How to download a file using php?

Question

PHP

In general, it is necessary in the PHP code, when a certain condition is triggered, to start downloading the file. How can this be implemented?

By downloading a file, I mean:
Display a dialog box for downloading a file to the visitor's computer in the browser of the site visitor (or if automatic download is set in his browser, download the file to the visitor's device)

Answer 1

It's a very simple magic (:

<?php
// Имя файла
$fileName = 'path/to/file/1.m4a';

// Посылаем заголовки
header("Content-Type: audio/mp4");
header("Content-Length: " . filesize($fileName));

// Если нужен диалог сохранения, добавляем такой заголовок:
$quoted = sprintf('"%s"', addcslashes(basename($fileName), '"\\'));  // Или любое другое имя файла
header("Content-Disposition: attachment; filename='$quoted'");


// Можно использовать хэндлер файла
$fp = fopen($fileName, 'rb');
fpassthru($fp);

// А можно без хэндлера
readfile($fileName);