '', html_entity_decode($this->request->post['name'], ENT_QUOTES, 'UTF-8') . $ext);

    if (file_exists($new_name)) {
    $json['error'] = $this->language->get('error_exists');
   }   
  }

   if (!$this->user->hasPermission('modify', 'common/filemanager')) {
   $json['error'] = $this->language->get('error_permission');
  }

   if (!isset($json['error'])) {
   rename($old_name, $new_name);

    $json['success'] = $this->language->get('text_rename');
  }

   $this->response->setOutput(json_encode($json));
 }

  public function upload() {
  $this->language->load('common/filemanager');

   $json = array();

   if (isset($this->request->post['directory'])) {
   if (isset($this->request->files['image']) && $this->request->files['image']['tmp_name']) {
    $filename = basename(html_entity_decode($this->request->files['image']['name'], ENT_QUOTES, 'UTF-8'));

     if ((strlen($filename) < 3) || (strlen($filename) > 255)) {
     $json['error'] = $this->language->get('error_filename');
    }

     $directory = rtrim(DIR_IMAGE . 'data/' . str_replace('../', '', $this->request->post['directory']), '/');

     if (!is_dir($directory)) {
     $json['error'] = $this->language->get('error_directory');
    }

     if ($this->request->files['image']['size'] > 3000000000) {
     $json['error'] = $this->language->get('error_file_size');
    }

     $allowed = array(
     'image/jpeg',
     'image/pjpeg',
     'image/png',
     'image/x-png',
     'image/gif',
     'application/x-shockwave-flash'
    );

     if (!in_array($this->request->files['image']['type'], $allowed)) {
     $json['error'] = $this->language->get('error_file_type');
    }

     $allowed = array(
     '.jpg',
     '.jpeg',
     '.gif',
     '.png',
     '.flv'
    );

     if (!in_array(strtolower(strrchr($filename, '.')), $allowed)) {
     $json['error'] = $this->language->get('error_file_type');
    }

     if ($this->request->files['image']['error'] != UPLOAD_ERR_OK) {
     $json['error'] = 'error_upload_' . $this->request->files['image']['error'];
    }   
   } else {
    $json['error'] = $this->language->get('error_file');
   }
  } else {
   $json['error'] = $this->language->get('error_directory');
  }

   if (!$this->user->hasPermission('modify', 'common/filemanager')) {
   $json['error'] = $this->language->get('error_permission');
  }

   if (!isset($json['error'])) { 
   if (@move_uploaded_file($this->request->files['image']['tmp_name'], $directory . '/' . $filename)) {  
    $json['success'] = $this->language->get('text_uploaded');
   } else {
    $json['error'] = $this->language->get('error_uploaded');
   }
  }

   $this->response->setOutput(json_encode($json));
 }
}

 ?>

 Or you can go to line 436 where you will get this code

if ($this->request->files['image']['size'] > 300000) {
     $json['error'] = $this->language->get('error_file_size');

    }

change 300000 to your need what you required.

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