\nHi,<\/p>\n
Today we are going to learn about force downloading prompt in PHP.<\/p>\n
While i am doing my projects, i had a requirement for file download, File type will be changed, So i made a research on this and made simple useful script which can be use any where to prompt download by giving path and file name . Let us create a function download_file and pass full file path and filename , we can use third argument to mention the MIME Type of file<\/p>\n
download_file($sourceFile, $fileName, $mime_type = '') \r\n\r\n<\/pre>\nNext we can check whether we have permission to read the file.if not it will return 404 error<\/p>\n
if (!is_readable($sourceFile)) {\r\n header(\"HTTP\/1.1 404 Not Found\");\r\n return;\r\n }<\/pre>\nNow we are going to create an array of list of mime types. so we can compare with this array and set correct header content type<\/p>\n
$mime_types_list = array(\r\n \"gif\" => \"image\/gif\",\r\n \"png\" => \"image\/png\",\r\n \"jpeg\" => \"image\/jpg\",\r\n \"jpg\" => \"image\/jpg\",\r\n \"pdf\" => \"application\/pdf\",\r\n \"csv\" => \"application\/csv\",\r\n \"txt\" => \"text\/plain\",\r\n \"html\" => \"text\/html\",\r\n \"htm\" => \"text\/html\",\r\n \"exe\" => \"application\/octet-stream\",\r\n \"zip\" => \"application\/zip\",\r\n \"doc\" => \"application\/msword\",\r\n \"xls\" => \"application\/vnd.ms-excel\",\r\n \"ppt\" => \"application\/vnd.ms-powerpoint\",\r\n \"php\" => \"text\/plain\"\r\n );\r\n<\/pre>\nNext we are going to set mime type if we already pass the MIME type into function it will take that MIME ,else we are going to use a function pathinfo to retrieve the extension of file and we will compare with already created array to get content type<\/p>\n
$path_parts = pathinfo($sourceFile); \/\/pathinfo \r\n\r\n\r\n\r\n if ($mime_type == '') {\r\n\r\n $file_extension = $path_parts['extension'];\r\n if (array_key_exists($file_extension, $mime_types_list)) {\r\n $mime_type = $mime_types_list[$file_extension];\r\n } else {\r\n $mime_type = \"application\/force-download\";\r\n };\r\n };<\/pre>\nAfter that we will clean and start the output buffer<\/p>\n
@ob_end_clean();<\/pre>\nThen we can set the content type and headers<\/p>\n
if (ini_get('zlib.output_compression'))\r\n ini_set('zlib.output_compression', 'Off');\r\n\r\n header('Content-Type: ' . $mime_type);\r\n header('Content-Disposition: attachment; filename=\"' . $fileName . '\"');\r\n header(\"Content-Transfer-Encoding: binary\");\r\n header('Accept-Ranges: bytes');\r\n header(\"Cache-control: private\");\r\n header('Pragma: private');<\/pre>\nlastly we are going to read each line by line and print that as shown below.<\/p>\n
$chunksize = 1 * (1024 * 1024);\r\n $bytes_send = 0;\r\n if ($sourceFile = fopen($sourceFile, 'r')) {\r\n\r\n\r\n while (!feof($sourceFile) &&\r\n (!connection_aborted())\r\n ) {\r\n $buffer = fread($sourceFile, $chunksize);\r\n print($buffer); \/\/ is also possible\r\n flush();\r\n }\r\n fclose($sourceFile);\r\n } else {\r\n header(\"HTTP\/1.1 505 Internal server error\");\r\n return;\r\n }\r\n\r\n<\/pre>\nThat is it !!!!! Now we can have a look, How we can read the file using created function We can make a path file and the name we want to give while downloading and pass to function . It will download prompt for file. example for reading file and download prompt<\/p>\n
$filepath = 'sample.pdf';\r\n$filename = 'sample.pdf';\r\n\r\ndownload_file($filepath, $filename);\r\nexit;\r\n?>\r\n\r\n<\/pre>\nFull code<\/p>\n
<?php\r\n\r\n\/**\r\n * function to download a file from server\r\n * \r\n * list all the values in grid\r\n * \r\n * @auther Shabeeb <me@blog.shabeebk.com >\r\n * @createdon : 06-08-2014\r\n * @\r\n * \r\n * @param source $sourceFile : file pathe \r\n * @param source $fileName : file name for download \r\n * @param source $mime_type : MIME type optional field\r\n * @return type\r\n * exceptions\r\n * \r\n * \r\n *\/\r\nfunction download_file($sourceFile, $fileName, $mime_type = '') {\r\n\r\n if (!is_readable($sourceFile)) {\r\n header(\"HTTP\/1.1 404 Not Found\");\r\n return;\r\n }\r\n\r\n $size = filesize($sourceFile);\r\n $fileName = rawurldecode($fileName);\r\n\r\n\r\n $mime_types_list = array(\r\n \"gif\" => \"image\/gif\",\r\n \"png\" => \"image\/png\",\r\n \"jpeg\" => \"image\/jpg\",\r\n \"jpg\" => \"image\/jpg\",\r\n \"pdf\" => \"application\/pdf\",\r\n \"csv\" => \"application\/csv\",\r\n \"txt\" => \"text\/plain\",\r\n \"html\" => \"text\/html\",\r\n \"htm\" => \"text\/html\",\r\n \"exe\" => \"application\/octet-stream\",\r\n \"zip\" => \"application\/zip\",\r\n \"doc\" => \"application\/msword\",\r\n \"xls\" => \"application\/vnd.ms-excel\",\r\n \"ppt\" => \"application\/vnd.ms-powerpoint\",\r\n \"php\" => \"text\/plain\"\r\n );\r\n\r\n $path_parts = pathinfo($sourceFile); \/\/pathinfo \r\n\r\n\r\n\r\n if ($mime_type == '') {\r\n\r\n $file_extension = $path_parts['extension'];\r\n if (array_key_exists($file_extension, $mime_types_list)) {\r\n $mime_type = $mime_types_list[$file_extension];\r\n } else {\r\n $mime_type = \"application\/force-download\";\r\n };\r\n };\r\n\r\n @ob_end_clean();\r\n\r\n \/\/ if IE, otherwise Content-Disposition ignored\r\n if (ini_get('zlib.output_compression'))\r\n ini_set('zlib.output_compression', 'Off');\r\n\r\n header('Content-Type: ' . $mime_type);\r\n header('Content-Disposition: attachment; filename=\"' . $fileName . '\"');\r\n header(\"Content-Transfer-Encoding: binary\");\r\n header('Accept-Ranges: bytes');\r\n header(\"Cache-control: private\");\r\n header('Pragma: private');\r\n\r\n\r\n $chunksize = 1 * (1024 * 1024);\r\n $bytes_send = 0;\r\n if ($sourceFile = fopen($sourceFile, 'r')) {\r\n\r\n\r\n while (!feof($sourceFile) &&\r\n (!connection_aborted())\r\n ) {\r\n $buffer = fread($sourceFile, $chunksize);\r\n print($buffer); \/\/ is also possible\r\n flush();\r\n }\r\n fclose($sourceFile);\r\n } else {\r\n header(\"HTTP\/1.1 505 Internal server error\");\r\n return;\r\n }\r\n\r\n die();\r\n}\r\n\r\n$filepath = 'sample.pdf';\r\n$filename = 'sample.pdf';\r\n\r\ndownload_file($filepath, $filename);\r\nexit;\r\n?>\r\n<\/pre>\nDownload the source<\/p>\n
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