Delete Line in Text File

[rpanning]

I havn't worked this specificly with text files yet. Basicly, I have a file which has records in the format 'ip:timestamp'. What I need to do is delete the record if its over 15 minutes old. How do I only delete the one record?

Right now I've got an fopen and fgets to read each record. Then I validate the timestamp. Now I need to delete the old ones. Any help would be great. Thanks

[planetsim]

Use File that will get the entire file than from there explode it into an array

$array = explode("\n",$file);

from there do a loop of each line of course you will need to explode it again like so

$newfile = ''; //stop errors
for ($i=0;$i<=(count($array)-1);$i++) {
  //seperate ip and timestamp
  $sep=explode(";",$array[$i]);
  if ($sep['1']<=(time()-(60*15)) {
     ///dont add into new array
  } else {
     $newfile .= $array[$i]
  }
}

Its not correct so it will need some fixing, but its a start

[devinemke]

$file_array = file ('file.txt');

foreach ($file_array as $value)
{
	$value = trim ($value);
	$explode = explode (':', $value);
	if ((time () - $explode[1]) < 900) {$recent[] = $value;}
}

$recent = implode ("\n", $recent);
$handle = fopen ('file.txt', 'w');
fwrite ($handle, $recent);
fclose ($handle);

[rpanning]

Hi, thanks for your input. I am working on a function which deletes a line from a file. It kind of does the same thing your example does. I'm now working on it to accept an array of lines to be deleted but here is what I have so far. If you see any changes needed let me know, I havn't fully tested it yet.

function delete_line($line, $file)
{
    // Read the file into an array. //
    if (($contents = file($file)) !== false) {

    // Get the array index number to be deleted. //
    if (is_string($line)) {
        if (($key = array_search($line, $contents)) === false) {
            trigger_error('Could not find the line string to be deleted.');
            return(false);
        }
    } elseif (is_int($line)) {
        $key = $line - 1; // Line number passed will be one less in the array.
        if (!array_key_exists($key, $contents)) {
            trigger_error('Could not find the line number to be deleted.');
            return(false);
        }
    } else {
        trigger_error('The line argument must be the line number or line string to be deleted.');
        return(false);
    }

    // Delete the array index. //
    unset($contents[$key]);

    // Rewrite the file without the line. //
    if ($fp = fopen($file, "w")) {
        $rtn = true;
        foreach ($contents as $key => $content) {
            if (fwrite($fp, $content) === false) {
                trigger_error('Could not rewrite the line number ' . ($key+1) . ' to the file. [' . $file . ']');
                $rtn = false;
            }
        }
        fclose($fp);
        return($rtn);
    } else {
        trigger_error('Could not open the file to rewrite the data. [' . $file . ']');
        return(false);
    }
} else {
    trigger_error('Could not read the file. [' . $file . ']');
    return(false);
}
}