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PHP: How to force user to download file using php?

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Ayyaz Zafarhttps://www.ayyaztech.com
I am Full Stack Web Developer with 10 years of professional Experience. I have following Skills: HTML5, CSS3, Javascript, jQuery, Ajax, PHP, MySQL, jQuery, Angular, React.js, Wordpress, Codeigniter, Laravel, Node.js, Mongo DB, Express.js, GraphQL, Typescript, Apollo and many more..
if(is_file($file_name)) {

	/*
		Do any processing you'd like here:
		1.  Increment a counter
		2.  Do something with the DB
		3.  Check user permissions
		4.  Anything you want!
	*/

	// required for IE
	if(ini_get('zlib.output_compression')) { ini_set('zlib.output_compression', 'Off');	}

	// get the file mime type using the file extension
	switch(strtolower(substr(strrchr($file_name, '.'), 1))) {
		case 'pdf': $mime = 'application/pdf'; break;
		case 'zip': $mime = 'application/zip'; break;
		case 'jpeg':
		case 'jpg': $mime = 'image/jpg'; break;
		default: $mime = 'application/force-download';
	}
	header('Pragma: public'); 	// required
	header('Expires: 0');		// no cache
	header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
	header('Last-Modified: '.gmdate ('D, d M Y H:i:s', filemtime ($file_name)).' GMT');
	header('Cache-Control: private',false);
	header('Content-Type: '.$mime);
	header('Content-Disposition: attachment; filename="'.basename($file_name).'"');
	header('Content-Transfer-Encoding: binary');
	header('Content-Length: '.filesize($file_name));	// provide file size
	header('Connection: close');
	readfile($file_name);		// push it out
	exit();

Source: https://davidwalsh.name/php-force-download

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