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Operators In PHP

Purpose

Types Of Operators

1. Arithmetic operators
2. Assignment operators
3. Incrementing/Decrementing operators
4. Comparison operators
5. Logical operators

Arithmetic Operators

	<?PHP
echo "Addition", "\n", 1 + 2, "<br>";
echo "Subtract", "\n", 2 - 1, "<br>";
echo "Multiplication", "\n", 2 * 3, "<br>";
echo "Division", "\n", 4 * 2, "<br>";
echo "Modulus", "\n", 5 % 3, "<br>";
echo "Negation", "\n", -3, "<br>";
echo "Concatenation", "\n", "wel" . "come", "<br>";
?>

Assignment Operators

<?php
$a = 1;
$b = 2;

$a = $b;
echo $a, "\n";

$a += $b;
echo $a, "\n";

$a -= $b;
echo $a, "\n";

$a *= $b;
echo $a, "\n";

$a /= $b;
echo $a, "\n";

$a %= $b;
echo $a, "\n";
?>

Incrementing/Decrementing Operators

<?php
$var = 4;
echo ++$var;
echo $var++;
echo --$var;

echo $var--;
?>

1. Value of the variable "$var" is initialized with 4
2. In the first echo statement, the value of the variable is incremented by one (value becomes 5) and then displays the value
3. In the second echo statement the value of the variable is displayed first then increments by one. At the time of display, the value of the variable is 5 and after that, it has been incremented to 6
4. In the third echo statement, the value of the variable is first decremented by one and then displays on the screen. After the last operation the value was incremented to 6 and now after the value is decremented the value of the variable becomes 5 again. So, the third echo statement also displays the value as 5
5. In the last echo statement, the value is first displayed and then decrements. So, the last echo statement also displays 5

Comparison Operators

Logical Operators