In this example first, we are declaring the file name to be read and opening that with the function fopen(). Edit: The reason you get this complaint a lot from iPhone users is probably that they have a slower connection (e.g. See the Supported Protocols and Wrappers for links to information about what abilities the various wrappers have, notes on their usage, and information on any predefined variables they may provide. Patches Add a Patch Pull Requests This is far from ideal, and there is no way of knowing whether users have this option checked or not. That is why in my library I use a helper function ("speedLimit") to calculate whether selected speed limit will fit the available memory (while allowing some headroom). In the first, we need to know what the data is. The readfile () function reads a file and writes it to the output buffer. Piece 1 loads WordPress and performs the logic validation. Would salt mines, lakes or flats be reasonably found in high, snowy elevations? As in all the above examples, first, we are giving the file name which needs to be read from. Is it correct to say "The glue on the back of the sticker is dying down so I can not stick the sticker to the wall"? $context specifies the stream context. Ive tried with the function read() and file_get_contents but the problem still present. We might use the Zip extension: This is a neat bit of code, but it clocks in at around 10.75MB. The PHP engine does a stellar job of cleaning up after us, and the web server model of short-lived execution contexts means even the sloppiest code has no long-lasting effects. To learn more, see our tips on writing great answers. If you dont want to expose the location of the file, or the file isnt in a public location then look into internal redirects, here is a post that talks about it a bit, Can I tell Apache to do an internal redirect from PHP? If you can apply filters to stream_copy_to_stream operations, your applications are going to use next to no memory even when working with obscenely large files. php://memory and php://temp (read-write) are places we can store data temporarily. PHP optionally supports buffering of output sent by a script. Of course you need to setup the DB, table, and columns. Something like this: Any guesses how much memory were using now? What follows is the file I am trying to build for file downloads. This article was posted in Code, PHP Tutorials, Tips & Tricks. Wed need to keep at least 10,000 lines in memory, and pass them along to the queued job manager (whatever form that may take). We can use this function to read a large file line by line. flobee.at.gmail.dot.com shared "readfile_chunked" function. We set a few headers and open a file handle to the API. Try using stream_copy_to_stream() instead. Is Energy "equal" to the curvature of Space-Time? All works fine, if the Passthrough-File is smaller than approx. stream_copy_to_stream is reading from one stream, one line at a time, and writing it to the other stream. // formatBytes is taken from the php.net documentation, "https://github.com/assertchris/uploads/raw/master/rick.jpg", // or write this straight to stdout, if we don't need the memory info, "php://filter/zlib.deflate/resource=shakespeare.txt", "php://filter/zlib.inflate/resource=filters-2.deflated", "Content-type: application/x-www-form-urlencoded", 3 UX Mistakes That Are Killing Your Design, OCR in PHP: Read Text from Images with Tesseract, Freelancers: Bad Time Estimates Are Killing Your Profits. TOP 10 loi hoa ban cng chu nng gii, chu hn tt, 8 loi hoa trng ban cng chu nng cc tt, Tuyn chn 15 loi HOA HNG NGOI p, thm v d chm sc. Meanwhile "stream_copy_to_stream" seems to utilize the same amount of memory as "readfile". I am using header("Location: ") now and it does reveal where the files are (I just have to manage two archives now: a web-reachable public file store and the non-reachable private store. prefixing it with a directory), you should use include instead. 