Ok, so I have a huge text file (around 2 gigabytes) and it has about 2 billion lines.
All I've tried so far is
$myfile = fopen("C:\Users\server\Desktop\primes.txt", "r") or die("Unable to
open file!");
while(!feof($myfile)) {
echo fgets($myfile) . "<br>";
}
fclose($myfile);
but has a problem with not finishing all of the lines and hangs up somewhere in the first quarter - and it also takes a long time to load.
Second thing I've tried was this
$path="C:/Users/server/Desktop/Server files/application.windows64/";
$file="primes.txt";
//read file contents
$content="
<code>
<pre>".file_get_contents("$path/$file")."</pre>
</code>";
//display
echo $content;
But it wasn't even loading lines.
Also, I can't directly open this file and it has to be on my Desktop. Please don't suggest me to copy or move it into another directory.
Could I get any suggestions to help me get along or at least an explanation why it's not working?
Sorry, my English isn't as good as it should be.
$attachment_location = $_SERVER["DOCUMENT_ROOT"] . $file;
if (file_exists($attachment_location)) {
header($_SERVER["SERVER_PROTOCOL"] . " 200 OK");
header("Cache-Control: public");
header("Content-Type: text/plain");
header("Content-Length:" . filesize($attachment_location));
header("Content-Disposition: attachment; filename=file.txt");
readfile($attachment_location);
die();
} else {
die("Error: File not found.");
}
It's not working because it's a 2 gig file and you're trying to output it to the screen as opposed to allowing the user to download it or open it on their personal machine. That should be the only way this file is delivered. 2 gigs output to a browser window would probably crash either or both of the client and server.
http://php.net/manual/en/function.readfile.php
If you really want to actually display the file, it would technically be possible to display a certain % of the file with a pager that when clicked will switch between different portions of the file.
http://php.net/manual/en/function.fseek.php
Related
I'm trying to pass a variable ( n ) from a JS script to PHP thru the URL and get it to write said variable to a file. Unfortunately I can see the PHP script being called over the network, with the appropriate URL and with 200 status, but it doesn't seem to be executing. The file it should be writing to never changes. The disk is not full, the file is not in use by another process and the file it is writing to has completely open permissions as a testing measure. Hopefully this is a simple fix, thanks in advance.
<?php
$my_file='count.txt';
$count= $_GET['n'];
$handle = fopen($my_file, 'w');
fwrite($handle, $count);
fclose($handle);
?>
Examples of requests being sent
Your code is working fine and its writing whatever value for n is passed. however it keeps on overwriting previous value for every new request.
$handle = fopen($my_file, 'w');
In 'w' mode it create new file for read and write while placing pointer at the beginning.
Use 'w+' mode this places the pointer at the end of file.
$handle = fopen($my_file, 'w+');
For more details on files you can check below url for different modes and other functions
http://php.net/manual/en/function.fopen.php
i have a pdf file that if downloaded through the viewer it downloads at the correct file size but when i use this code for say download selected the file size of the pdf changes and renders it useless when you open with adobe/nitro/etc.
<?php
#apache_setenv('no-gzip', 1);
#ini_set('zlib.output_compression', 'Off');
if (isset($_GET['url'])) {
$fullPath = $_GET['url'];
if($fullPath) {
#$fsize = filesize($fullPath);
$path_parts = pathinfo($fullPath);
$ext = strtolower($path_parts["extension"]);
switch ($ext) {
case "pdf":
header("Content-Disposition: attachment;
filename=\"".$path_parts["basename"]."\""); // use 'attachment' to force a download
header("Content-type: application/pdf"); // add here more headers for diff. extensions
break;
default;
header("Location: ".$fullPath);
exit;
}
if($fsize) {//checking if file size exist
header("Content-length: $fsize");
}
fopen($fsize, "r");
exit;
}
}
?>
i noticed the file size is 24kb on the server. i go to url and view it then click the download from pdf viewer the file downloads just fine and verified the filesize in my download folder at 24kb. however when i use this code above as my download.php it downloads but comes back as 2kb.
can someone help me figure out why its changing the file size please?
I don't see any code where you are actually sending the file.Make sure you actually send the file. You have used fopen() but you are not using fread() that's why files is getting opened but not getting being read may be that's why it's showing some default output which amounts to 2kb . You can use the much simpler readfile() instead
For that replace this line
fopen($fsize, "r");
with this one
readfile('path/to/' . $path_parts["basename"]);
Just in case you are handling huge files like several MBs then fopen will suite you better as it would be more memory efficient.Also note the b flag in fopen() parameter it refers to binary mode so whenever you are sending a binary file like pdf,images etc you should always use this flag
set_time_limit(0);
$file = #fopen('path/to/' . $path_parts["basename"],"rb");
while(!feof('path/to/' . $path_parts["basename"]))
{
print(#fread('path/to/' . $path_parts["basename"], 1024*2));
ob_flush();
flush();
}
the problem was the / in the url it was starting with. once i added a trim to the url it worked. tbh now that i started looking into this i dont think it really ever work just appeared it did.
$trmfullPath = $_GET['url'];
$fullPath = trim($trmfullPath, "/");
this seemed to fix it. also dont get any errors in my php error log now.
I'm making a PHP script for a JavaScipt site I've made.
The goal is to save the contents of a string as an HTML file when I click a button.
