merhaba arkadaşlar;

forumda telefon alanının zorunlu olmasını istiyorum bu nasıl yapabilirim?

eğer telefon numarası yazılmazsa; sizinle iletişime geçebilmemiz için lütfen telefon numaranızı yazınız ibaresinin çıkçasını istiyorum.

yardımcı olacak arkadaşlara şimdiden teşekkür ederim selamlar.

<?php

	$Ileti_Konusu=$_POST['Ileti_Konusu'];
	$Adi_Soyadi=$_POST['Adi_Soyadi'];
	$Firma=$_POST['Firma'];
	$email=$_POST['email'];
	$Tel_Numara=$_POST['Tel_Numara'];
	$Fax_Numara=$_POST['Fax_Numara'];
	$Ileti=$_POST['Ileti'];

	$mesaj="	
	<table width='322' border='0' cellpadding='2' cellspacing='1' bgcolor='#CCCCCC' class='beyaz'>
		<tr bgcolor='#909090'>
		<td valign='top' width='101' bgcolor='#F8F8F8' align='right'>
			<span style='font-weight: 700; font: Bold 11px Tahoma'>Adı Soyadı :</span>
		</td>
		<td width='210' bgcolor='#F8F8F8'><font face='Tahoma' style='font-size: 11px' color='#0000FF'>$Adi_Soyadi</font></td>
	  </tr>
	  <tr align='center' bgcolor='#909090'>
		<td colspan='2' width='287' bgcolor='#FFFFFF' align='right'><font face='Tahoma' style='font-size: 11px; font-weight: 700'>&nbsp;</font></td>
	  </tr>
		<tr bgcolor='#909090'>
		<td valign='top' class='duz' width='101' bgcolor='#F8F8F8' align='right'>
		<font face='Tahoma' style='font-size: 11px; font-weight: 700'>Firma :</font></td>
		<td width='210' bgcolor='#F8F8F8'><font face='Tahoma' style='font-size: 11px' color='#0000FF'>$Firma </font></td>
	  </tr>
	  <tr align='center' bgcolor='#909090'>
		<td colspan='2' width='287' bgcolor='#FFFFFF' align='right'>
		<font face='Tahoma' style='font-size: 11px; font-weight: 700'>&nbsp;</font></td>
	  </tr>
		<tr bgcolor='#909090'>
		<td valign='top' class='duz' width='101' bgcolor='#F8F8F8' align='right'>
		<font face='Tahoma' style='font-size: 11px; font-weight: 700'>E-Posta :</font> </td>
		<td width='210' bgcolor='#F8F8F8'><font face='Tahoma' style='font-size: 11px' color='#0000FF'>$email</font></td>
	  </tr>
	  <tr align='center' bgcolor='#909090'>
		<td colspan='2' width='287' bgcolor='#FFFFFF' align='right'>
		<font face='Tahoma' style='font-size: 11px; font-weight: 700'>&nbsp;</font></td>
	  </tr>
		<tr bgcolor='#909090'>
		<td valign='top' class='duz' width='101' bgcolor='#F8F8F8' align='right'>
		<font face='Tahoma' style='font-size: 11px; font-weight: 700'>&nbsp;&nbsp;Telefon :</font> </td>
		<td width='210' bgcolor='#F8F8F8'>
		  <font face='Tahoma' style='font-size: 11px' color='#0000FF'>$Tel_Numara</font>
		  </td>
	  </tr>
	  <tr align='center' bgcolor='#909090'>
		<td colspan='2' width='287' bgcolor='#FFFFFF' align='right'>
		<font face='Tahoma' style='font-size: 11px; font-weight: 700'>&nbsp;</font></td>
	  </tr>
		<tr bgcolor='#909090'>
		<td valign='top' class='duz' width='101' bgcolor='#F8F8F8' align='right'>
		<font face='Tahoma' style='font-size: 11px; font-weight: 700'>&nbsp;&nbsp;Fax :</font> </td>
		<td width='210' bgcolor='#F8F8F8'>
		  <font face='Tahoma' style='font-size: 11px' color='#0000FF'>$Fax_Numara</font></td>
		</tr>
	  <tr align='center' bgcolor='#909090'>
		<td colspan='2' width='287' bgcolor='#FFFFFF' align='right'>
		<font face='Tahoma' style='font-size: 11px; font-weight: 700'>&nbsp;</font></td>
	  </tr>
		<tr bgcolor='#909090'>
		<td valign='top' class='duz' width='101' bgcolor='#F8F8F8' align='right'>
		<span style='font-weight: 700; font: Bold 11px Tahoma'>Konu :</span> </td>
		<td width='210' bgcolor='#F8F8F8'><font face='Tahoma' style='font-size: 11px' color='#0000FF'>$Ileti_Konusu</font></td>
	  </tr>
	  <tr align='center' bgcolor='#909090'>
		<td colspan='2' width='287' bgcolor='#FFFFFF' align='right'>
		<font face='Tahoma' style='font-size: 11px; font-weight: 700'>&nbsp;</font></td>
	  </tr>
		<tr bgcolor='#909090'>
		<td valign='top' class='duz' width='101' bgcolor='#F8F8F8' align='right'>
		<font face='Tahoma' style='font-size: 11px; font-weight: 700'>Mesaj :</font> </td>
		<td width='210' bgcolor='#F8F8F8'><font face='Tahoma' style='font-size: 11px' color='#0000FF'>$Ileti</font></td>
	  </tr>
	  </tr>
	</table>";
html kodu


<table border="0" align="left" width="448" id="table2" style="border-collapse: collapse">
<form action="gonder.php" method="post">
	<tr>
		<td width="239" align="right" class="field">Ad Soyad :</td>
		<td width="214"><input type="text" name="Adi_Soyadi" size="24" class="inputsty"></td>
	</tr>
	<tr>
		<td align="right" class="field">Şehir :</td>
		<td width="214"><input type="text" name="Firma" size="24" class="inputsty"></td>
	</tr>
	<tr>
		<td align="right" class="field">Tel :</td>
		<td width="214"><input type="text" name="Tel_Numara" size="24" class="inputsty"></td>
	</tr>
	<tr>
	  <td align="right" class="field">E-Posta :</td>
	  <td width="214"><input type="text" name="email" size="24" class="inputsty"></td>
	  </tr>
	<tr>
		<td align="right" class="field">Konu :</td>
		<td width="214"><input type="text" name="Ileti_Konusu" size="24" class="inputsty"></td>
	</tr>
	<tr>
		<td height="95" align="right" valign="top" class="field">Mesaj :</td>
		<td width="214"><textarea rows="5" name="Ileti" cols="32" class="inputsty"></textarea></td>
	</tr>
	<tr>
		<td>&nbsp;</td>
		<td width="214"><input type="submit" value="Gönder" style="font-family: Trebuchet MS, Tahoma; font-size: 11px; border: 1px solid #808080; background-color: #FBFBFB; font-weight:bold">		</td>
	</tr></form>