mysql - PHP Notice: Use of undefined constant

I have a strange error message after using the post to wall function. It did successfully post to the wall however i got a very weird strange error.

[Mon Dec 28 12:47:36 2015] [error] [client 5.29.224.120] PHP Notice: Use of undefined constant female - assumed 'female' in /datas/vhosts/nf.com/httpdocs/agence1948/result.php on line 178, referer: https://nf.com/agence1948/question.php
[Mon Dec 28 12:47:36 2015] [error] [client 5.29.224.120] PHP Notice: Use of undefined constant male - assumed 'male' in /datas/vhosts/nf.com/httpdocs/agence1948/result.php on line 182, referer: https://nf.com/agence1948/question.php

I use this code

= 15 && $_SESSION['score'] <= 20): ?>
		
		
			
		

		
		
			
		
		

someone knows whats is the problem?

thank you