Uložení dat do textového souboru

<?
if (isset($_SESSION['admin'])) {

$bantext = $_REQUEST['bantext'];
$banip = $_REQUEST['banip'];

if ($banip){

if (!(file_exists($ip_file))){ 
fopen($ip_file,"w") or die("Can't open the file $ip_file");;
$data=file($ip_file);	
}else{
fopen($ip_file,"r");
$data=file($ip_file);	
}

?>
<form method="POST" action="gb_functions.php?banip=none">
    <b><? echo $la35; ?> </b><br />
	<? echo $la36; ?>.<br />
	<p><textarea rows="14" name="iptext" cols="20"><?
	for ($i=0; $i<sizeof($data); $i++){
	$iplist = $iplist.trim($data[$i])."\n";
	}
	if($banip == "none"){
	$iplist = $iptext;
	}else if($banip == "banip"){
	$iplist = $iplist;
	}else{
	$iplist = $iplist.$banip;
	}
	
	echo $iplist;
	?></textarea></p>
	<p><input type="submit" value="<? echo $la37; ?>" name="SaveB">
	
	<?
	if($SaveB){
	$data=@fopen($ip_file,"w");
	if (!$data) return false;
	flock($data, LOCK_EX);
	fwrite($data,$iplist);
	flock($data, LOCK_UN);
	fclose($data);

	echo ("<font color = red> <b>$la38 </b> </font><br>");
	}
	?>