php三元判断

<?php

echo $a=1+1== 2?1+1==11?11:2:1+1==2?2:11;
echo $a=1+1==11?1+1==11?11:2:1+1==2?2:11;

if(1+1==2){
if(1+1==11){
echo 11;
}else{
echo 2;
}

}else{
if(1+1==2){
echo 1;
}else{c
echo 11;
}

}

?>