100k. ', 'http://example.com/'. In this case, the largest chunk is 101,985 characters. For small files, that may be okay. // set the download rate limit (=> 20,5 kb/s), // send the current file part to the browser. This function gives you more options than the readfile () function. However, if this setting is checked, and browser windows are being re-used, then it will open up on top of the page where the link was clicked to access the script. Before we wrap things up, lets talk about making custom protocols. When would I give a checkpoint to my D&D party that they can return to if they die? Eg. We could illustrate it with code resembling the following: Imagine an application route brought us to this code. Imagine we wanted to compress our shakespeare.txt. I noticed you have several Subdomains, and each one is essentially . Mi bn xem phin bn y ti y https://divin.dev/python/2022/03/14/20-bai-tap-python.html Bi 1. "";"); header("Content-Transfer-Encoding: binary"); header("Content-Length: "[emailprotected]($filename)); set_time_limit(0); @readfile("$fileurl") or die("File not found. demand pull; hence, studies are not pulled to a workstation unless a user actually requests and views them. Thats because the second argument to fgets specifies how many bytes of each line to read (and defaults to -1 or until it reaches a new line). To avoid errors, just be careful whether slash "/" is allowed or not at the beginning of $file_name parameter. This would likely be the case if you're using PHP for caching or even to create a makeshift proxy server. This was the only way I found to both protect and transfer very large files with PHP (gigabytes). Remember if you make a "force download" script like mentioned below that you SANITIZE YOUR INPUT! But there are also two likely scenarios in which we could use them. One functions as "PDF-Passthrough". The readfile () function has the following parameters: $filename is the path to the file. I switched over to. It may surprise you to know that the memory used is 393KB. $pic .'.'. I tried replacing just the readfile line and the error still showed up. If unsuccessful, readfile () will return false, and there are quite a few reasons why it may file. The file echo.php generates a series of 1000 consecutive "x"s.The data is emitted with intervals of 50ms (usleep(50 * 1000)), in 10 chunks sized 99bytes, plus one final chunk of 10bytes (99*10 + 10 = 1000).The script test.php fetches the data from the url /echo.php of the local web server.file_get_contents is passed a context with a notification callback. Verify content (via View Source) looks like it should (Make sure PHP isnt throwing a warning in, and that the content looks like it should as if you'd. Refresh page. Well look at how much memory is used in traditional scripts. return $status; If you are lucky enough to not be on shared hosting and have apache, look at installing mod_xsendfile. In traditional PHP architecture, these generally become a problem when either one reaches the limits of the server. "test test.pdf"). Only thing that I could get to work. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. regarding php5: i found out that there is already a disscussion @php-dev about readfile() and fpassthru() where only exactly 2 MB will be delivered. This library allows reading, creating, and writing spreadsheet documents in PHP. The text file is about 5.5MB, and the peak memory usage is 12.8MB. Return Values Returns the number of bytes read from the file on success, or false on failure There are loads of things we can customize, so its best to check out the documentation if you want to know more. Just a note for those who face problems on names containing spaces (e.g. Do I need Content-Type: application/octet-stream for file download? Write/Read files 3. Assume we have a text file called "webdictionary.txt", stored on the server, that looks like this: The PHP code to read the file and write it to the output buffer is as follows (the readfile () function returns the number of bytes read on success): Although the same php file was handling a different type of download I was having issues with PNG and ICO, I tried some methods that only displayed the picture but did not prompt for a download box. In contrast, if you're simply echoing a large amount of text with little modification, file, file_get_contents, or readfile might make more sense. $filename = "file.csv"; $filepath = "/path/to/file/" . Last Updated : 14 Jul, 2021 Read There is no difference between using readfile, fpassthru, or . Flags are the optional fields which can be chosen from the below constants: It returns the file present in the array upon success and false upon failure. 