I have a function to write to a .txt file. my problem is that it writes only on the first line, so erases the old line for the new line. I want to append the new lines to the file.
function logit($log,$filename = ''){
$logfile = "log/".date('Ymd').$filename.".txt";
if ($fh = fopen($logfile, 'w')) {
fwrite($fh, date('H:i:s')." | ".$log."\n");
fclose($fh);
return 1;
} else
return false;
}
You need to search before post your question.. there's many documentation and answers for that problem.. anyway, replace this fopen($logfile, 'w') with fopen($logfile, 'a')
Related
As you can see in the code below, I'm trying to use flock to prevent other clients to acess the php (actually multiple users will acess this something like 10 times per second, each one), as I've found searching here... But this is not working. My data.txt is getting blank everytime doing this.
<?php
$fileName = $_GET["room"]."/data.txt";
function replaceLine($data){
if (stristr($data, $_GET["player"])){
return $_GET["player"]." ".$_GET["data"]."\n";
}
return $data;
}
$file = fopen($fileName,"r");
if (flock($file, LOCK_EX)){
//ftruncate($file, 0);
///--------------
$data = file($fileName);
$data = array_map("replaceLine", $data);
file_put_contents($fileName, implode('', $data));
echo fread($file, filesize($fileName)+1);
///--------------
fflush($file);
flock($file, LOCK_UN);
} else {
echo "wait";
}
fclose($file);
?>
This is the original code (that I was trying to modify to prevent making the file empty): (It works as I want, but have this file problem...)
<?php
$fileName = $_GET["room"]."/data.txt";
function replaceLine($data){
if (stristr($data, $_GET["player"])){
return $_GET["player"]." ".$_GET["data"]."\n";
}
return $data;
}
$data = file($fileName);
$data = array_map("replaceLine", $data);
file_put_contents($fileName, implode('', $data));
$file = fopen($fileName,"r");
echo fread($file, filesize($fileName)+1);
fclose($file);
?>
Sorry for asking this newbie question, but I have not idea how to fix this and I'm searching and trying different things for weeks! Thanks!
You are opening the file for read only and then you are attempting to write to that same file. Try setting the fopen parameter to read/write.
$file = fopen($fileName,"r+");
I would also use fwrite() instead of file_put_contents() since you already have the file pointer and opening it again will likely be denied by the lock.
I need your help.
I need to every time the code stores the information in txt file, then each new record to the new line and what should be done to all be numbered?
<?php
$txt = "data.txt";
if (isset($_POST['Password'])) { // check if both fields are set
$fh = fopen($txt, 'a');
$txt=$_POST['Password'];
fwrite($fh,$txt); // Write information to the file
fclose($fh); // Close the file
}
?>
Added some comments to explain the changes.
<?php
$file = "data.txt"; // check if both fields are set
$fh = fopen($file, 'a+'); //open the file for reading, writing and put the pointer at the end of file.
$word=md5(rand(1,10)); //random word generator for testing
fwrite($fh,$word."\n"); // Write information to the file add a new line to the end of the word.
rewind($fh); //return the pointer to the start of the text file.
$lines = explode("\n",trim(fread($fh, filesize($file)))); // create an array of lines.
foreach($lines as $key=>$line){ // iterate over each line.
echo $key." : ".$line."<br>";
}
fclose($fh); // Close the file
?>
PHP
fopen
fread
explode
You can do like this in a more simpler way..
<?php
$txt = "data.txt";
if (isset($_POST['Password']) && file_exists($txt))
{
file_put_contents($txt,$_POST['Password'],FILE_APPEND);
}
?>
we open file to write into it ,you must make handle to a+ like php doc
So your code will be :
<?php
$fileName = "data.txt"; // change variable name to file name
if (isset($_POST['Password'])) { // check if both fields are set
$file = fopen($fileName, 'a+'); // set handler to a+
$txt=$_POST['Password'];
fwrite($file,$txt); // Write information to the file
fclose($file); // Close the file
}
?>
for writing i using below code this is very nice and simple work great now i have problem with this we already know that in window 260 character allow for file name problem start from here in code there is option if file not write stop and terminate process (or die("can't open file");) now i want simple if some reason file not write show echo not write and process continue.I try it myslef but it gives me error
my write function
function write($post, $myFile){
$fh = fopen($myFile, 'a+') or die("can't open file");
fwrite($fh, $post);
fclose($fh);
}
If there's a limit on the length of something then you could always check the length of the thing beforehand, and if you don't want your code to exit, then don't use die().
