(-$a)

<?php $a = 5; echo -$a ; ?>

(+)

<?php $a = 5; $b = 6; echo $b+$a ; ?>

(-)

<?php $a = 5; $b = 6; echo $b-$a ; ?>

(*)

<?php $a = 5; $b = 6; echo $b*$a ; ?>

(/)

<?php $a = 5; $b = 6; echo $b/$a ; ?>

(%)

<?php $a = 6; $b = 2; $c =($a%$b)?'has a Remainder':'no remainder'; 

echo $c; ?>

// 6 Modulus 2 there are no remainder //If no remainder = true output no remainder

(**)

<?php $a = 6; $b = 2; $c = $a ** $b; echo $c; ?>

//6 power of 2 is equal to 36

(==)

<?php $a = 5; $b=5; $c=($a==$b)?'True':'False' ;

 
echo $c; ?>

//$a is Equal to $b so the result is True

(===)

<?php $a = 'String'; $b=5; $c=($a===$b)?'True':'False' ;

 
echo $c; ?>

//$a is a String $b is a number they are not identical

(!=)/(<>)

<?php $a =6; $b=5; $c=($a!=$b)?'True':'False' ; 

 
echo $c;?>

//$a is 6 and $b is 5 so they are not equal

<?php $a =6; $b=5; $c=($a<$b)?'True':'False' 

 
echo $c;; ?>

//$a is 6 and $b is 5 so a is less b , is false

<?php $a =6; $b=5; $c=($a>$b)?'True':'False' 

 
echo $c;; ?>

//$a is 6 and $b is 5 so a is Greater than b is
true

<?php $a =4; $b=5; $c=($a<=$b)?'True':'False' 

 
echo $c;; ?>

//$a is 4 and $b is 5 so a is less than equal to b ,
is true

<?php $a =4; $b=5; $c=($a>=$b)?'True':'False' 

 
echo $c;; ?>

//$a is 4 and $b is 5 so a is More than equal to b ,
is False

<?php $a =4; $b=5; $c=($a<=>$b)?'True':'False' 

 
echo $c;; ?>

//$a is less than or equal to
or greater than $b or greater than 0
is True

<?php 
$a = 4; 
$b=5; 

 
$c=$a??$b?'True':'False' ;
echo $c; ?>

//the First Column
form left to Right has a value
and is not null

<?php $a = True;$b= True;

$c=($a and $b)?'True':'False' ;
echo $c;

<?php $a = False;$b= True;

$c=($a or $b)?'True':'False' ;
echo $c;

<?php $a = False;$b= True;

$c=($a xor $b)?'True':'False' ;
echo $c;

//Either a or b is true but not
both