'Cache-Control: public, must-revalidate, max-age=0'. Search for jobs related to Audacity failed to read from a file in c or hire on the world's largest freelancing marketplace with 22m+ jobs. In response to "grey - greywyvern - com": If you know the target _can't_ be a remote file (e.g. Open a file (if present) 2. Looks like I'll need to re-write this as an ASP.NET app if I want "flush and complete execution while the web server handles getting the file to the client" functionality. The interesting thing is that this is only to do with writes to sockets opened by streams (so it should not affect PHP output). For more information, see the Remarks section. Piece 1 loads WordPress and performs the logic validation. THE CERTIFICATION NAMES ARE THE TRADEMARKS OF THEIR RESPECTIVE OWNERS. How is the merkle root verified if the mempools may be different? rev2022.12.9.43105. When I try to download a file lower than 25mb there is no problem, when the file is bigger, the file downloaded is 0 bytes. Suppose if the file_name is a local file then PHP tries to open the same stream on that file. Did the apostolic or early church fathers acknowledge Papal infallibility? Hi vng, 8 Loi hoa lu tn nht cho m ci sn vn, m ci ngoi tri, 'Content-Disposition:attachment;filename="', fpassthru() Output all remaining data on a file pointer, virtual() Perform an Apache sub-request, file_get_contents() Reads entire file into a string. bytes delivered like readfile() does. } Thats because it has to read (and keep) the file contents in memory until it has written to the new file. Asking for help, clarification, or responding to other answers. Like I said, I am not sure why this worked, however a friend who knows PHP better than I do said that sometimes if the script takes too long to process then the headers won't take. A protip by mohmedsalem about php, nodejs, reading, large files, reading a 2gb text file, and nodejs vs php. Once verified, infringing content will be . When would I give a checkpoint to my D&D party that they can return to if they die? 3G). Hello atef81, You are very welcome! at Apache/CGI level) that you have no control over on a shared server. How do you parse and process HTML/XML in PHP? All my PDFs and DOCs are less than 100k. Find centralized, trusted content and collaborate around the technologies you use most. fread() reads up to length bytes from the file pointer referenced by stream.Reading stops as soon as one of the following conditions is met: length bytes have been read ; EOF (end of file) is reached a packet becomes available or the socket timeout occurs (for network streams) ; if the stream is read buffered and it does not represent a plain file, at most one read of up to a number of bytes . This leads me to suspect that when using readfile() the PHP script engine is in use until the file is fully downloaded but I cannot find any references which confirm or deny this theory. We dont care what it says, but we need to make sure its backed up in a compressed form. This was just what I needed after messing with this for over an hour. open_basedir can be edited via php.ini. Files >100k make the system hang. In both scenarios, we need to read large files. 2022 - EDUCBA. The readfile is always completed even if it exceed the default 30 seconds limit, then the script is aborted. c bit l khi bn c vi, ng dng nhn tin Messenger ca facebook trn in thoi hin c thm hiu ng t ng, y l mt tnh nng mi cho php bn ci t nhng cm, Bi vit ny nm trong seri: Bin no trong PHP lu tr thng tin v pha ngi dng c ngay hiu do i ng xy dng website Wiki, Kt lun:Trn y, Ben Computer hng dn cc bn cch ly nhc tiktok lm nhc chung in thoi n gin d hiu trn c Iphone v Android. Examples of frauds discovered because someone tried to mimic a random sequence. The readfile is always completed even if it exceed the default 30 seconds limit, then the script is aborted. Well implement a couple of optimization strategies and measure those too. ! The difference is that php://temp will store the data in the file system once it becomes large enough,. Not sure if it was just me or something she sent to the whole team. Apache has a file called "mime.types" which can (in normal case) be read by all users. $use_include_path if set to true, the function will search for the file in the include path. (I am also new to PHP, so if there is something that I am missing, please share.). Tng hp 30+ cy trng ban cng chu nng l tng cho mi gia nh. Its not often that we, as PHP developers, need to worry about memory management. We can achieve this by using stream methods. context A context stream resource. Why is apparent power not measured in Watts? but Chrome gives you ERR_FILE_NOT_FOUND and Firefox also fails with "Not found" (strangely Opera seems to work) try adding: Chrome was telling me: "Error 6 (net::ERR_FILE_NOT_FOUND): The file or directory could not be found." This fixed my problem. to avoid the risk of choosing themselves which files to download by messing with the request and doing things like inserting "../" into the "filename", simply remember that urls are not file paths, and there's no reason why the mapping between them has to be so literal as "download.php?file=thingy.mpg" resulting in the download of the file fread (), fgets (), feof () and fgetc () functions are used to PHP read file information. