So, call me crazy (I know you will) but this is only for learning purposes. I'm doing some exploring with php and using PEAR Crypt_Blowfish on a line-by-line read of an mp3 file. It's very server intensive and I'm seeing strange output. I was wondering if anyone had insight as to why:
<?php
include_once '/home/.../php/Crypt/Blowfish.php';
$bf = new Crypt_Blowfish('super');
$handle = #fopen("Judith_full.mp3", "r");
if ($handle) {
while (($buffer = fgets($handle, 1024)) !== false) {
echo $buffer;
echo '<br><br>ENCRYPTED: <br>';
echo $bf->encrypt($buffer).'<br><br>';
}
if (!feof($handle)) {
echo "Error: unexpected fgets() fail\n";
}
fclose($handle);
}
It's simply showing me the line, then the line encrypted... but part way through the page load I see text that is underlined:
....juMbLEDteXt_thenStartsUnderlinedJuMbLEDteXt_... // can not paste, cause it's encrypted garbage.
The page never full loads, just hangs. Also after the underlining it starts to ignore the <br>'s that are in there.
Thanks to anyone that takes the time.
Related
I have a 197gb text file that I want to read and push the contents into MySql database. I know, I can't put that big file in PHP buffer and read it as whole, So I want to read few hundred lines as a time and keep on reading next and next to read the whole file.
I am trying it with this but the page returns nothing
<?php
$i = 0;
$handle = fopen("./data/200gbfile.txt", "r") or die("Couldn't get handle");
if ($handle) {
while (($line = fgets($handle)) !== false) {
echo $line . "<br />";
if ($i > 100) {
exit;
}
$i++;
}
fclose($handle);
} else {
echo "Error Opeing File!";
}
?>
Is there a limit of the max file size to be handled in php setting?
EDIT: for the 197gb file in question, fopen is failing to return anything and
the output page is just going blank.
You can read the file in chunks to save memory:
For example:
$fd = #fopen("./data/200gbfile.txt", "r");
while (!feof($fd)) {
$data = fread($fd, 1024); // read the file in 1024kb chunks
// handle current data (read line by line for example)
}
fclose($fd);
But no idea if that works with a file with 100Gbytes+.
Edit: # with fopen is required as suggested by Roman.
you can use ini_set('memory_limit','16M'); to set size accordingly but i don't wether it will handle such huge file. never tested that..
I'm trying to display the content of a text file on my website using PHP's fgets, but when I echo the lines in combination with something else (<br>, \n, ...) I get pretty weird characters.
Here's my code :
<?php
header('Content-Type: text/plain;charset=utf-8');
$handle = #fopen("test.txt", "r");
if ($handle) {
while (($buffer = fgets($handle, 4096)) !== false) {
echo $buffer."<br>";
}
if (!feof($handle)) {
echo "Error: unexpected fgets() fail\n";
}
fclose($handle);
}
?>
Here is the content of test.txt :
1
2
3
4
5
... (6 - 18)
19
20
And here's what I get :
Result with <br>
If I use \n instead of <br>, I don't even get Chinese characters :
Result with \n
I think the issue comes from fgets(), because when I print only one line (without the loop) I get the same issue, but if replace $buffer by "1" (echo "1"."<br>";) I get the expected result.
EDIT
As suggested I modified the code to add header('Content-Type: text/plain;charset=utf-8'); at the beginning of the php file, and modified the output as well.
I found that the issue must be somewhere in the text file : I created a new one and the issue was gone.
I don't know the original encryption of the file because a friend gave it to me.
I'll update this answer if I find out exactly what was going on.
EDIT
I made a copy via TextEdit and when saving it the default encoding format was UTF-16, I guess that was the problem.
Working DEMO: http://phpfiddle.org/main/code/xrsk-a0uv
Text File:: http://m.uploadedit.com/ba3s/1500405331493.txt
Problem: at the Time of create text file it's select the encoding format is UTF-16. !! UTF-8 by default for nodepad,nodepad++,sublime etc.. !!
<?php
header('Content-Type: text/plain;charset=utf-8');
$handle = #fopen("http://m.uploadedit.com/ba3s/1500405331493.txt", "r");
if ($handle) {
while (($buffer = fgets($handle, 4096)) !== false) {
echo $buffer."</br>";
}
if (!feof($handle)) {
echo "Error: unexpected fgets() fail\n";
}
fclose($handle);
}
?>
NOTE: Add header for charset-utf-8
header('Content-Type: text/plain;charset=utf-8');
OUTPUT Using With "\n"
OUTPUT Using With "</br>"
I have a small page to check if a network share is up. To do so, the user can had a share in a txt file (easier than touching the code itself) and then the page will read the text file and check if its online or not.
