jpeg to odf code example
Example 1: image to pdf
My all time favourite converter:
https://jpg2pdf.com/
Example 2: jpg to pdf
$images = array("your-file.jpg"); //You can use a URL as well
$pdf = new Imagick($images);
$pdf->setImageFormat('pdf');
$pdf->writeImages('combined.pdf', true); //The file name
//When ran, it will save in the same directory as the php file/script