Resize images with PHP, support PNG, JPG

Question

I am using this class:

class ImgResizer {

function ImgResizer($originalFile = \'$newName\') {
    $this -> originalFile = $originalFile;
}
function resiz         


        

Answer 1

You can try this. Currently it's assuming the image will always be a jpeg. This will allow you to load a jpeg, png, or gif. I haven't tested but it should work.

function resize($newWidth, $targetFile) {
    if (empty($newWidth) || empty($targetFile)) {
        return false;
    }

    $fileHandle = @fopen($this->originalFile, 'r');

    //error loading file
    if(!$fileHandle) {
        return false;
    }

    $src = imagecreatefromstring(stream_get_contents($fileHandle));

    fclose($fileHandle);

    //error with loading file as image resource
    if(!$src) {
        return false;
    }

    //get image size from $src handle
    list($width, $height) = array(imagesx($src), imagesy($src));

    $newHeight = ($height / $width) * $newWidth;

    $tmp = imagecreatetruecolor($newWidth, $newHeight);

    imagecopyresampled($tmp, $src, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);

    //allow transparency for pngs
    imagealphablending($tmp, false);
    imagesavealpha($tmp, true);

    if (file_exists($targetFile)) {
        unlink($targetFile);
    }

    //handle different image types.
    //imagepng() uses quality 0-9
    switch(strtolower(pathinfo($this->originalFile, PATHINFO_EXTENSION))) {
        case 'jpg':
        case 'jpeg':
            imagejpeg($tmp, $targetFile, 95);
            break;
        case 'png':
            imagepng($tmp, $targetFile, 8.5);
            break;
        case 'gif':
            imagegif($tmp, $targetFile);
            break;
    }

    //destroy image resources
    imagedestroy($tmp);
    imagedestroy($src);
}