<?php
/*
-------------------------------------------------------------------------
Credits: Bit Repository
URL: http://www.bitrepository.com/web-programming/php/download-image.html
-------------------------------------------------------------------------
*/
class GetImage {

var $source;
var $save_to;
var $set_extension;
var $quality;

function download($method = 'curl') // default method: cURL
{
$info = @GetImageSize($this->source);
$mime = $info['mime'];

if(!$mime) exit('Could not obtain mime-type information. Make sure that the remote file is actually a valid image.');

// What sort of image?
$type = substr(strrchr($mime, '/'), 1);

switch ($type)
{
case 'jpeg':
    $image_create_func = 'ImageCreateFromJPEG';
    $image_save_func = 'ImageJPEG';
    $new_image_ext = 'jpg';

    // Best Quality: 100
    $quality = isSet($this->quality) ? $this->quality : 100;
    break;

case 'png':
    $image_create_func = 'ImageCreateFromPNG';
    $image_save_func = 'ImagePNG';
    $new_image_ext = 'png';

    // Compression Level: from 0  (no compression) to 9
    $quality = isSet($this->quality) ? $this->quality : 0;
    break;

case 'bmp':
    $image_create_func = 'ImageCreateFromBMP';
    $image_save_func = 'ImageBMP';
    $new_image_ext = 'bmp';
    break;

case 'gif':
    $image_create_func = 'ImageCreateFromGIF';
    $image_save_func = 'ImageGIF';
    $new_image_ext = 'gif';
    break;

case 'vnd.wap.wbmp':
    $image_create_func = 'ImageCreateFromWBMP';
    $image_save_func = 'ImageWBMP';
    $new_image_ext = 'bmp';
    break;

case 'xbm':
    $image_create_func = 'ImageCreateFromXBM';
    $image_save_func = 'ImageXBM';
    $new_image_ext = 'xbm';
    break;

default:
    $image_create_func = 'ImageCreateFromJPEG';
    $image_save_func = 'ImageJPEG';
    $new_image_ext = 'jpg';
}

if(isSet($this->set_extension))
{
$ext = strrchr($this->source, ".");
$strlen = strlen($ext);
$new_name = basename(substr($this->source, 0, -$strlen)).'.'.$new_image_ext;
$new_name = str_replace('%20', '_', $new_name);
}
else
{
$new_name = basename($this->source);
$new_name = str_replace('%20', '_', $new_name);
}

$save_to = $this->save_to.$new_name;

    if($method == 'curl')
    {
    $save_image = $this->LoadImageCURL($save_to);
    }
    elseif($method == 'gd')
    {
    $img = $image_create_func($this->source);

        if(isSet($quality))
        {
           $save_image = $image_save_func($img, $save_to, $quality);
        }
        else
        {
           $save_image = $image_save_func($img, $save_to);
        }
    }

    return $save_image;
}

function LoadImageCURL($save_to)
{
$ch = curl_init($this->source);
$fp = fopen($save_to, "wb");

// set URL and other appropriate options
$options = array(CURLOPT_FILE => $fp,
                 CURLOPT_HEADER => 0,
                 CURLOPT_FOLLOWLOCATION => 1,
                 CURLOPT_TIMEOUT => 60); // 1 minute timeout (should be enough)

curl_setopt_array($ch, $options);

$save = curl_exec($ch);
curl_close($ch);
fclose($fp);

return $save;
}
}
?>