Clean/drop lines from a text file?

[deep]

Hi,

I seam to have a problem deleting lines fron a textfile ... Here is my code:

$fp = fopen("test.txt", "r+");

  $in = "4";
    while(!feof($fp)){
      if(fgetss($fp, 10) == $in."\r\n"){
      fwrite($fp, " ");
    }
  }

fclose($fp);

Lets say my textfile looks like this:

1
2
3
4
5
6
7
8
9

My code will replace the nr 5 in the file with " "... I need it to drop the line "4".. and make it look like this:

1
2
3
5
6
7
8
9

Ideas? 🙂

[maxpup979]

I always open the file, read the lines, and create an array of the lines I wish to keep. Then I rewrite the entire file based off of the array of lines I kept.

[devinemke]

<?php
$file = file('test.txt');
foreach ($file as $key => $value)
{
	$value = trim($value);
	if ($value == 4) {unset($file[$key]);}
	else {$file[$key] = $value;}
}

$handle = fopen('test.txt', 'w') or exit('could not read file');
$bytes = fwrite($handle, implode("\r\n", $file)) or exit('could not write to file');
echo $bytes . ' bytes written to test.txt';
?>