form validation without if statements

[Anon]

I know there is a better way, than what I'm doing below...does anyone know of a example form using field validation without the use of if statements, or have any other ways of doing things / reference code? I'd appreciate it a million!

if ($first_name ==""):
$status = False;

	$alert_message1=("Please enter your <b>First Name</b> before submitting this form<br>");

	if ($last_name ==""): 
		$alert_message2=("Please enter your <b>Last Name</b> before submitting this form<br>");
	endif;	

	if ($email_verified == False):
		$alert_message3=("Please enter a <b>Valid Email Address</b><br>");
	endif;

	if ($phone =""): 
		$alert_message4=("Please enter your <b>Phone Number</b> before submitting this form<br>");
	endif;

	if ($subject =""): 
		$alert_message5=("Please enter a <b>Message Subject</b> before submitting this form<br>");
	endif;

	if ($message ==""): 
		$alert_message6=("Please enter your <b>Message</b> before submitting this form<br>");
	endif;

elseif ($last_name ==""):
	$status = False;

	if ($first_name ==""): 
		$alert_message1=("Please enter your <b>First Name</b> before submitting this form<br>");
	endif;

	$alert_message2=("Please enter your <b>Last Name</b> before submitting this form<br>");

	if ($email_verified == False):
		$alert_message3=("Please enter a <b>Valid Email Address</b><br>");
	endif;

	if ($phone  ==""): 
		$alert_message4=("Please enter your <b>Phone Number</b> before submitting this form<br>");
	endif;

	if ($subject  ==""): 
		$alert_message5=("Please enter a <b>Message Subject</b> before submitting this form<br>");
	endif;

	if ($message ==""): 
		$alert_message6=("Please enter your <b>Message</b> before submitting this form<br>");
	endif;

elseif ($email_verified ==False): 
	$status = False;

	if ($first_name ==""): 
		$alert_message1=("Please enter your <b>First Name</b> before submitting this form<br>");
	endif;

	if ($last_name ==""): 
		$alert_message2=("Please enter your <b>Last Name</b> before submitting this form<br>");
	endif;	

	$alert_message3=("Please enter a <b>Valid Email Address</b><br>");

	if ($phone ==""): 
		$alert_message4=("Please enter your <b>Phone Number</b> before submitting this form<br>");
	endif;

	if ($subject ==""): 
		$alert_message5=("Please enter a <b>Message Subject</b> before submitting this form<br>");
	endif;

	if ($message ==""): 
		$alert_message6=("Please enter your <b>Message</b> before submitting this form<br>");
	endif;

elseif ($phone ==""): 
	$status = False;

	if ($first_name ==""): 
		$alert_message1=("Please enter your <b>First Name</b> before submitting this form<br>");
	endif;		

	if ($last_name ==""): 
		$alert_message2=("Please enter your <b>Last Name</b> before submitting this form<br>");
	endif;	

	if ($email_verified == False):
		$alert_message3=("Please enter a <b>Valid Email Address</b><br>");
	endif;

	$alert_message4=("Please enter your <b>Phone Number</b> before submitting this form<br>");

	if ($subject ==""): 
		$alert_message5=("Please enter a <b>Message Subject</b> before submitting this form<br>");
	endif;

	if ($message ==""): 
		$alert_message6=("Please enter your <b>Message</b> before submitting this form<br>");
	endif;

elseif ($subject ==""): 
	$status = False;

	if ($first_name ==""): 
		$alert_message1=("Please enter your <b>First Name</b> before submitting this form<br>");
	endif;		

	if ($last_name ==""): 
		$alert_message2=("Please enter your <b>Last Name</b> before submitting this form<br>");
	endif;	

	if ($email_verified == False):
		$alert_message3=("Please enter a <b>Valid Email Address</b><br>");
	endif;

	if ($phone  ==""): 
		$alert_message4=("Please enter your <b>Phone Number</b> before submitting this form<br>");
	endif;

	$alert_message5=("Please enter a <b>Message Subject</b> before submitting this form<br>");

	if ($message ==""): 
		$alert_message6=("Please enter your <b>Message</b> before submitting this form<br>");
	endif;

elseif ($message ==""): 
	$status = False;

	if ($first_name ==""): 
		$alert_message1=("Please enter your <b>First Name</b> before submitting this form<br>");
	endif;		

	if ($last_name ==""): 
		$alert_message2=("Please enter your <b>Last Name</b> before submitting this form<br>");
	endif;	

	if ($email_verified == False):
		$alert_message3=("Please enter a <b>Valid Email Address</b><br>");
	endif;

	if ($phone  ==""): 
		$alert_message4=("Please enter your <b>Phone Number</b> before submitting this form<br>");
	endif;

	if ($subject  ==""): 
		$alert_message5=("Please enter a <b>Message Subject</b> before submitting this form<br>");
	endif;

	$alert_message6=("Please enter your <b>Message</b> before submitting this form<br>");

Bob the Builder!!

[Anon]

You could use JavaScript to validate your form. JavaScript is probably more suited for this.

Or you could clean up your code using Case statements rather than 'if' statements.