php - functions gets the value true even when there is no value -


i traing send mail php , wrote this:

<?php function title() { if(isset($_get['title'])) {     return true; } else {     echo "please write title!";     return false; } }  function mess() { if(isset($_get['mess'])) {     return true; } else {     echo "please write messege!";     return false; } }  if(mess() && title()) {     mail("guycohen801@gmail.com", $_get['title'], $_get['mess']);     echo "the mail has bees send!"; }  ?> <form action="ftp_mail.php" method="get"> title: <input type="text" name="title"  /> messege: <input type="text" name="mess" /> <input type="submit" value="send" /> </form>

but when doesn't writing on $_get['mess'] , $_get['title'] functions mess() , title() gets value true. please help!!

use this

if((isset($_get['mess'])) && ($_get['mess']!=""))

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