Edit Text Using PHP problem

[Sifat3d]

I have a txtedit.php file. The source is below:

<?php

$urlinf = "testfile.txt";

$fh=$urlinf;
$newtxt= $_POST['content'];
if(isset($_POST['content']) AND ($_POST['content'])!=" ")
{
$content = stripslashes($newtxt);
$fp= fopen($fh,"w") or die ("Error opening the file in write mode");
fwrite($fp,$content);
fclose($fp) or die ("Error closing file!");
}

?>
<h3><?php echo "Editing: ".$urlinf	?></h3>;
<form name="txtedit" action="" method="post">

<textarea style="font-size:12px" rows="25" cols="80" name="content">
<?php @readfile ($fh) or die ("<h1>File does not exist</h1>");?></textarea>
</br>
<input type="submit" onclick="return confirm('Are you sure ?');" value="Save File"/> </form>

Now This works fine but the problem is, whenever i edit the textfile, the lines increase. I cant explain this in words, so for example:

The edited file text:

START
HI
SOMETEXT
END

When i save the file it becomes:

START

HI

SOMETEXT

END

And if i save again it becomes:

START


HI


SOMETEXT


END

And so on...
After three or four edits, the line spaces become so much that the file becomes very hard to read or use.
Is there any way around this problem?
I have tried fwrite($fp,$content); and fputs($fp,$content); , but the problem still exists.
Where is the problem? How do i solve it?
Please help me
Thanks in advance.

[mFreak]

i had a similar problem just at my script it was being tabs added not new lines and the way i solved it is that i replaced them with nothing using str_replace. you could try removing new lines, or use file_put_content function i never had problems with it.

[Sifat3d]

What do i replace? I didnt understand ur answer. Please anyone give me a solution.

[i0nutzxp]

 
<?php
$file = "testfile.txt";
$canRead =  is_file($file) ? true : false;

if($canRead && isset($_POST['content']) && $_POST['content'] != NULL)
{
    $content = stripslashes($_POST['content']); 
    if (file_put_contents($file, $content))
        echo '<h3 style="background-color:pink;" align="center">File edited successfully!</h3>';
    else
        echo '<h3 style="background-color:pink;" align="center">Error while editing the file!</h3>';
}
?>
<h3><?php echo "Editing: ".$file; ?></h3>
<form name="txtedit" action="" method="post">
    <textarea style="font-size:12px" rows="25" cols="80" name="content"><?php echo $canRead ? file_get_contents($file) : "File $file not found.";?></textarea>
      <br/>
    <input type="submit" onclick="return confirm('Are you sure?');" value="Save File"/> 
</form>