How to avoid breaks when content textarea is updated and stored - php

Question

I am using a textarea in which a user can put some content and save the content.
So a file, like example.txt with its content will be saved on the server.
What happens: even if the user does not change the content, and updates it, the content of the textarea will be saved with a couple of breaks before the content.
Below the way I store the content and read it back:
<form class="rafform" method="post">
<input type="hidden" name="editfile" value="<?php echo $dir . '/' . $file; ?>" />
<textarea name="editcontent">
<?php
readfile($dir . '/' . $file); // read content of example.txt ?>
</textarea>
<input type="submit" class="submitmodal edit btn btn-edit " value="Update" />
</form>
After submit, the content will be replaced
if( isset($_POST['editcontent']) ){
$fn = $_POST['editfile'];
$content = stripslashes($_POST['editcontent']);
$fp = fopen($fn,"w") or die ("Error opening file in write mode!");
fputs($fp,$content);
fclose($fp) or die ("Error closing file!");
echo 'Content edited!';
}
If start typing text on the first line, it looks like this:
If I update this text ( so store it) and open it again, it looks like this:
So: why are there a couple of breaks and spaces before the text? (text should be start again in the left upper corner, because I did nothing change)...

Answer 1

Try to use trim(); a PHP function
https://www.w3schools.com/php/func_string_trim.asp
To remove any whitespaces from both sides

Answer 2

Try this :
Don't give some enter between <textarea></textarea>.
And used trim function
str.trim();
<form class="rafform" method="post">
<input type="hidden" name="editfile" value="<?php echo $dir . '/' . $file; ?>" />
<textarea name="editcontent"><?php
readfile($dir . '/' . $file); // read content of example.txt ?></textarea>
<input type="submit" class="submitmodal edit btn btn-edit " value="Update" />
</form>
if( isset($_POST['editcontent']) ){
$fn = trim($_POST['editfile']);
$content = stripslashes($_POST['editcontent']);
$fp = fopen($fn,"w") or die ("Error opening file in write mode!");
fputs($fp,$content);
fclose($fp) or die ("Error closing file!");
echo 'Content edited!';
}