[Opgelost] Gastenboek met 2 uitgangen

<?
  
  $amount=15;

  if ($_GET['action']=='write') {
  	header('location: gb.php?action=read&start=0');
    $file=fopen('gastenboek.txt','a');

    $message=str_replace("\r",'',$message);
    $message=str_replace("\n",'{{',$_GET['message']);
    fwrite($file,$_GET['name'].'|||'.$_GET['email'].'|||'.date('d-m-Y').'|||'.$_GET['url'].'|||'.$message."\n");
    fclose($file);
    
  }

  $start=(isset($_GET['start'])?$_GET['start']:0);
  $gastenboek=Array();
  $gastenboek=file('gastenboek.txt');

?>

 <SCRIPT language="JavaScript">
    function validate(form) {
      if (form.name.value=="") {
        alert("Vul je naam in");
        return false;
      } else if (form.message.value=="") {
        alert("Vul je bericht in");
        return false;
      }
    }
    </SCRIPT>
    
 
  <P>
  <TABLE width="100%" cellspacing="0" cellpadding="0" >
    <TR>
      <TD><b>Gastenboek</b><br></TD>
    </TR>
  </TABLE>
  <TABLE width="100%" cellspacing="0" cellpadding="0">
    <TR>
      <TD class="side"> Berichten <? echo $start+1; ?> tot en met <? echo min($start+$amount,sizeof($gastenboek)); ?>.
        <HR> <TABLE width="100%" >
          <?
          $gastenboek=array_reverse($gastenboek);
          for ($i=$start;$i<$start+$amount && $i<sizeof($gastenboek);$i++) {
            list($name,$email,$date,$url,$message)=explode('|||',$gastenboek[$i]);
            $message=str_replace('{{',"\n",$message);
            echo '<TR><TD><B>'.($email!=""?'<A href="mailto:'.$email.'">'.$name.'</A>':$name).'</B></TD><TD align="right"><B>'.$date.'</B></TD></TR>'."\n";
            echo ($url!=""?'<TR><TD colspan="2"><A href="'.$url.'" target="_blank">'.$url.'</A></TD></TR>':'')."\n";
            echo '<TR><TD colspan="2"><SPAN>'.str_replace("\n",'<BR>',htmlspecialchars($message)).'</SPAN></TD></TR>'."\n";
            echo '<TR><TD colspan="2"><HR></TD></TR>'."\n";
          }
        ?>
        </TABLE>
        <CENTER>
          <?
          if ($start>0) echo '<A href="gb.php?start='.max(0,$start-$amount).'"><<<</A> ';
          if ($start+$amount<sizeof($gastenboek)) echo ' <A href="gb.php?start='.($start+$amount).'">>>></A>';
        ?>   </CENTER></TD>
    </TR>
  </TABLE>
  <P>
  <TABLE width="100%" cellspacing="0" cellpadding="0" >
    <TR>
      <TD class="side">Nieuw bericht</TD>
    </TR>
  </TABLE>
  <TABLE width="100%" cellspacing="0" cellpadding="0" >
    <TR>
      <TD class="side"> <FORM action="gb.php" method="GET" onSubmit="return validate(this);">
          <INPUT type="hidden" name="action" value="write">
            <TR>
              <TD>Naam:</TD>
              <TD><INPUT type="text" name="name" size="30"></TD>
            </TR>
            <TR>
              <TD>E-Mail:</TD>
              <TD><INPUT type="text" name="email" size="30">
                (optioneel)</TD>
            </TR>
            <TR>
              <TD>Homepage:</TD>
              <TD><INPUT name="url" type="text" value="http://" size="30">
                (optioneel)</TD>
            </TR>
            <TR>
              <TD>Bericht:</TD>
              <TD><TEXTAREA name="message" cols="50" rows="5"></TEXTAREA></TD>
            </TR>
          </TABLE>
          <INPUT type="submit" value="Verstuur">
        </FORM></TD>

<?
 
