<?php

    function image_multiline_text($image, $size, $angle, $xpos, $ypos, $color, $font, $text, $max_width) {
        $split = explode(" ", $text);
        $string = "";
        $new_string = "";
        imagettfbbox($size, 0, $font, $text);
        for ($i = 0; $i < count($split); $i++) {
            $new_string.= $split[$i] . " ";
            // check size of string
            $tbbox = imagettfbbox($size, 0, $font, $new_string);
            if ($tbbox[4] < $max_width) {
                $string = $new_string;
            }
            else {
                imagettftext($image, $size, $angle, $xpos, $ypos, $color, $font, $string);
                $string = "";
                $new_string = "";
                $i--;
                $ypos += $size * 1.15;
            }
        }
        return imagettftext($image, $size, $angle, $xpos, $ypos, $color, $font, $string); // "draws" the rest of the string;
    }

    $path = 'template2.png';
    $del = false;
    if ($_FILES['image']['error'] == 0) {   // If file was sent
        $sourcePath = $_FILES['image']['tmp_name'];
        $targetPath = "upload/" . $_FILES['image']['name'];
        move_uploaded_file($sourcePath, $targetPath); // Moving Uploaded file
        $path = "upload/" . $_FILES['image']['name'];
        $del = true;
    }
    $font_file = dirname(__FILE__) . '/font/Lobster.ttf';
    $im = imagecreatefromstring(file_get_contents($path));
    $im_size = getimagesize($path);
    $stamp = imagecreatefrompng('template2.png');
    $stamp_size = getimagesize('template2.png');
    $dw = $im_size[0] - $stamp_size[0];
    $dh = $im_size[1] - $stamp_size[1];
    $res = imagecreatetruecolor($stamp_size[0], $stamp_size[1]);
    if ($im_size[1] / $im_size[0] * $stamp_size[0] > $stamp_size[1]) {
        $scaled = imagecreatetruecolor($stamp_size[0], $im_size[1] / $im_size[0] * $stamp_size[0]);
        imagecopyresized($scaled, $im, 0, 0, 0, 0, $stamp_size[0], $im_size[1] / $im_size[0] * $stamp_size[0], $im_size[0], $im_size[1]);
        imagecopy($scaled, $stamp, 0, (imagesy($scaled) - $stamp_size[1]) / 2, 0, 0, imagesx($stamp), imagesy($stamp));
        imagecopyresized($res, $scaled, 0, 0, 0, (imagesy($scaled) - $stamp_size[1]) / 2, $stamp_size[0], $stamp_size[1], $stamp_size[0], $stamp_size[1]);
    }
    else {
        $scaled = imagecreatetruecolor($im_size[0] / $im_size[1] * $stamp_size[1], $stamp_size[1]);
        imagecopyresized($scaled, $im, 0, 0, 0, 0, $im_size[0] / $im_size[1] * $stamp_size[1], $stamp_size[1], $im_size[0], $im_size[1]);
        imagecopy($scaled, $stamp, (imagesx($scaled) - $stamp_size[0]) / 2, 0, 0, 0, imagesx($stamp), imagesy($stamp));
        imagecopyresized($res, $scaled, 0, 0, (imagesx($scaled) - $stamp_size[0]) / 2, 0, $stamp_size[0], $stamp_size[1], $stamp_size[0], $stamp_size[1]);
    }
    $font_size = 50;
    $color = imagecolorallocate($res, 255, 255, 255);
    $dx = 50;
    $dy = 50;
    $box = image_multiline_text($res, $font_size, 0, $dx, $font_size + $dy, $color, $font_file, $_POST['text'], imagesx($stamp) - $dx);
    imagettftext($res, $font_size, 0, $dx, $box[3] + $font_size + $dy, $color, $font_file, $_POST['tag']);
    ob_start(); // Let's start output buffering.
        imagepng($res); //This will normally output the image, but because of ob_start(), it won't.
        $contents = ob_get_contents(); //Instead, output above is saved to $contents
    ob_end_clean(); //End the output buffer.
    echo "data:image/png;base64," . base64_encode($contents);
    imagepng($res, "upload/post_".$_FILES['image']['name'], 0);
    imagedestroy($im);
    imagedestroy($scaled);
    imagedestroy($res);
    if ($del)
        unlink($path);
?>