But the probleme is, it doesn't work has expected. looks like it work only when I have 1 line in the text file
<?php
$handle = fopen("share.txt", "r");
if ($handle) {
while (($line = fgets($handle)) !== false) {
echo $line;
if (is_dir($line)) {echo $line ."is up";}
else {echo $line ."is down";}
}
fclose($handle);
} else {
echo "No text file has been found";}
?>
and my share.txt contain
\\server1\folder
\\server2\folder
\\server3\folder
In that case, the page return only the last share as up and not all 3.
Any idea?
Thank you
It looks as if the line endings are not correctly recognised by PHP. In this case it should help to activate the
ini_set("auto_detect_line_endings", true);
so that PHP will also deal correctly with the "\r" line ending for example.
See this comment for more information.
As I start the process of writing my site in PHP and MySQL, one of the first PHP scripts I've written is a script to initialize my database. Drop/create the database. Drop/create each of the tables. Then load the tables from literals in the script.
That's all working fine! Whoohoo :-)
But I would prefer to read the data from files rather than hard-code them in the PHP script.
I have a couple of books on PHP, but they're all oriented toward web development using MySQL. I can't find anything about reading and writing to ordinary files.
Yes, I know there's a gazillion questions here on stackoverflow about reading TXT files, but when I look at each one, they're for C or C# or VB or Perl. I'm beginning to think that PHP just can't read files :-(
All I need is a brief PHP example of how to open a TXT file on the server, read it sequentially, display the data on the screen, and close the file, as in this pseudo-code:
program readfile;
handle = open('myfile.txt');
data = read (handle);
while (not eof (handle)) begin
display data;
data = read (handle);
end;
close (handle);
end;
I will also need to write files on the server when I get to the part of my site where people upload avatars, and save them as JPG or GIF files. But that's for later.
Thanks!
From the PHP manual for fread():
<?php
// get contents of a file into a string
$filename = "/usr/local/something.txt";
$handle = fopen($filename, "r");
$contents = fread($handle, filesize($filename));
fclose($handle);
?>
EDIT
per the comment, you can read a file line by line with fgets()
<?php
$handle = #fopen("/tmp/inputfile.txt", "r");
if ($handle) {
while (($buffer = fgets($handle, 4096)) !== false) {
echo $buffer;
}
if (!feof($handle)) {
echo "Error: unexpected fgets() fail\n";
}
fclose($handle);
}
?>
All I need is a brief PHP example of how to open a TXT file on the server, read it sequentially, display the data on the screen, and close the file, as in this pseudo-code:
echo file_get_contents('/path/to/file.txt');
Yes that brief, see file_get_contents, you normally don't need a loop:
$file = new SPLFileObject('/path/to/file.txt');
foreach($file as $line) {
echo $line;
}
Well, since you're asking about resources on the subject, there's a whole book on it in the PHP.net docs.
A basic example:
<?php
// get contents of a file into a string
$filename = "/usr/local/something.txt";
$handle = fopen($filename, "r");
$contents = fread($handle, filesize($filename));
fclose($handle);
?>
Why you not read php documentation about fopen
$file = fopen("source/file.txt","r");
if(!file)
{
echo("ERROR:cant open file");
}
else
{
$buff = fread ($file,filesize("source/file.txt"));
print $buff;
}
file_get_contents does all that for you and returns the text file in a string :)
You want to read line by line? Use fgets.
$handle = #fopen("myfile.txt", "r");
if ($handle) {
while (($content = fgets($handle, 4096)) !== false) {
//echo $content;
}
if (!feof($handle)) {
echo "Error: unexpected fgets() fail\n";
}
fclose($handle);
}
I am attempting to download fairly large files (up to, possibly over 1GB) from a remote HTTP server through a PHP script. I am using fgets() to read the remote file line by line and write the file contents into a local file that is created through tempnam(). However, the downloads of very large files (several hundred MB) are failing. Is there any way I can rework the script to catch the errors that are occurring?
Because the download is only part of a larger overall process, I would like to be able to handle the downloads and deal with errors in the PHP script rather than having to go to wget or some other process.
This is the script I am using now:
$tempfile = fopen($inFilename, 'w');
$handle = #fopen("https://" . $server . ".domain.com/file/path.pl?keyID=" . $keyID . "&format=" . $format . "&zipped=true", "r");
$firstline = '';
if ($handle) {
while (!feof($handle)) {
$buffer = fgets($handle, 4096);
if ($firstline == '') $firstline = $buffer;
fwrite($tempfile, $buffer);
}
fclose($handle);
fclose($tempfile);
return $firstline;
} else {
throw new Exception ('Unable to open remote file.');
}
I'd say you're looking for stream_notification_callback (especially the STREAM_NOTIFY_FAILURE & STREAM_NOTIFY_COMPLETED constants)