I get some data from a variable, and send it via XHR to PHP file which write it in to a file.
How can I make a line break in the file after every write to it?
var e='Hello world!'
$.getJSON('http://example.com/write.php?callback=&data='+e);
write.php:
$data = $_GET['data'];
if(!$op=fopen('my file name','ab')){
$res='b';
exit;
}
if(fwrite($op,$data)===FALSE){
$res='b';
exit;
}
fclose($op);
Try writing or appending a PHP_EOL to the file after you have written your data.
fwrite($op, PHP_EOL);
Try:
$data = $_GET['data'];
if(!$op=fopen('my file name','ab')){
$res='b';
exit;
}
if(fwrite($op,$data . PHP_EOL)===FALSE){
$res='b';
exit;
}
fclose($op);
AFAIK, fwrite() will automatically append a newline for each write.
Are you running PHP on a Windows server? You might try to open the file to write to in 'at' mode (append, translate line-endings) in stead of 'binary' mode (ab);
$op = fopen('my file name','at');
http://php.net/manual/en/function.fopen.php
Related
I recently installed Apache, PHP and started working on a small project.
I have the following code.
<?php
$tim=time();
$ip=$_SERVER['REMOTE_ADDR'];
$ipadd=$tim."IPaddress".$ip;
$fp="user_log.txt";// file address
$myfilea = fopen($fp,"a");//open file
fwrite($myfilea,$ipadd.PHP_EOL);//add data to file
echo fread($myfilea,filesize($fp));//read file
fclose($myfilea);//close file
?>
Here is what I can do... I can either use "a" mode to add text or I can use "r" mode to read text. I cant do both. I tried using "a+","r+","ar" etc.
Did I miss something during my setup ???
I am running this on windows 8.1.
Thanks for your help.
You need to rewind the file pointer.
$tim = time();
$ip = $_SERVER['REMOTE_ADDR'];
$ipadd = $tim.'IPaddress'.$ip;
// file address
$fp = 'user_log.txt';
//open file
$myfilea = fopen($fp, 'a+');
//add data to file
fwrite($myfilea, $ipadd.PHP_EOL);
// your file pointer is at the end of the file now
// so rewind before you read
rewind($myfilea);
//read file
echo fread($myfilea, filesize($fp));
//close file
fclose($myfilea);
Try this code, use file_put_contents
file_put_contents = Write a string to a file
$fp="user_log.txt";
$tim=time();
$ip=$_SERVER['REMOTE_ADDR'];
$ipadd=$tim."IPaddress".$ip;
$myfile = file_put_contents($fp, $ipadd.PHP_EOL , FILE_APPEND | LOCK_EX);
And for your code try this, it will check able to open file or not
fopen("logs.txt", "a") or die("Unable to open file!");
I wonder, why PHP file_put_contents() function works in a weird way.
I used it in a loop to write some logs to file and all was fine (new lines were appended even if no flag was specified). When I started the script again, it re-created my file.
From PHP doc:
If filename does not exist, the file is created. Otherwise, the
existing file is overwritten, unless the FILE_APPEND flag is set.
OK, so my question is: Why (when used in one loop) it doesn't overwrite my file (without FILE_APPEND flag of course)? Bug or feature? :)
Edit: Example context of use when this happened:
$logFile = dirname ( __FILE__ ) . '/example.log';
foreach($something1 as $sth1) {
$logData .= "Something\n";
foreach($something2 as $sth2) {
if($something_else) {
$logData .= "Line: \t" . $sth2 . "\n";
file_put_contents($logFile, $logData);
}
}
}
As it has been very clearly mentioned in this link under the flags content(which you should have read) it clearly states that if file filename already exists, append the data to the file instead of overwriting it(when this flag is set). So when the flag for FILE_APPEND is set it appends and when not it rewrites. Hope this helped you.
Alternative Way
<?php
$file = 'file.txt';
$append = true;
if (file_exists($file)) {
if ($append) {
// append file
$file = fopen($file, 'a+');
} else {
// overwrite file
$file = fopen($file, 'a');
}
} else {
// create file
$file = fopen($file, 'a');
}
fwrite($file, 'text');
fclose($file);
?>
here is a php fopen documentation
and php file
and read on its related topics
ok, when you are run the script each time try to rename the log file with random number or currentdate timestamp and try to save it in your DB
by this when you again run the script and can take the log file name from DB and update it when you needed
Hi I wan to save the sourecode of http://stats.pingdom.com/w984f0uw0rey to some directory in my website
<?php
if(!copy("http://stats.pingdom.com/w984f0uw0rey", "stats.html"))
{
echo("failed to copy file");
}
;
?>
but this does not work either for me:
<?php
$homepage = file_get_contents('http://stats.pingdom.com/w984f0uw0rey');
echo $homepage;
?>
But I cannot figure how to do it!
thanks
use
<?
file_put_contents('w984f0uw0rey.html', file_get_contents('http://stats.pingdom.com/w984f0uw0rey'));
?>
be sure that the script has write privileges to the current directory
Use file_get_contents().
