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@AmrMekkawy
Created August 27, 2018 15:30
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Force download a file with PHP
<?php
/**
* Force Download
*
* Generates headers that force a download to happen
* Example usage:
* force_download( 'screenshot.png', './images/screenshot.png' );
*
* Source: https://goo.gl/fhTaW4
*
* @access public
* @param string $filename
* @param string $data
* @return void
*/
function force_download( $filename = '', $data = '' )
{
if( $filename == '' || $data == '' )
{
return false;
}
if( !file_exists( $data ) )
{
return false;
}
// Try to determine if the filename includes a file extension.
// We need it in order to set the MIME type
if( false === strpos( $filename, '.' ) )
{
return false;
}
// Grab the file extension
$extension = strtolower( pathinfo( basename( $filename ), PATHINFO_EXTENSION ) );
// our list of mime types
$mime_types = array(
'txt' => 'text/plain',
'htm' => 'text/html',
'html' => 'text/html',
'php' => 'text/html',
'css' => 'text/css',
'js' => 'application/javascript',
'json' => 'application/json',
'xml' => 'application/xml',
'swf' => 'application/x-shockwave-flash',
'flv' => 'video/x-flv',
// images
'png' => 'image/png',
'jpe' => 'image/jpeg',
'jpeg' => 'image/jpeg',
'jpg' => 'image/jpeg',
'gif' => 'image/gif',
'bmp' => 'image/bmp',
'ico' => 'image/vnd.microsoft.icon',
'tiff' => 'image/tiff',
'tif' => 'image/tiff',
'svg' => 'image/svg+xml',
'svgz' => 'image/svg+xml',
// archives
'zip' => 'application/zip',
'rar' => 'application/x-rar-compressed',
'exe' => 'application/x-msdownload',
'msi' => 'application/x-msdownload',
'cab' => 'application/vnd.ms-cab-compressed',
// audio/video
'mp3' => 'audio/mpeg',
'qt' => 'video/quicktime',
'mov' => 'video/quicktime',
// adobe
'pdf' => 'application/pdf',
'psd' => 'image/vnd.adobe.photoshop',
'ai' => 'application/postscript',
'eps' => 'application/postscript',
'ps' => 'application/postscript',
// ms office
'doc' => 'application/msword',
'rtf' => 'application/rtf',
'xls' => 'application/vnd.ms-excel',
'ppt' => 'application/vnd.ms-powerpoint',
// open office
'odt' => 'application/vnd.oasis.opendocument.text',
'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
);
// Set a default mime if we can't find it
if( !isset( $mime_types[$extension] ) )
{
$mime = 'application/octet-stream';
}
else
{
$mime = ( is_array( $mime_types[$extension] ) ) ? $mime_types[$extension][0] : $mime_types[$extension];
}
// Generate the server headers
if( strstr( $_SERVER['HTTP_USER_AGENT'], "MSIE" ) )
{
header( 'Content-Type: "'.$mime.'"' );
header( 'Content-Disposition: attachment; filename="'.$filename.'"' );
header( 'Expires: 0' );
header( 'Cache-Control: must-revalidate, post-check=0, pre-check=0' );
header( "Content-Transfer-Encoding: binary" );
header( 'Pragma: public' );
header( "Content-Length: ".filesize( $data ) );
}
else
{
header( "Pragma: public" );
header( "Expires: 0" );
header( "Cache-Control: must-revalidate, post-check=0, pre-check=0" );
header( "Cache-Control: private", false );
header( "Content-Type: ".$mime, true, 200 );
header( 'Content-Length: '.filesize( $data ) );
header( 'Content-Disposition: attachment; filename='.$filename);
header( "Content-Transfer-Encoding: binary" );
}
readfile( $data );
exit;
} // End force_download
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