How to implement forced downloading of files or images in php

This article mainly introduces the method of forced downloading of files or pictures in PHP, and implements simple reading and output related operation skills of files or pictures through custom functions. Friends in need can refer to the following

for details As follows:

//下载
function downregcaseAction() {
  $file="upload/regcase.jpg";
  if(isfile($file)) {
    header("Content-Type: application/force-download");
    header("Content-Disposition: attachment; filename=".basename(file));
    readfile(file);
    exit;
  } else {
    echo "文件不存在！";
    exit;
  }
}

The above is the entire content of this article, I hope it will be helpful to everyone's study.

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