how to read pdf in php code example

Example 1: open pdf file in browser php

<?php
    // Store the file name into variable
    $file = 'filename';
    $filepath = "https://www.example.com/".$file;
    // Header content type
    header("Content-type: application/pdf");
    // Send the file to the browser.
    readfile($filepath);

Example 2: php pdf

<?php
// We'll be outputting a PDF
header('Content-Type: application/pdf');

// It will be called downloaded.pdf
header('Content-Disposition: attachment; filename="downloaded.pdf"');

// The PDF source is in original.pdf
readfile('original.pdf');
?>