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content, Script performing file transfer results in "bad" file, PHP readfile() on large pdf crashes Google Cloud server, PHP - How to deliver a local file efficiently, How to download image from php file with javascript, PHP script serving files stops after few seconds, startsWith() and endsWith() functions in PHP. This doesnt mean anything until we do something with the data were reading. Every Frame is PHP-generated. $fad; @Elliott Brueggeman What's the point of a user's settings if not to determine their environment? Lets first write a script to transfer from one file to another, so that we can measure the memory usage: Unsurprisingly, this script uses slightly more memory to run than the text file it copies. if you need to limit download rate, use this code, 20,5 kb/s)$download_rate = 20.5; if(file_exists($local_file) && is_file($local_file)) { header('Cache-control: private'); header('Content-Type: application/octet-stream'); header('Content-Length: '.filesize($local_file)); header('Content-Disposition: filename='.$download_file);flush(); $file = fopen($local_file, "r"); while(!feof($file)) { // send the current file part to the browser print fread($file, round($download_rate * 1024)); // flush the content to the browser flush(); // sleep one second sleep(1); } fclose($file);} else { die('Error: The file '.$local_file.' This library allows reading and writing spreadsheet files . Then we copy from the first into the second. On the MSDN, the error code 1 is ERROR_INVALID_FUNCTION and, in this case, it is in regards to the call to ReadFile . Handling large file sizes. Be warned that you can get very odd behaviour not only on large files, but also on small files if the user has a slow connection. But in one particular server it does not work for files bigger than 25mb. This is a guide toPHP readfile. Theres a lot of work that needs to be done. The file will be accessible by PHP only if required permissions are granted for its access. How do you parse and process HTML/XML in PHP? There is no difference between using readfile, fpassthru, or fread. The file is read until it reaches one of the below conditions: length in bytes must have been read, EOF is reached, socket timeout occurs. Close this file L Open File Before opening a file, we need to know the path to the file and whether or not this file exists. The solution is straight forward. The API endpoint is secure, but we still need to use the http context property (as is used for http and https). Now, lets use a generator to read each line: The text file is the same size, but the peak memory usage is 393KB. This means that the ReadFile function is not completing properly. I also tried commenting out all the header lines in favor of this code and it flowed the file in the browser. Definition and Usage The readfile () function reads a file and writes it to the output buffer. It is used to download a file through the readfile php function. PHP readfile () Function. But once that work is done, we can register our stream wrapper quite easily: Similarly, its also possible to create custom stream filters. Basically, don't go disabling your time limits without putting some real thought into it. By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to our Privacy Policy, Explore 1000+ varieties of Mock tests View more, Special Offer - PHP Training (5 Courses, 3 Project) Learn More, 600+ Online Courses | 50+ projects | 3000+ Hours | Verifiable Certificates | Lifetime Access, Java Servlet Training (6 Courses, 12 Projects), All in One Software Development Bundle (600+ Courses, 50+ projects), Software Development Course - All in One Bundle. $filename . your download will end early and you will not get the complete . Send file with HTTPRange support (partial download): It can be slow for big files to read by fread, but this is a single way to read file in strict bounds. If youd like a different perspective, check those out! In this example, let us see how to read and display the output of a file by using certain conditions. # Protect Script against SQL-Injections $fileid=intval($_GET[id]); # setup SQL statement $sql = " SELECT id, fileurl, filename, filesize FROM ibf_movies WHERE id=' $fileid' "; # execute SQL statement $res = mysql_query($sql); # display results while ($row = mysql_fetch_array($res)) { $fileurl = $row['fileurl']; $filename= $row['filename']; $filesize= $row['filesize']; $file_extension = strtolower(substr(strrchr($filename,". Of course, this is not required if you are using the intelligent versions of readfile in this article. CRTL+F5 var http = require ('http'); Step 2 (Using http and JSON.stringify