downloadController.php

/**
 * Class DownloadFile
 */
Class DownloadFile
{
    public $url = 'http://example.com/image.jpg';
    public $path = '/path/to/write';
 
    private $filename;
    private $file;
    private $mimeType;
    private $extension;
 
    /**
     * DownloadFile constructor.
     */
    public function __construct()
    {
        $this->filename = md5(time().rand(0,999));
    }
 
    /**
     * downloadFile.
     */
    public function downloadFile()
    {
        $this->file = file_get_contents($this->url);
        $this->mimeType = mime_content_type($this->file);
 
        switch($this->mimeType)
        {
            case 'image/gif':
                $this->extension = 'gif';
                break;
 
            case 'image/jpg':
                $this->extension = 'jpg';
                break;
 
            case 'image/jpeg':
                $this->extension = 'jpg';
                break;
 
            default:
                $this->extension = 'unknown';
        }
 
        file_put_contents($this->path.$this->filename.'.'.$this->extension, $this->file);
    }
 
    /**
     * getResponse.
     *
     * @return array
     */
    public function getResponse()
    {
        return [
            'url' => $this->url,
            'path' => $this->path,
            'filename' => $this->filename,
            'mime_type' => $this->mimeType,
            'extension' => $this->extension,
        ];
    }
 
    /**
     * setUrl
     *
     * @param string $url
     */
    public function setUrl(string $url)
    {
        $this->url = $url;
    }
 
    /**
     * setPath
     *
     * @param string $path
     */
    public function setPath(string $path)
    {
        $this->path = $path;
    }
}
 
 
$download = new DownloadFile();
$download->setUrl('http://www.example.com/image.jpg');
$download->setPath('/path/to/write');
$download->downloadFile();
 
$response = $download->getResponse();
 
print '<pre>';
print_r($response);
print '</pre>';