elFinder\elFinderVolumeDriver::upload PHP Method

    public function upload($fp, $dst, $name, $tmpname)
    {
        if ($this->commandDisabled('upload')) {
            return $this->setError(elFinder::ERROR_PERM_DENIED);
        }
        if (($dir = $this->dir($dst)) == false) {
            return $this->setError(elFinder::ERROR_TRGDIR_NOT_FOUND, '#' . $dst);
        }
        if (!$dir['write']) {
            return $this->setError(elFinder::ERROR_PERM_DENIED);
        }
        if (!$this->nameAccepted($name)) {
            return $this->setError(elFinder::ERROR_INVALID_NAME);
        }
        $mime = $this->mimetype($this->mimeDetect == 'internal' ? $name : $tmpname, $name);
        if ($mime == 'unknown' && $this->mimeDetect == 'internal') {
            $mime = elFinderVolumeDriver::mimetypeInternalDetect($name);
        }
        // logic based on http://httpd.apache.org/docs/2.2/mod/mod_authz_host.html#order
        $allow = $this->mimeAccepted($mime, $this->uploadAllow, null);
        $deny = $this->mimeAccepted($mime, $this->uploadDeny, null);
        $upload = true;
        // default to allow
        if (strtolower($this->uploadOrder[0]) == 'allow') {
            // array('allow', 'deny'), default is to 'deny'
            $upload = false;
            // default is deny
            if (!$deny && $allow === true) {
                // match only allow
                $upload = true;
            }
            // else (both match | no match | match only deny) { deny }
        } else {
            // array('deny', 'allow'), default is to 'allow' - this is the default rule
            $upload = true;
            // default is allow
            if ($deny === true && !$allow) {
                // match only deny
                $upload = false;
            }
            // else (both match | no match | match only allow) { allow }
        }
        if (!$upload) {
            return $this->setError(elFinder::ERROR_UPLOAD_FILE_MIME);
        }
        if ($this->uploadMaxSize > 0 && filesize($tmpname) > $this->uploadMaxSize) {
            return $this->setError(elFinder::ERROR_UPLOAD_FILE_SIZE);
        }
        $dstpath = $this->decode($dst);
        $test = $this->_joinPath($dstpath, $name);
        $file = $this->stat($test);
        $this->clearcache();
        if ($file) {
            // file exists
            if ($this->options['uploadOverwrite']) {
                if (!$file['write']) {
                    return $this->setError(elFinder::ERROR_PERM_DENIED);
                } elseif ($file['mime'] == 'directory') {
                    return $this->setError(elFinder::ERROR_NOT_REPLACE, $name);
                }
                $this->remove($test);
            } else {
                $name = $this->uniqueName($dstpath, $name, '-', false);
            }
        }
        $stat = array('mime' => $mime, 'width' => 0, 'height' => 0, 'size' => filesize($tmpname));
        // $w = $h = 0;
        if (strpos($mime, 'image') === 0 && ($s = getimagesize($tmpname))) {
            $stat['width'] = $s[0];
            $stat['height'] = $s[1];
        }
        // $this->clearcache();
        if (($path = $this->_save($fp, $dstpath, $name, $stat)) == false) {
            return false;
        }
        return $this->stat($path);
    }