PHP Operators Tutorial

This tutorial will show the main operators that can be used in PHP for: sum, multiplication, divison, equalities, logic operators and so on.

Arithmetic operators :

$a + $b
$a – $b
$a * $b
$a / $b

For mod we can use $a % $b, which gives us the rest of $a divided to $b.

<?php $a=14; $b=6; $c=3; $sum = $a+$b; $decrease = $a-$b; $multiplication =$a*$b; $division = $a/$b; $modulo = $a % $c; echo $a."+".$b."=".$sum."<br />“;<br /> echo $a.”-“.$b.”=”.$decrease.”<br />“;<br /> echo $a.”x”.$b.”=”.$multiplication.”<br />“;<br /> echo $a.”:”.$b.”=”.$division.”<br />“;<br /> echo $a.”%”.$c.”=”.$modulo;<br /> ?>

Attribution operators :

$a=7;<br /> $a+=6;<br /> //the value of $a will be 13, same as $a = $a + 6;<br /> $b=”Hello “;<br /> $b.=”world”;<br /> //The value of $b will be “Hello World”.

Operators used for comparison :

equality: $a == $b, returns TRUE if $a equals $b, FALSE otherwise<br /> identical: $a === $b returns TRUE if $a is the same with $b.<br /> different: $a <> $b returns TRUE is $a is different that $b<br /> different: $a != $b<br /> smaller: $a < $b bigger: $a > $b<br /> smaller or equal: $a <= $b bigger or equal: $a => $b

Logic operators :

NOT: !$a returns TRUE if $a is FALSE.
AND: $a && $b returns TRUE if $a and $b are TRUE, FALSE otherwise.
You can use also the keyword and instead of &&.
OR: $a || $b returns TRUE if $a or $b are TRUE.
You can use also the keyword or instead of ||.
XOR: $a xor $b returns TRUE if $a or $b are TRUE, but not both in the same time.

Multiple operators :

<?php $a=14; $b=5; $c=3; echo $a."+".$b."+".$c."=".($a+$b+$c)."<br />“;<br /> echo $a.”x”.$b.”-“.$c.”=”.($a*$b-$c);<br /> ?>

Incremenation and decremantation :

<?php $a=7; $b=7; $c=7; $d=7; echo "post incremenation of 7 is: ".$a++."<br />“;<br /> echo “post decremenation of 7 is: “.$b–.”<br />“;<br /> echo “pre incremenation of 7 is: “.++$c.”<br />“;<br /> echo “pre decremantion of 7 is: “.–$d;<br /> ?>

Thanks for reading this PHP tutorial !