The best variant you can do in PHP is to use stream_copy_to_stream:
$url = 'http://www.example.com/file.zip';
$file = "/downloads/stats.html";
$src = fopen($url, 'r');
$dest = fopen($file, 'w');
echo stream_copy_to_stream($src, $dest) . " bytes copied.\n";
If you need to add HTTP options like headers, use context options with the fopen call. See as well this similar answer which shows how. It's likely you need to set a user-agent and things so that the other website's server believes you're a browser.
I've been struggling with writing a single string into a file.
I'm using just a simple code under Slackware 13:
$fp = fopen('/my/absolute/path/data.txt', 'w');
fwrite($fp, 'just a testing string...');
fclose($fp);
The file gets created (if it's not already created) but it's empty ?!
The directory in which this file is written is owned by apache's user & group (daemon.daemon) and has 0777 permissions.
This has never happened to me before. I'm curious what's the reason I'm not able to write inside the file ?
Thanks in advance.
Try $ df -h
It probably means your disk is full.
In my opinion you could check the return values:
$fp = fopen('/my/absolute/path/data.txt', 'w');
// $fp -> manual: "Returns a file pointer resource on success, or FALSE on error."
if ($fp) {
$bytes_written = fwrite($fp, 'just a testing string...');
if ($bytes_written) {
echo "$bytes_written bytes written!\n";
} else {
echo "Error while writing!\n"
}
$success = fclose($fp);
if ($success) {
echo "File successfully closed!\n";
} else {
echo "Error on closing!\n";
}
} else {
echo "No filepointer ressource!\n";
}
I suggest using file_put_conents($file_name, $file_cotents);
And to retrieve content: file_get_contents($file_name);
Code looks cleaner too.
http://php.net/manual/en/function.file-put-contents.php and
http://www.php.net/manual/en/function.file-get-contents.php
Could be something is happening to the script/file before the file is closed. Check if there are any other processes that try to access the file (you can use lsof). Also try writing to a new file to see if the same thing occurs.
Also, check the return value on fclose() to make sure the file is being closed successfully.
I have this script on one free PHP-supporting server:
<html>
<body>
<?php
$file = fopen("lidn.txt","a");
fclose($file);
?>
</body>
</html>
It creates the file lidn.txt, but it's empty.
How can I create a file and write something into it,
for example the line "Cats chase mice"?
You can use a higher-level function like:
file_put_contents($filename, $content);
which is identical to calling fopen(), fwrite(), and fclose() successively to write data to a file.
Docs: file_put_contents
Consider fwrite():
<?php
$fp = fopen('lidn.txt', 'w');
fwrite($fp, 'Cats chase mice');
fclose($fp);
?>
$fp = fopen('lidn.txt', 'w');
fwrite($fp, 'Cats chase');
fwrite($fp, 'mice');
fclose($fp);
http://php.net/manual/en/function.fwrite.php
$text = "Cats chase mice";
$filename = "somefile.txt";
$fh = fopen($filename, "a");
fwrite($fh, $text);
fclose($fh);
You use fwrite()
It is easy to write file :
$fp = fopen('lidn.txt', 'w');
fwrite($fp, 'Cats chase mice');
fclose($fp);
Here are the steps:
Open the file
Write to the file
Close the file
$select = "data what we trying to store in a file";
$file = fopen("/var/www/htdocs/folder/test.txt", "w");
fwrite($file, $select->__toString());
fclose($file);
I use the following code to write files on my web directory.
write_file.html
<form action="file.php"method="post">
<textarea name="code">Code goes here</textarea>
<input type="submit"value="submit">
</form>
write_file.php
<?php
// strip slashes before putting the form data into target file
$cd = stripslashes($_POST['code']);
// Show the msg, if the code string is empty
if (empty($cd))
echo "Nothing to write";
// if the code string is not empty then open the target file and put form data in it
else
{
$file = fopen("demo.php", "w");
echo fwrite($file, $cd);
// show a success msg
echo "data successfully entered";
fclose($file);
}
?>
This is a working script. be sure to change the url in the form action and the target file in fopen() function if you want to use it on your site.
In order to write to a file in PHP you need to go through the following steps:
Open the file
Write to the file
Close the file
$select = "data what we trying to store in a file";
$file = fopen("/var/www/htdocs/folder/test.txt", "a");
fwrite($file , $select->__toString());
fclose($file );
fwrite() is a smidgen faster and file_put_contents() is just a wrapper around those three methods anyway, so you would lose the overhead.
Article
file_put_contents(file,data,mode,context):
The file_put_contents writes a string to a file.
This function follows these rules when accessing a file.If FILE_USE_INCLUDE_PATH is set, check the include path for a copy of filename
Create the file if it does not exist then Open the file and Lock the file if LOCK_EX is set and If FILE_APPEND is set, move to the end of the file. Otherwise, clear the file content
Write the data into the file and Close the file and release any locks.
This function returns the number of the character written into the file on success, or FALSE on failure.
fwrite(file,string,length):
The fwrite writes to an open file.The function will stop at the end of the file or when it reaches the specified length,
whichever comes first.This function returns the number of bytes written or FALSE on failure.