to return JSON data): We will now use http.createServer and JSON.stringify to return JSON data from our server.. "/> bypass iphone icloud . Is there a verb meaning depthify (getting more depth)? That'd also answer your questions - if you allow unlimited execution time and the readfile version DOESN'T abort, then you've got your answer. Why is apparent power not measured in Watts? One functions as "PDF-Passthrough". IMPORTANT INFO - PLEASE READ----- File will not work on a mobile device. white space) after the readfile function (by mistake), the browser will add that to the end of the download, resulting in corrupt data. Would it surprise you to know that, even though we split the text document up into 1,216 chunks, we still only use 459KB of memory? where file_name is the path to the file to be read. Using readfile() to send large files causes PHP to hang: Submitted: 2004-08-23 19:47 UTC: Modified: 2004-11-16 00:55 UTC: Votes: 4: . By signing up, you agree to our Terms of Use and Privacy Policy. I have a piece of code that works well on many servers. As seen from all the above examples, readfile() is one of the main functions of PHP used for reading the file name specified in this function. This function can be used to open both a file and a URL. Given the nature of generators, the most memory well use is that which we need to store the largest text chunk in an iteration. Amazingly simple solution that doesn't require the troublesome X-Sendfile and it works great. Just a note: If you're using bw_mod (current version 0.6) to limit bandwidth in Apache 2, it *will not* limit bandwidth during readfile events. Making users download the file directly is much more efficient, and does not have PHP's limitations like the maximum execution time. Nhp vo s nguyn dng n in ra s ch s ca n python, Ti nhc t nhaccuatui v android nm u, Top 20 ca hng android Thnh ph Rch Gi Kin Giang 2022, Trong ngn ng lp trnh python mun kim tra ng thi c ba gi tr, Cch ci nhc chung t tiktok cho android, S quan qun i Cng an khng c lm nhng vic g, Top 2 ca hng loa i Huyn Hong Sa Nng 2022. To reduce the burden on the server, you might want to output "Etag" and/or "Last-Modified" on http response header. try streaming a 12MB file, regardless of your memory settings, to understand my point. header('Content-Description: File Transfer'); header('Content-Type: application/octet-stream'); header('Content-Disposition: attachment; filename="' . To use readfile() it is absolutely necessary to set the mime-type before. How to read user or console input in PHP ? Sed based on 2 words, then replace whole line with variable. Connect and share knowledge within a single location that is structured and easy to search. I also just found out that wordpress uses its own series of tags and. Is Energy "equal" to the curvature of Space-Time? EDIT To learn more, see our tips on writing great answers. Can I tell Apache to do an internal redirect from PHP? The methods well use to see how much memory is used are: Well use these functions at the end of our scripts, so we can see which script uses the most memory at one time. Search for jobs related to Download file using wget from google drive or hire on the world's largest freelancing marketplace with 22m+ jobs. If you need a locked read, use fopen(), flock(), and then fpassthru() directly. Big thanks! But here is the biggest advantage: readfile () will not present any memory issues, even when sending large files, on its own. He usually works on application architecture, though sometimes you'll find him building compilers or robots. 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: $ctype"); header("Content-Disposition: attachment; filename="".basename($filename). downloading files thru php isnt very efficient, using a redirect is the way to go. Are there conservative socialists in the US? I have since tweaked my set of two files some, but the solution is still two files. XSendFilePath /tmp/blah, Then to use it in your script:. This additional header is "Transfer-Encoding: chunked" which essentially overrides the "Content-Length" header and forces a chunked download. You can use the optional second parameter and set it to true, if you want to search for the file in the include_path, too. In the end, I want you to be able to make an educated choice. There is no difference between using readfile, fpassthru, or . PHP enables you to download file easily using built-in readfile() function. Here's a simple trick for browsers (FF, IE) address spaces in filenames for Content-Disposition: eg: The "before and after the file name makes the difference. It is possible that WordPress was hanging the script too long for these headers. We may substitute file_get_contents for something more elegant (like Guzzle), but under the hood its much the same. The filename is sent as a parameter to the readfile() function and it returns the number of bytes read on success, or FALSE and an error on failure. 