Create thumbnail for jpg or gif or png

[searain]

Question :
How can I create thumbnails using PHP?

Answer :

function thumbnail($image_path,$thumb_path,$image_name,$thumb_width)
{
$src_img = imagecreatefromjpeg("$image_path/$image_name");
$origw=imagesx($src_img);
$origh=imagesy($src_img);
$new_w = $thumb_width;
$diff=$origw/$new_w;
$new_h=$new_w;
$dst_img = imagecreate($new_w,$new_h);
imagecopyresized($dst_img,$src_img,0,0,0,0,$new_w,$new_h,imagesx($src_img),imagesy($src_img));

imagejpeg($dst_img, "$thumb_path/$image_name"); 
return true; 

}

The above will create a hard copy of the JPG.

Are there simple codes like this but also good for gif, png?

Or I just need to copy this script, calling the functions for gif or png, and check to see what image format the image is and calling the right function?

Thanks!

[cahva]

I've been using this:

function image_createThumb($src,$dest,$maxWidth,$maxHeight,$quality=100) {
    if (file_exists($src)  && isset($dest)) {
        // path info
        $destInfo  = pathInfo($dest);

    // image src size
    $srcSize   = getImageSize($src);

    // image dest size $destSize[0] = width, $destSize[1] = height
    $srcRatio  = $srcSize[0]/$srcSize[1]; // width/height ratio
    $destRatio = $maxWidth/$maxHeight;
    if ($destRatio > $srcRatio) {
        $destSize[1] = $maxHeight;
        $destSize[0] = $maxHeight*$srcRatio;
    }
    else {
        $destSize[0] = $maxWidth;
        $destSize[1] = $maxWidth/$srcRatio;
    }

    // path rectification
    if ($destInfo['extension'] == "gif") {
        $dest = substr_replace($dest, 'jpg', -3);
    }

    // true color image, with anti-aliasing
    $destImage = imageCreateTrueColor($destSize[0],$destSize[1]);
    imageAntiAlias($destImage,true);

    // src image
    switch ($srcSize[2]) {
        case 1: //GIF
        $srcImage = imageCreateFromGif($src);
        break;

        case 2: //JPEG
        $srcImage = imageCreateFromJpeg($src);
        break;

        case 3: //PNG
        $srcImage = imageCreateFromPng($src);
        break;

        default:
        return false;
        break;
    }

    // resampling
    imageCopyResampled($destImage, $srcImage, 0, 0, 0, 0,$destSize[0],$destSize[1],$srcSize[0],$srcSize[1]);

    // generating image
    switch ($srcSize[2]) {
        case 1:
        case 2:
        imageJpeg($destImage,$dest,$quality);
        break;

        case 3:
        imagePng($destImage,$dest);
        break;
    }
    return true;
}
else {
    return false;
}
}