php - How to switch Post Method to file_get_contents and file_put_contents? -

i got text file (testfile.txt) containing

127.0.0.1:80 127.0.0.1:90 127.0.0.1:100 127.0.0.1:230 127.0.0.1:110 127.0.0.1:200 127.0.0.1:201 127.0.0.1:45 127.0.0.1:86 (...) 

in order fix lines such 127.0.0.1:100 127.0.0.1:230 , 127.0.0.1:201127.0.0.1:45 i'm using script (post method):

$listvalue = "";      if($_server['request_method'] == 'post')     {         if(!empty($_post['list']))         $res = preg_match_all("/\d+\.\d+\.\d+\.\d+\:\d+/", $_post['list'], $match);          if($res)         foreach($match[0] $value)         $listvalue .= $value."\n"; 

and on submit:

echo trim($listvalue); 

script returns:

127.0.0.1:80 127.0.0.1:90 127.0.0.1:100 127.0.0.1:230 127.0.0.1:110 127.0.0.1:200 127.0.0.1:201 127.0.0.1:86 (...) 

i need script read testfile.txt , save testfile.txt. ideas? cheers

this should want:

$list = file_get_contents('testfile.txt'); $res = preg_match_all("/\d+\.\d+\.\d+\.\d+\:\d+/", $list, $match);  if($res) {     foreach($match[0] $value)         $listvalue .= $value."\n";     file_put_contents('testfile.txt', trim($listvalue)); } 

edit: also, instead of regexp, simple str_replace(' ', "\n", $list)