3 Bc n gin gip gi hoa ti lu nht | Alo Hoa Ti. I've been getting complaints (almost exclusively from iPhone users who are streaming the downloads over 3G) that the files don't fully download, or that they cut off after about 10 or 15 minutes. I think that readfile suffers from the maximum script execution time. "";"); header("Content-Transfer-Encoding: binary"); header("Content-Length: "[emailprotected]($filename)); set_time_limit(0); @readfile("$filename") or die("File not found. Its the latter problem well look at in this tutorial. To have your code portable its a must to have ob_flush and flush called. '"'); header('Expires: 0'); header('Cache-Control: must-revalidate'); header('Pragma: public'); header('Content-Length: ' . Fonts are already embedded in the file. In the examples (99% of the time) you can find header('Content-Disposition: attachment; filename='.basename($file)); but the correct way to set the filename is quoting it (double quote): header('Content-Disposition: attachment; filename="'.basename($file).'"' If you have the gumption, I strongly encourage you to experiment with creating custom protocols and filters. Does balls to the wall mean full speed ahead or full speed ahead and nosedive? bytes delivered like readfile() does. I have seen a lot of download scripts that does not test so you are able to download anything you want on the server. Thanks for contributing an answer to Stack Overflow! By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Coderwall Ruby Python JavaScript Front . Its much easier to define filters than it is to define protocols. i don't trying to say stop learning php or working without it but all i need to say from my experience that every thing develops and php still in the dust so you need to find another thing that . filesize() function takes the filename and returns the size of the file along with its data and assigns it to $data variable. I was trying to use readfile in IE8 and kept getting the message "failed to get data for 'type'". When passed a filename as its only parameter, readfile () will attempt to open it, read it all into memory, then output it without further question. I want to be able to quit Finder but can't edit Finder's Info.plist after disabling SIP, Received a 'behavior reminder' from manager. Would salt mines, lakes or flats be reasonably found in high, snowy elevations? A URL can be used as a filename with this function if the fopen wrappers have been enabled. Glad to see that this worked out for you. return $status; To avoid the risk of choosing themselves which files to download by messing with the request and doing things like inserting "../" into the "filename", simply remember that URLs are not file paths, and there's no reason why the mapping between them has to be so literal as "download.php?file=thingy.mpg" resulting in the download of the file "thingy.mpg". We are using if statement to print suppose the file is not present. In my case, trying to send PDF files thru PHP after access-logging, the beginning "/" must be removed in PHP 7.1. In the second, we dont care what the data is. When the readfile() function is used it reads the content of the file and prints in the output. I couldn't believe what the solution was but here it is anyway! Thanks! Not the answer you're looking for? This function is also used to read a file and it reads the complete file into an array. I have noticed that nobody really knows how. Every Frame is PHP-generated. Multidimensional arrays in PHP How to delete a file using PHP ? Before running the code, make sure that the file to be read file.txt is created in the local file path. If you are lucky enough to not be on shared hosting and have apache, look at installing mod_xsendfile. Vit chng trnh tm tt c cc s chia ht cho 7 nhng khng phi bi s ca, sao lu v ng b d liu nhc t ng dng NCT sang ng dng NhacCuaTui, vui lng cp nht ng dng NCT version 7.1.8 v thc hin theo, Dui y l cc thng tin v kin thc v ch nhp 1 k t trong java hay nht do chnh tay i ng chng ti bin son v, Bi vit nh gi Top 20 ca hng android Thnh ph Rch Gi Kin Giang 2022 theo quan im c nhn ca tc gi Ca hng in thoi Su V, Mn hnh DVD Winca S160 cho xe Toyota Prado cao cp Mn hnh DVD t l mt thit b khng th thiu trn bt k chic xe hi no., Trong phn trc chng ta tm hiu qua v mt s kiu d liu trong Python v cch dng, cng bit mt cht v lnh While trong Python. http://php.net/manual/en/function.readfile.php. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. For anyone having the problem of your html page being outputted in the downloaded file: call the functions ob_clean() and flush() before readfile(). !#)s*(S+)s+(?=S)(.+)/",$line,$match)) continue; $tmp = preg_split("/s/",trim($match[2])); foreach($tmp as $type) $types[strtolower($type)] = $match[1]; } fclose ($fp);

