John
Joe
George
Jake

$file=fopen("toApprove.txt","r+");
$file2=fopen("temp.txt","w+");
while(!feof($file))
{
	$str = fgets($file);
	if($str != $_GET["file"])
	{
		fwrite($file2,$str);
	}
}
fclose($file);
fclose($file2);

$file=fopen("toApprove.txt","w+");
$file2=fopen("temp.txt","r");
while(!feof($file2))
{
	$str = fgets($file2);
	fwrite($file,$str);
}
fclose($file);
fclose($file2);

$result = $Db->Query("DELETE FROM `table` WHERE `column` = '".mysql_real_escape_string($_GET["file"])
."' LIMIT 1";

// retrieve file into a string
$txt = file_get_contents('toApprove.txt');
// replace the line with $_GET["file"], assuming line break is \n
$txt = str_replace(trim($_GET["file"])."\n", '', $txt);
// write the string back to the file
file_put_contents('toApprove.txt', $txt);

// retrieve the file into an array where each line is a value
$Array = file('toApprove.txt');
// assuming unique values, lets remove the Array key with value $_GET["file"]
unset($Array[array_search(trim($_GET["file"]), $Array)]);
// explode the array into string with line breaks seperation and put everthing back in the file
file_put_contents('toApprove.txt', implode("\n", $Array));

if (!file_exists('file_put_contents')) {
// create a simple user function to emulate PHP5's file_put_contents() 
function file_put_contents($file, $contents) {
fwrite($fp = fopen($file), $contents, strlen($contents));
fclose($fp);
}
}