Replace path string in a config file using PHP

Question

this is a continuation of the previous post. I need to change some parameters(strings) in my config file (.cfg)

I have followed Moen's style of coding and was successful in replacing the string which I wanted to replace.

Moen's code:

$url = 'htp://localhost/mydocs/doc.pdf';

$file='config.cfg';
$file_data = explode("\r\n",file_get_contents($file));

foreach($file_data as $line) {
  list($key, $value) = explode('=', $line);
  if($key == "resource") {
    $res_data[] = "$key=$url\n";
    continue;
  }
  $res_data[] = $line;

}

file_put_contents("config.cfg", join("\r\n",$res_data));

But on the other hand I need to replace not one string but multiple strings like resource, name, file etc etc. I tried to use a switch statement and look for all the strings I want to replace. I can replace them all but the problem is I am creating a copy of the changed strings with the original parameters in tact.

foreach($file_data as $line) { list($key, $value) = explode('=', $line);

switch($key){
     case "resource":
        $res_data[] = "$key=$url"; 
        break;
     case "name":
        $res_data[] = "$key=$name";             
        break;
     case "file":
        $res_data[] = "$key=$file"; 
        break;
    }
  $res_data[] = $line;

}

file_put_contents("config.cfg", join("\r\n",$res_data));

For example if the value of the parameter

resource=<?AJIZT?>\srcpdf\srcdef.xml 
name=timmy
file=timmy.txt

I am able to change these parameters and expecting output to be

resource=htp://localhost/mydocs/doc.pdf
name=john
file=john.txt

But my output looks like this:

resource=htp://localhost/mydocs/doc.pdf
resource=<?AJIZT?>\srcpdf\srcdef.xml 
name=john
name=timmy
file=john.txt
file=timmy.txt

How can I remove the duplicates? Thanks

IMO fwrite is no bad idea, you should pursure that and find out what the problem was. With statements like 'was not sucessful' you won't find any help! — Anonymous, Nov 23 '11 at 13:26
I guess the problem is that Raaks wants to have the like that begins with "resource=" only once. right? — belgther, Nov 23 '11 at 13:32
Hi raaks : http://stackoverflow.com/questions/2159059/string-replace-in-a-large-file-with-php this will solve your problem — vikas, Nov 23 '11 at 13:34

Moen · Accepted Answer · 2011-11-23T13:48:12.087

If your config file is not too big you can use file_get_contents and file_puts_contents. It allow you to manipulate your file as a big string.

$url = 'htp://localhost/mydocs/doc.pdf';

$file='config.cfg';
$file_data = explode("\n",file_get_contents($file));

foreach($file_data as $line) {
  list($key, $value) = explode('=', $line);
  if($key == "resource") {
    $res_data[] = "$key=$url\n";
    continue;
  }
  $res_data[] = $line;

}

file_put_contents("config.cfg", join("\n",$res_data));

Warning, check your end-of-line delimiters:

explode("\n",file_get_contents($file));

should be

explode("\r\n",file_get_contents($file));

If you are familiar with it, preg_replace can do the job well.

Hi Moen,thanks a lot for your piece of code it works perfectly fine. I have just one more question to add to this. What if I want to replace multiple strings instead of one, like resource, name, id, etc etc — 125369, Nov 23 '11 at 14:47

Replace path string in a config file using PHP

1 Answers1