Internet Options > Advanced Tab) this script will output the file to the browser and open it in a different window if the user clicks the open button on the IE prompt. I spent 3h searching why function doesnt work :) tnx! 0 Php: Keep same filename when downloading from server 0 PHP Zip file download issue 0 why is readfile necessary after a flush 0 download docx file from PHP REST API with angularjs Hot Network Questions In other words, unless we know how much a solution helps us (if at all), we cant know if it really is a solution or not. The easiest way to disable this behaviour is with the following .htaccess directive. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Step 1: Comment out header. That seems like a good thing to aim for! monthtomonth rent increase notice roblox bypass audio bot inhome pet euthanasia brooklyn best lobster roll belfast maine concord blue devils bingo schedule . And Firefox as saying the file did not exist. Now, how about we try to stream this instead? '); } else { $response->setHeader('Content-type', 'application/octet-stream', true); $response->setBody($bits); } }?>. That class should extend the SimpleXMLElement class. Use NULL for this parameter if this is an asynchronous operation to avoid potentially erroneous results. Download file with ajax and php - readfile not working You need to separate the functionality, that is, post the data to PHP first, save the content of the text file and then, in a second request, let the user download the file. When using readfile() -- using PHP on Apache -- is the file immediately read into Apache's output buffer and the PHP script execution completed, or does the PHP script execution wait until the client finishes downloading the file (or the server times out, whichever happens first)? A staff member will contact you within 5 working days. Making statements based on opinion; back them up with references or personal experience. Calling the passthrough-script directly (w/o frameset) causes no problems. Lets imagine, for the first scenario, that we want to be able to read a file and create separate queued processing jobs every 10,000 lines. In an asynchronous execution model (like with multi-process or multi-threaded PHP applications), both CPU and memory usage are important considerations. Piping this text isnt useful to us, so lets think of other examples which might be. At first, data acquisition code was developed to: (a) attach to each workstation via Common Internet File System, (b) open the PACS log file that contains study load information, (c) read through the file and capture daily study load data . Theyre a kind of in-between step, providing a tiny bit of control over the stream data without exposing it to us. But even then, as ever, never trust ANYTHING in the request. Why is Singapore considered to be a dictatorial regime and a multi-party democracy at the same time? > I may have discovered the problem. We could also want to transform a stream of data without ever really needing access to the data. The reason this occurs is because some servers are setup by default to enable gzip compression, which sends an additional header for such operations. We are stuck with the distinct possibility of half of our visitors seeing either an annoying third blank window being opened or the script writing over their original window, depending on their Reuse Window for Launching Shortcuts setting. From: spic@php.net Operating system: Windows, any Version PHP version: 4CVS-2002-10-13 PHP Bug Type: Filesystem function related Bug description: readfile, fread, fpassthru won't work with large files!! The readfile() function in PHP is an inbuilt function which is used to read a file and write it to the output buffer. I have a link on my site to a script that outputs an XML file to the browser with the below code: header('Content-Type: application/octet-stream'); header('Content-Disposition: attachment; filename="'.$filename. Try to use this: I am not sure why this worked, but I was able to solve this issue by breaking my php file into two pieces. The filename is sent as a parameter to the readfile () function and it returns the number of bytes read on success, or FALSE and an error on failure. 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