I'm using jQuery to make a Post request.
I'm using an Ubuntu OS with an Apache 2 server. The folder I'm writing to has permissions 777 (for testing only, will repeal this).
A requirement is the PHP must live in another file.
The issue is whenever I make the request, the file saves blank.
A requirement is each filename must be a timestamp. The file has the correct file name, but not contents.
So far, here is my code:
<?php
$fileName = $_GET['fileNameData'];
$htmlImport = $_GET['htmlToSaveData'];
$htmlToSave = (string)$htmlImport;
$myFile = fopen($fileName, "w") or die('You do not have write permissions');
//fwrite($myFile, $htmlToSave);
file_put_contents($myFile, $htmlToSave);
fclose($myFile);
?>
I've tried the frwite function that I've commented out, same effect.
I have tested this in terminal by passing in arguments ($argv[1] and $argv[2]). That works fine.
The JS I've made to run my site looks like:
var newURL = 'saveHTML.php/?fileNameData=' + fileName + '&htmlToSaveData=' + htmlToSave
$.post(newURL)
.done(function(){
alert('Your file saved as ...' + htmlToSave)
})
I've also tried this code, with the same result:
$.post('saveHTML.php/', {
fileNameData : fileName,
htmlToSaveData : htmlToSave
})
Both the fileName and htmlToSave are strings, although htmlToSave is rather long and is actually html text that I've converted to a string.
Does anyone have ideas about what's going on here? I'm not a PHP developer at all.
I'm using a callback so I can be sure I've collected all my html before I pass the string to PHP.
I've read and tested the recommendations on this question here and this has been fruitless.
EDIT Don't be alarmed about the code, I realise it's a security issue but this is a learning project and this will not be in production.
I can see right off the bat that you have
$myFile = fopen($fileName, "w") or die('You do not have write permissions');
//fwrite($myFile, $htmlToSave);
file_put_contents($myFile, $htmlToSave);
fclose($myFile);
file_put_contents takes a file name, not a handle. So you would only need
file_put_contents($fileName, $htmlToSave);
Edit: I also feel like I should point out that you should not allow your users to name your files. They could potentially do some nasty stuff to your machine.
I wrote a jquery script to play short videoclips with random audio fragments + subtitles attached. See here for a 'working' example. Most of the code is triggered when the video ends, and that part works well. However I have an occasional problem with the on document.ready function. It works about 7 out of 8 times, but sometimes a 404 is given for the .vtt subtitle file and the first video plays without subtitle (I checked the link and the .vtt file is actually created). (you can recreate the bug by refreshing the page a few times) I was wondering if someone has a suggestion on how to fix or debug this... Thank you!
$(document).ready(function() {
createsubtitle(); //creates random subtitle string
timestamp0 = $.now();// two timestamps to make unique files (to be deleted afterwards)
timestamp1 = $.now();
window.timestamp0 = timestamp0
window.timestamp1 = timestamp1
$.ajax({type: "POST",url:"save1.php",data: {text:subtitle, time:timestamp1},success: function() {console.log("message sent!")}}); // first .vtt file is made using php (see code below)
createsubtitle(); // new random subtitle
$.ajax({type: "POST",url:"save0.php",data: {text:subtitle, time:timestamp0},success: function() {console.log("message sent!")}}); // second php (the script alternates between two .vtt files)
$("#subtitles").attr("src", "subtitle/sub1" + timestamp1 + ".vtt"); // one .vtt file is added as src to track element #subtitles
$('#rearrangements').get(0).play(); // video is played
});
php code:
#!/usr/bin/php
<?php
$subtitle = $_POST['text'];
$timestamp = $_POST['time'];
$filename = 'subtitle/sub1'.$timestamp.'.vtt';
$myfile = fopen($filename, "w") or die("Unable to open file!");
$txt = $subtitle;
fwrite($myfile, $txt);
fclose($myfile);
?>
I'm working on codebeautify.org site,
in which I want to convert excel to HTML file. I've converted that but I can't download the file.
public function convertHTML(){
$fileName=$this->input->post('fileName');
$file_ext = end(explode('.',$fileName));
if($file_ext!="xlsx"){
$data = new Spreadsheet_Excel_Reader(LOCAL_UPLOAD_PATH.$fileName);
for($s=0; $s<count($data->sheets); $s++) {
echo "<b><u>Sheet Name</u> :- ".$data->boundsheets[$s]['name']."</b><hr>";
echo $data->dump(false,false,$s);
echo "<hr>";
}
$fh = fopen(LOCAL_UPLOAD_PATH.$fileName, 'a');
fclose($fh);
unlink(LOCAL_UPLOAD_PATH.$fileName);
}
else{
$this->convertXLSXtoHTML($fileName);
}
}
Now I want to download it. How can I do it?
If you want to download instead of Show in the browser there are some options, but to be honest, I prefer show the file, because the options are not a very good user experience, and the last one not always is possible:
Option 1: Insert the excel in a .zip
Option 2: The browser (some of them) has an option which ask to the users if they want to show or download the file, the problem with this is that option is not working only in your page.
Option 3: add in the .htacces the next code to force the browser to download some type of files:
<FilesMatch "\.(?i:xlxs)$">
ForceType application/octet-stream
Header set Content-Disposition attachment
</FilesMatch>