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>"
Related
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.
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.
my simple php code
<?
error_reporting(E_ALL);
set_time_limit(0);
ini_set('show_errors', 1);
$file = "ftpfile.txt";
$handle = fopen($file, "r");
if(!filesize($file)>0) {
echo "File is empty!";
}
else {
while (($ftpservers = fgets($handle, 4096)) !== false) {
echo $ftpservers. "\n\r";
}
if (!feof($handle)) {
echo "Error: unexpected fgets() fail\n";
}
fclose($handle);
}
?>
my textfile
ftp.server:username:password
ftp.server:username:password
ftp.server:username:password
ect..
running this code returns this
ftp.server:username:passwordftp.server:username:passwordftp.server:username:password
ect..
why is fgets returning the textfile in spades of three?
There is a note about problems with line endings on the fgets() documentation page:
If PHP is not properly recognizing the line endings when
reading files either on or created by a Macintosh computer, enabling the
auto_detect_line_endings run-time configuration option
may help resolve the problem.
just an guess but are you sure the source file contains no spaces between ftp.server:username:password and the next entry?
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'm trying to read a specific line from a text file using php.
Here's the text file:
foo
foo2
How would I get the content of the second line using php?
This returns the first line:
<?php
$myFile = "4-24-11.txt";
$fh = fopen($myFile, 'r');
$theData = fgets($fh);
fclose($fh);
echo $theData;
?>
..but I need the second.
Any help would be greatly appreciated
$myFile = "4-24-11.txt";
$lines = file($myFile);//file in to an array
echo $lines[1]; //line 2
file — Reads entire file into an array
omg I'm lacking 7 rep to make comments. This is #Raptor's & #Tomm's comment, since this question still shows up way high in google serps.
He's exactly right. For small files file($file); is perfectly fine. For large files it's total overkill b/c php arrays eat memory like crazy.
I just ran a tiny test with a *.csv with a file size of ~67mb (1,000,000 lines):
$t = -microtime(1);
$file = '../data/1000k.csv';
$lines = file($file);
echo $lines[999999]
."\n".(memory_get_peak_usage(1)/1024/1024)
."\n".($t+microtime(1));
//227.5
//0.22701287269592
//Process finished with exit code 0
And since noone mentioned it yet, I gave the SplFileObject a try, which I actually just recently discovered for myself.
$t = -microtime(1);
$file = '../data/1000k.csv';
$spl = new SplFileObject($file);
$spl->seek(999999);
echo $spl->current()
."\n".(memory_get_peak_usage(1)/1024/1024)
."\n".($t+microtime(1));
//0.5
//0.11500692367554
//Process finished with exit code 0
This was on my Win7 desktop so it's not representative for production environment, but still ... quite the difference.
If you wanted to do it that way...
$line = 0;
while (($buffer = fgets($fh)) !== FALSE) {
if ($line == 1) {
// This is the second line.
break;
}
$line++;
}
Alternatively, open it with file() and subscript the line with [1].
I would use the SplFileObject class...
$file = new SplFileObject("filename");
if (!$file->eof()) {
$file->seek($lineNumber);
$contents = $file->current(); // $contents would hold the data from line x
}
you can use the following to get all the lines in the file
$handle = #fopen('test.txt', "r");
if ($handle) {
while (!feof($handle)) {
$lines[] = fgets($handle, 4096);
}
fclose($handle);
}
print_r($lines);
and $lines[1] for your second line
$myFile = "4-21-11.txt";
$fh = fopen($myFile, 'r');
while(!feof($fh))
{
$data[] = fgets($fh);
//Do whatever you want with the data in here
//This feeds the file into an array line by line
}
fclose($fh);
This question is quite old by now, but for anyone dealing with very large files, here is a solution that does not involve reading every preceding line. This was also the only solution that worked in my case for a file with ~160 million lines.
<?php
function rand_line($fileName) {
do{
$fileSize=filesize($fileName);
$fp = fopen($fileName, 'r');
fseek($fp, rand(0, $fileSize));
$data = fread($fp, 4096); // assumes lines are < 4096 characters
fclose($fp);
$a = explode("\n",$data);
}while(count($a)<2);
return $a[1];
}
echo rand_line("file.txt"); // change file name
?>
It works by opening the file without reading anything, then moving the pointer instantly to a random position, reading up to 4096 characters from that point, then grabbing the first complete line from that data.
If you use PHP on Linux, you may try the following to read text for example between 74th and 159th lines:
$text = shell_exec("sed -n '74,159p' path/to/file.log");
This solution is good if your file is large.
You have to loop the file till end of file.
while(!feof($file))
{
echo fgets($file). "<br />";
}
fclose($file);
Use stream_get_line: stream_get_line — Gets line from stream resource up to a given delimiter
Source: http://php.net/manual/en/function.stream-get-line.php
You could try looping until the line you want, not the EOF, and resetting the variable to the line each time (not adding to it). In your case, the 2nd line is the EOF. (A for loop is probably more appropriate in my code below).
This way the entire file is not in the memory; the drawback is it takes time to go through the file up to the point you want.
<?php
$myFile = "4-24-11.txt";
$fh = fopen($myFile, 'r');
$i = 0;
while ($i < 2)
{
$theData = fgets($fh);
$i++
}
fclose($fh);
echo $theData;
?>
I like daggett answer but there is another solution you can get try if your file is not big enough.
$file = __FILE__; // Let's take the current file just as an example.
$start_line = __LINE__ -1; // The same with the line what we look for. Take the line number where $line variable is declared as the start.
$lines_to_display = 5; // The number of lines to display. Displays only the $start_line if set to 1. If $lines_to_display argument is omitted displays all lines starting from the $start_line.
echo implode('', array_slice(file($file), $start_line, lines_to_display));
I searched for a one line solution to read specific line from a file.
Here my solution:
echo file('dayInt.txt')[1]