PHP Operators

 <?php

//PHP Operators

/*

Operators are used to perform operations on variables and values.

PHP divides the operators in the following groups:

Arithmetic operators

Assignment operators

Comparison operators

Increment/Decrement operators

Logical operators

String operators

Array operators

Conditional assignment operators

//PHP Arithmetic Operators

The PHP arithmetic operators are used with numeric values to perform common arithmetical operations, such as addition, subtraction, multiplication etc.

Operator Name Example Result

+ Addition $x + $y Sum of $x and $y

- Subtraction $x - $y Difference of $x and $y

* Multiplication $x * $y Product of $x and $y

/ Division $x / $y Quotient of $x and $y

% Modulus $x % $y Remainder of $x divided by $y

** Exponentiation $x ** $y Result of raising $x to the $y'th power

*/

echo "Arithmetic Operators";

echo "<br>";

// Addition

$a = 3;

$b = 5;

$c = $a + $b;

echo "The add is ".$c;

echo "<br>";

//Subtraction

$a = 3;

$b = 5;

$c = $a - $b;

echo "The sub is ".$c;

echo "<br>";

//MULTIPLICATION

$a = 3;

$b = 5;

$c = $a * $b;

echo "The mul is ".$c;

echo "<br>";

//DIVISION

$a = 3;

$b = 5;

$c = $a / $b;

echo "The div is ".$c;

echo "<br>";

//MODULUS

$a = 3;

$b = 5;

$c = $a % $b;

echo "The modu is ".$c;

echo "<br>";

//EXPONENTIATION

$a = 3;

$b = 5;

$c = $a ** $b;

echo "The exponen is ".$c;

echo "<br>";

echo "Assignment Operators";

echo "<br>";

/*

The PHP assignment operators are used with numeric values to write a value to a variable.

The basic assignment operator in PHP is "=". It means that the left operand gets set to the value of the assignment expression on the right.

Assignment Same as Description

x = y x = y The left operand gets set to the value of the expression on the right

x += y x = x + y Addition

x -= y x = x - y Subtraction

x *= y x = x * y Multiplication

x /= y x = x / y Division

x %= y x = x % y Modulus

*/

$b = 10;

echo $b;

echo "<br>";

$b += 10;

echo $b;

echo "<br>";

$b -= 5;

echo $b;

echo "<br>";

$b *= 2;

echo $b;

echo "<br>";

$b/= 3;

echo $b;

echo "<br>";

$b %= 3;

echo $b;

echo "<br>";

//PHP Increment / Decrement Operators

/*

The PHP increment operators are used to increment a variable's value.

The PHP decrement operators are used to decrement a variable's value.

Operator Name Description

++$x Pre-increment Increments $x by one, then returns $x

$x++ Post-increment Returns $x, then increments $x by one

--$x Pre-decrement Decrements $x by one, then returns $x

$x-- Post-decrement Returns $x, then decrements $x by one

*/

echo "Increment / Decrement Operators";

echo "<br>";

$c = 10;

echo ++$c;

echo "<br>";

$c = 10;

echo $c++;

echo "<br>";

$c = 10;

echo --$c;

echo "<br>";

$c = 10;

echo $c--;

echo "<br>";

//PHP Logical Operators

/*

The PHP logical operators are used to combine conditional statements.

Operator Name Example Result

and And $x and $y True if both $x and $y are true

or Or $x or $y True if either $x or $y is true

xor Xor $x xor $y True if either $x or $y is true, but not both

&& And $x && $y True if both $x and $y are true

|| Or $x || $y True if either $x or $y is true

! Not !$x True if $x is not true

*/

/*

echo "Logical Operators";

echo "<br>";

//and

$x = 100;  

$y = 50;

if ($x == 100 and $y == 50) {

    echo "Hello world!";

*/

/*

//or

$x = 100;  

$y = 50;

if ($x == 100 or $y == 80) {

    echo "Hello world!";

//xor

$x = 100;  

$y = 50;

if ($x == 100 xor $y == 40) {

    echo "Hello world!";

$x = 100;  

$y = 50;

if ($x == 100 && $y == 40) {

    echo "Hello world!";    

$x = 100;  

$y = 50;

if ($x == 100 || $y == 40) {

    echo "Hello world!";

//not

$x = 100;  

if ($x !== 90) {

    echo "Hello world!";

} 

*/

?>