An error that should not be there

Question

This is my first question, so excuse me if I do something wrong! I try my best!

So I got this simple code

    <?php 
$fn = "file.txt"; 
$file = fopen($fn, "w+"); 
$size = filesize($fn); 

if($_POST['addition']) fwrite($file, $_POST['addition']); 

$text = fread($file, $size); 
fclose($file); 
?> 
<form action="<?=$PHP_SELF?>" method="post"> 
<input type="text" name="addition" value="<?php echo file_get_contents('file.txt');?>"/> 
<input type="submit"/> 
</form>

<iframe width="420" height="315" src="//<?php echo file_get_contents('file.txt');?>" frameborder="0" allowfullscreen></iframe>

It works great, only one small problem ...

Problem

The script works fine, but the problem is that it throws an error:

Warning: fread () expects exactly 2 parameters, 1 is specified in / home / u 799303375 / public_html / beta / private / Test / test.php on line 8

I do not know how to fix this.

What have i tried

• I tried to remove the size of $, did not work, it expects 2 lines to get only 1.
• Nothing yet ...

Help me if you need a working example, just ask not to include it right now!

Answer 1

PHP, fopen ($ fn, "w +" ) . , fread 0 () .

, . , fopen, "a +". , . , .

( , ); fread file_get_contents(). , , :

$text = file_get_contents ($ fn);

, , .

Answer 2

fread() int

string fread ( resource $handle , int $length )

$size? . .