function write($post,$myFile){
if( strlen($myfile) > 260 ) {
echo "Filename too long";
return false;
} else {
if( ! $fh = fopen($myFile, 'a+') ) {
echo "can't open file";
return false;
}
fwrite($fh, $post);
fclose($fh);
return true;
}
}
Try this,
function write($post,$myFile)
{
$fh = #fopen($myFile, 'a+');
if($fh)
{
fwrite($fh, $post);
fclose($fh);
}
else
{
echo "can't open file";
}
}
I have an issue with writing and reading to text file.
I have to first write from a text file to another text file some values which I need to read again. Below are the code snippets:
Write to text file:
$fp = #fopen ("text1.txt", "r");
$fh = #fopen("text2.txt", 'a+');
if ($fp) {
//for each line in file
while(!feof($fp)) {
//push lines into array
$thisline = fgets($fp);
$thisline1 = trim($thisline);
$stringData = $thisline1. "\r\n";
fwrite($fh, $stringData);
fwrite($fh, "test");
}
}
fclose($fp);
fclose($fh);
Read from the written textfile
$page = join("",file("text2.txt"));
$kw = explode("\n", $page);
for($i=0;$i<count($kw);$i++){
echo rtrim($kw[$i]);
}
But, if I am not mistaken due to the "/r/n" I used to insert the newline, when I am reading back, there are issues and I need to pass the read values from only the even lines to a function to perform other operations.
How do I resolve this issue? Basically, I need to write certain values to a textfile and then read only the values from the even lines.
I'm not sure whether you have issues with the even line numbers or with reading the file back in.
Here is the solution for the even line numbers.
$page = join("",file("text2.txt"));
$kw = explode("\n", $page);
for($i=0;$i<count($kw);$i++){
$myValue = rtrim($kw[$i]);
if(i % 2 == 0)
{
echo $myValue;
}
}
I'm trying to define an array with a list of file urls, and then have each file parsed and if a predefined string is found, for that string to be replaced. For some reason what I have isn't working, I'm not sure what's incorrect:
<?php
$htF = array('/home/folder/file.extension', '/home/folder/file.extension', '/home/folder/file.extension', '/home/folder/file.extension', '/home/folder/file.extension');
function update() {
global $htF;
$handle = fopen($htF, "r");
if ($handle) {
$previous_line = $content = '';
while (!feof($handle)) {
$current_line = fgets($handle);
if(stripos($previous_line,'PREDEFINED SENTENCE') !== FALSE)
{
$output = shell_exec('URL.COM');
if(preg_match('#([0-9]{1,3}\.){3}[0-9]{1,3}#',$output,$matches))
{
$content .= 'PREDEFINED SENTENCE '.$matches[0]."\n";
}
}else{
$content .= $current_line;
}
$previous_line = $current_line;
}
fclose($handle);
$tempFile = tempnam('/tmp','allow_');
$fp = fopen($tempFile, 'w');
fwrite($fp, $content);
fclose($fp);
rename($tempFile,$htF);
chown($htF,'admin');
chmod($htF,'0644');
}
}
array_walk($htF, 'update');
?>
Any help would be massively appreciated!
Do you have permissions to open the file?
Do you have permissions to write to /tmp ?
Do you have permissions to write to the destination file or folder?
Do you have permissions to chown?
Have you checked your regex? Try something like http://regexpal.com/ to see if it's valid.
Try adding error messages or throw Exceptions for all of the fail conditions for these.
there's this line:
if(stripos($previous_line,'PREDEFINED SENTENCE') !== FALSE)
and I think you just want a != in there. Yes?
You're using $htF within the update function as global, which means you're trying to fopen() an array.
$fh = fopen($htF, 'r');
is going to get parsed as
$fh = fopen('Array', 'r');
and return false, unless you happen to have a file named 'Array'.
You've also not specified any parameters for your function, so array_walk cannot pass in the array element it's dealing with at the time.