pop3 error

<?php
session_start( );
		## Instellingen voor webmail! ##

$config['pop3_server']					=	"mail.wmtools.be";
$config['smtp_server']					=	"mail.wmtools.be";
$config['pop3_poort']					=	110;
$config['smtp_poort']					=	25;
$txt['error']							=	'Er kon geen verbinding worden vastgesteld met de pop3 server!';
$txt['error2']							=	'Fout wachtwoord en / of gebruikersnaam!';

$mailserver = @fsockopen( $config['pop3_server'], $config['pop3_poort'], &$errno, &$errstr, 30 );

@mysql_connect( "localhost", "", "" );
@mysql_select_db( "wmtools_" );

if( isset( $_SESSION['webmail_pop3_pass'] ) == false OR isset( $_SESSION['webmail_pop3_user'] ) == false && eregi( "inloggen.php", $_SERVER['REQUEST_URI'] ) == false ) {
	//header( "Location: inloggen.php" );
}

/* POP3 Server Connect */
function verbinding_maken( ) {
	global $config, $txt, $mailserver;
	if( $mailserver == false ) {
		return $txt['error'];
	}
	else{	
		$buffer = fgets( $mailserver, 512 );
		$buffer = "USER " . $_SESSION['webmail_pop3_user'] . "\r\n";
		fputs( $mailserver, $buffer );
		$buffer = fgets( $mailserver, 512 );
		
		if( strpos( $buffer, "err" ) !== false ) {
			include "disconnect_pop3.php";
			return false;
		}
		else{
			$buffer = "PASS " . $_SESSION['webmail_pop3_pass'] . "\r\n";
			fputs( $mailserver, $buffer );
			
			$buffer = fgets( $mailserver, 512 );
			
			if( strpos( $buffer, "err" ) !== false ) {
				include "disconnect_pop3.php";
				echo false;
			}
		}
		return true;
	}
}
?>

<?php
session_start( );
		## Instellingen voor webmail! ##
 
$config['pop3_server']					=	"mail.wmtools.be";
$config['smtp_server']					=	"mail.wmtools.be";
$config['pop3_poort']					=	110;
$config['smtp_poort']					=	25;
$txt['error']							=	'Er kon geen verbinding worden vastgesteld met de pop3 server!';
$txt['error2']							=	'Fout wachtwoord en / of gebruikersnaam!';
 
$mailserver = @fsockopen( $config['pop3_server'], $config['pop3_poort'], &$errno, &$errstr, 30 );
 
@mysql_connect( "localhost", "", "" );
@mysql_select_db( "wmtools_" );
 
if( isset( $_SESSION['webmail_pop3_pass'] ) == false OR isset( $_SESSION['webmail_pop3_user'] ) == false && eregi( "inloggen.php", $_SERVER['REQUEST_URI'] ) == false ) {
	//header( "Location: inloggen.php" );
}
 
/* POP3 Server Connect */
function verbinding_maken( ) {
	global $config, $txt, $mailserver;
	if( $mailserver == false ) {
		return $txt['error'];
	}
	else{	
		$buffer = fgets( $mailserver, 512 );
		$buffer = "USER " . $_SESSION['webmail_pop3_user'] . "\r\n";
		fputs( $mailserver, $buffer );
		$buffer = fgets( $mailserver, 512 );
 
		if( strpos( $buffer, "err" ) !== false ) {
			include "disconnect_pop3.php";
			return false;
		}
		else{
			$buffer = "PASS " . $_SESSION['webmail_pop3_pass'] . "\r\n";
			fputs( $mailserver, $buffer );
 
			$buffer = fgets( $mailserver, 512 );
 
			if( strpos( $buffer, "err" ) !== false ) {
				include "disconnect_pop3.php";
				echo false;
			}
		}
		return true;
	}
}
?>

<?php
include "_BeStAnDeN_/config.inc.php";

if( verbinding_maken( ) == false ) {
	header( "Location: inloggen.php" );
}
else{

	$buffer = "STAT\r\n"; 
	fputs( $mailserver, $buffer);

	$buffer = fgets( $mailserver, 512 ); 
	$mailsum = substr( $buffer, 4, 2 ); 
	$mailmem = substr( $buffer, 6, strlen( $buffer ) - 6 );
	
	?>
	<table border="0" width="30%" cellspacing="0" cellpadding="0">
		<tr>
			<td width="20%"><b>Aantal e-mails:</b></td>
			<td width="10%"><?=$mailsum; ?></td>
		</tr>
		<tr>
			<td width="20%"><b>Mailbox groote:</b></td>
			<td width="10%"><?=$mailmem; ?></td>
		</tr>
	</table>
	<?php
	if( $mailsum == 0 ) {
		?>
		<center>U heeft momenteel <b>geen</b> e-mail berichten in uw inbox staan!</center>
		<?php
	}
	else{
   ... Alles weergeven ...
   ... Is te lange code om weer te geven ...
	}
}
?>

<?php
include "_BeStAnDeN_/config.inc.php";
 
if( verbinding_maken( ) == false ) {
	header( "Location: inloggen.php" );
}
else{
 
	$buffer = "STAT\r\n"; 
	fputs( $mailserver, $buffer);
 
	$buffer = fgets( $mailserver, 512 ); 
	$mailsum = substr( $buffer, 4, 2 ); 
	$mailmem = substr( $buffer, 6, strlen( $buffer ) - 6 );
 
	?>
	<table border="0" width="30%" cellspacing="0" cellpadding="0">
		<tr>
			<td width="20%"><b>Aantal e-mails:</b></td>
			<td width="10%"><?=$mailsum; ?></td>
		</tr>
		<tr>
			<td width="20%"><b>Mailbox groote:</b></td>
			<td width="10%"><?=$mailmem; ?></td>
		</tr>
	</table>
	<?php
	if( $mailsum == 0 ) {
		?>
		<center>U heeft momenteel <b>geen</b> e-mail berichten in uw inbox staan!</center>
		<?php
	}
	else{
   ... Alles weergeven ...
   ... Is te lange code om weer te geven ...
	}
}
?>

$mailmem = substr( $buffer, 6, strlen( $buffer ) - 6 );

$mailmem = substr( $buffer, 6, strlen( $buffer ) - 6 );

$mailmem = substr("$buffer, 6, strlen('$buffer') - 6");

$mailmem = substr("$buffer, 6, strlen('$buffer') - 6");

<?php
$sTekst = "Hallo";

echo $sTekst;
// output: Hallo

echo "$sTekst";
// output: Hallo

echo '$sTekst';
// output: $sTekst

?>

<?php
$sTekst = "Hallo";
 
echo $sTekst;
// output: Hallo
 
echo "$sTekst";
// output: Hallo
 
echo '$sTekst';
// output: $sTekst
 
?>