  $amount=15;
 
  if ($_GET['action']=='write') {
  	header('location: gb.php?action=read&start=0');
    $file=fopen('gastenboek.txt','a');
 
    $message=str_replace("\r",'',$message);
    $message=str_replace("\n",'{{',$_GET['message']);
    fwrite($file,$_GET['name'].'|||'.$_GET['email'].'|||'.date('d-m-Y').'|||'.$_GET['url'].'|||'.$message."\n");
    fclose($file);
 
  }
 
  $start=(isset($_GET['start'])?$_GET['start']:0);
  $gastenboek=Array();
  $gastenboek=file('gastenboek.txt');
 
?>
 
 <SCRIPT language="JavaScript">
    function validate(form) {
      if (form.name.value=="") {
        alert("Vul je naam in");
        return false;
      } else if (form.message.value=="") {
        alert("Vul je bericht in");
        return false;
      }
    }
    </SCRIPT>
 
 
  <P>
  <TABLE width="100%" cellspacing="0" cellpadding="0" >
    <TR>
      <TD><b>Gastenboek</b><br></TD>
    </TR>
  </TABLE>
  <TABLE width="100%" cellspacing="0" cellpadding="0">
    <TR>
      <TD class="side"> Berichten <? echo $start+1; ?> tot en met <? echo min($start+$amount,sizeof($gastenboek)); ?>.
        <HR> <TABLE width="100%" >
          <?
          $gastenboek=array_reverse($gastenboek);
          for ($i=$start;$i<$start+$amount && $i<sizeof($gastenboek);$i++) {
            list($name,$email,$date,$url,$message)=explode('|||',$gastenboek[$i]);
            $message=str_replace('{{',"\n",$message);
            echo '<TR><TD><B>'.($email!=""?'<A href="mailto:'.$email.'">'.$name.'</A>':$name).'</B></TD><TD align="right"><B>'.$date.'</B></TD></TR>'."\n";
            echo ($url!=""?'<TR><TD colspan="2"><A href="'.$url.'" target="_blank">'.$url.'</A></TD></TR>':'')."\n";
            echo '<TR><TD colspan="2"><SPAN>'.str_replace("\n",'<BR>',htmlspecialchars($message)).'</SPAN></TD></TR>'."\n";
            echo '<TR><TD colspan="2"><HR></TD></TR>'."\n";
          }
        ?>
        </TABLE>
        <CENTER>
          <?
          if ($start>0) echo '<A href="gb.php?start='.max(0,$start-$amount).'"><<<</A> ';
          if ($start+$amount<sizeof($gastenboek)) echo ' <A href="gb.php?start='.($start+$amount).'">>>></A>';
        ?>   </CENTER></TD>
    </TR>
  </TABLE>
  <P>
  <TABLE width="100%" cellspacing="0" cellpadding="0" >
    <TR>
      <TD class="side">Nieuw bericht</TD>
    </TR>
  </TABLE>
  <TABLE width="100%" cellspacing="0" cellpadding="0" >
    <TR>
      <TD class="side"> <FORM action="gb.php" method="GET" onSubmit="return validate(this);">
          <INPUT type="hidden" name="action" value="write">
            <TR>
              <TD>Naam:</TD>
              <TD><INPUT type="text" name="name" size="30"></TD>
            </TR>
            <TR>
              <TD>E-Mail:</TD>
              <TD><INPUT type="text" name="email" size="30">
                (optioneel)</TD>
            </TR>
            <TR>
              <TD>Homepage:</TD>
              <TD><INPUT name="url" type="text" value="http://" size="30">
                (optioneel)</TD>
            </TR>
            <TR>
              <TD>Bericht:</TD>
              <TD><TEXTAREA name="message" cols="50" rows="5"></TEXTAREA></TD>
            </TR>
          </TABLE>
          <INPUT type="submit" value="Verstuur">
        </FORM></TD>