From:             
Operating system: Windows XP
PHP version:      5.3.2
Package:          Filesystem function related
Bug Type:         Bug
Bug description:Fwrite writes twice a text

Description:
------------
I'm having troubles with fwrite() function. It is writing twice a text I
just need to write once. I searched in google for the same problem, and I
found the same bug reported here : http://bugs.php.net/bug.php?id=21916,
and here : http://bugs.php.net/bug.php?id=16225, but neither of both was
solved. 



This is how it writes into the file :



"First



Second



Hello world!

Hello world!

Third"



As you can see, the string "hello world!" is writed twice, and that should
not happen. Also, and this is weird, the line fwrite($op, $lastLine);
prints the text correctly, just once...



Test script:
---------------
$file = "test.txt";

$string = "Hello world!\r\n";

$op = fopen($file,"r+");

$exp = explode("\n", fread($op, filesize($file)));

$lastLine = end($exp);

fseek($op, -strlen($lastLine), SEEK_END);

fwrite($op, $string);

fwrite($op, $lastLine);

fclose($op);

Expected result:
----------------
The text should be writed just once.


-- 
Edit bug report at http://bugs.php.net/bug.php?id=51640&edit=1
-- 
Try a snapshot (PHP 5.2):            
http://bugs.php.net/fix.php?id=51640&r=trysnapshot52
Try a snapshot (PHP 5.3):            
http://bugs.php.net/fix.php?id=51640&r=trysnapshot53
Try a snapshot (PHP 6.0):            
http://bugs.php.net/fix.php?id=51640&r=trysnapshot60
Fixed in SVN:                        
http://bugs.php.net/fix.php?id=51640&r=fixed
Fixed in SVN and need be documented: 
http://bugs.php.net/fix.php?id=51640&r=needdocs
Fixed in release:                    
http://bugs.php.net/fix.php?id=51640&r=alreadyfixed
Need backtrace:                      
http://bugs.php.net/fix.php?id=51640&r=needtrace
Need Reproduce Script:               
http://bugs.php.net/fix.php?id=51640&r=needscript
Try newer version:                   
http://bugs.php.net/fix.php?id=51640&r=oldversion
Not developer issue:                 
http://bugs.php.net/fix.php?id=51640&r=support
Expected behavior:                   
http://bugs.php.net/fix.php?id=51640&r=notwrong
Not enough info:                     
http://bugs.php.net/fix.php?id=51640&r=notenoughinfo
Submitted twice:                     
http://bugs.php.net/fix.php?id=51640&r=submittedtwice
register_globals:                    
http://bugs.php.net/fix.php?id=51640&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=51640&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=51640&r=dst
IIS Stability:                       
http://bugs.php.net/fix.php?id=51640&r=isapi
Install GNU Sed:                     
http://bugs.php.net/fix.php?id=51640&r=gnused
Floating point limitations:          
http://bugs.php.net/fix.php?id=51640&r=float
No Zend Extensions:                  
http://bugs.php.net/fix.php?id=51640&r=nozend
MySQL Configuration Error:           
http://bugs.php.net/fix.php?id=51640&r=mysqlcfg

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