Image manipulation cropping, resizeing

cropResizwImg.php

function crop($target, $newcopy, $w, $h, $ext,$horizontal,$vertical){
    $ext = strtolower($ext);
    $size = getimagesize($target);
    $x = $size[0];
    $y = $size[1];
    if($x>$w*2 || $y>$h*2){
        list($w_orig, $h_orig) = getimagesize($target);
        $scale_ratio = $w_orig / $h_orig;
        if (($w / $h) > $scale_ratio) {
            $w = $h * $scale_ratio;
        } else {
            $h = $w / $scale_ratio;
        }
        $img = "";

        if ($ext == "gif"){
            $img = imagecreatefromgif($target);
        } else if($ext =="png"){
            $img = imagecreatefrompng($target);
        } else {
            $img = imagecreatefromjpeg($target);
        }
        $tci = imagecreatetruecolor($w, $h);
        //imagecopyresampled(dst_img, src_img, dst_x, dst_y, src_x, src_y, dst_w, dst_h, src_w, src_h)
        imagecopyresampled($tci, $img, 0, 0, 0, 0, $w*1.2, $h*1.2, $w_orig, $h_orig);
        if ($ext == "gif"){

            header("Content-type: image/gif");
            imagegif($tci,'../../temp/resize.gif');
        } else if($ext =="png"){

            //header("Content-type: image/png");
            imagepng($tci,'../../temp/resize.png');

        } else {
            //header("Content-type: image/jpeg");
            imagejpeg($tci,'../../temp/resize.jpg', 84);
        }
        $target = '../../temp/resize.'.$ext;
    }

    // Create an image from given image
    $im = "";
    if ($ext == "gif"){
        $im = imagecreatefromgif($target);
        //header("Content-type: image/gif");
        imagegif(cropAlign($im, $w, $h, $horizontal, $vertical),$newcopy);
    } else if($ext =="png"){

        $im = imagecreatefrompng($target);
        //header("Content-type: image/png");
        imagepng(cropAlign($im, $w, $h, $horizontal, $vertical),$newcopy);
    } else {

        $im = imagecreatefromjpeg($target);
        //header("Content-type: image/jpeg");
        imagejpeg(cropAlign($im, $w, $h, $horizontal, $vertical),$newcopy);
    }
    unlink($target);
}
function cropAlign($image, $cropWidth, $cropHeight, $horizontalAlign = 'center', $verticalAlign = 'middle') {
    $width = imagesx($image);
    $height = imagesy($image);
    $horizontalAlignPixels = calculatePixelsForAlign($width, $cropWidth, $horizontalAlign);
    $verticalAlignPixels = calculatePixelsForAlign($height, $cropHeight, $verticalAlign);
    return imageCrop($image, [
        'x' => $horizontalAlignPixels[0],
        'y' => $verticalAlignPixels[0],
        'width' => $horizontalAlignPixels[1],
        'height' => $verticalAlignPixels[1]
    ]);
}

function calculatePixelsForAlign($imageSize, $cropSize, $align) {
    switch ($align) {
        case 'left':
        case 'top':
            return [0, min($cropSize, $imageSize)];
        case 'right':
        case 'bottom':
            return [max(0, $imageSize - $cropSize), min($cropSize, $imageSize)];
        case 'center':
        case 'middle':
            return [
                max(0, floor(($imageSize / 2) - ($cropSize / 2))),
                min($cropSize, $imageSize),
            ];
        default: return [0, $imageSize];
    }
}