read ,write and replace help

[sasori]

hi i am having problem with writing and replacing strings to a file

 

i have this 'testfile.txt' with the words

 

adsfadsfasdfadsfasdfadfasddfsasori
asdfadsfasdsasori
asasdfasdfsasori adsfadfsasori

 

now here's my php code

$file = 'testfile.txt';
$fh = fopen($file,'r+');
$data = fread($fh,filesize($file));
$string = "sasori";
$replace = "replacement";
$change = str_replace($string,$replace,$data);
fwrite($fh,$change);
fclose($fh);

 

whenever i run this on command prompt php.exe -f replace.php

the data on the text file just appends the replacement..it doesn't replace the original search string

 

adsfadsfasdfadsfasdfadfasddfsasori
asdfadsfasdsasori
asasdfasdfsasori adsfadfsasoriadsfadsfasdfadsfasdfadfasddfreplacement
asdfadsfasdreplacement
asasdfasdfreplacement adsfadfreplacement

 

please tell me what to do in order to replace also those other strings

 

[Alex]

$fh = fopen($file,'w+');

[sasori]

$fh = fopen($file,'w+');

 

I tried what you said 'w+'..now all the words on the test file were gone..and none was written at all

[sasori]

i was able to solve the problem my self ..thanks anyway

 

$file = "testfile.txt";
$fh = fopen("testfile.txt",'r+');
if($fh){
  $data = file_get_contents($file);
  rewind($fh);
  $change = str_replace("replaceme","withthis",$data);
  fwrite($fh,$change);
}