PHP Operators

$a = 10;
$b = 4;
$sum = $a + $b; //Addition operator
$dif = $a - $b; //Subtraction operator
$pro = $a * $b; //Multiplication operator
$div = $a / $b; //Division operator
$rem = $a % $b; //Modulus operator
$pow = $a ** $b; //Exponentiation operator
echo $sum . "\n";
echo $dif . "\n";
echo $pro . "\n";
echo $div . "\n";
echo $rem . "\n";
echo $pow . "\n";

$a = 10;
$b = 4;
var_dump($a == $b) . "\n";      // Equal operator
var_dump($a === $b) . "\n";     // Identical operator
var_dump($a != $b) . "\n";      // Not Equal operator
var_dump($a <> $b) . "\n";      // Not Equal operator
var_dump($a !== $b) . "\n";     // Not Identical operator
var_dump($a > $b) . "\n";       // Greater than operator
var_dump($a < $b) . "\n";       // Less than operator
var_dump($a >= $b) . "\n";      // Greater than equal to operator
var_dump($a <= $b) . "\n";      // Less than equal to operator

$a = 10;
$b = 10;
$c = 10;
$d = 10;
echo ++$a . "\n";   // Pre-increment operator
echo $b++ . "\n";   // Post-increment operator
echo --$c . "\n";   // Pre-decrement operator
echo $d-- . "\n";   // Post-decrement operator

$a = 10;
$b = 10;
$c = 30;
$d = 8;
$e = 9;
$f = 4;

$x = $a;        // assign operator
echo $x . "\n";
$b += $a;       // Add then assign operator
echo $b . "\n";
$b -= $a;       // Subtract then assign operator
echo $b . "\n";
$d *= $f;       // Multiply then assign operator
echo $d . "\n";
$b /= $a;       // Divide then assign(quotient) operator
echo $b . "\n";
$c %= $e;       // Divide then assign(reminder) operator
echo $c . "\n";

$a = 10;
$b = 20;
var_dump($a == 10 and $b == 20) . "\n";         //And  operator
var_dump($a == 10 or $b == 15) . "\n";          //Or  operator
var_dump($a == 20 xor $b == 10) . "\n";         //Xor  operator
var_dump($a == 18 && $b == 20) . "\n";          //And  operator
var_dump($a == 10 || $b == 20) . "\n";          //Or  operator
var_dump(!($a == 15)) . "\n";                   //Not  operator

$a = "learnE";
$b = "tutorials.com";
echo $a . $b;               // Concatenation operator
echo "\n";
$a .= $b;                   // Concatenate and assign operator
echo $a;

$a = array("a" => "PHP", "b" => "Python");
$b = array("c" => "C++", "d" => "Java");
print_r($a + $b);       // Union operator
var_dump($a == $b);     // Equality operator
var_dump($a === $b);     // Identical operator
var_dump($a != $b);     // Inequality operator
var_dump($a <> $b);     // Inequality operator
var_dump($a !== $b);     // Non-identical operator

$age = 23;
echo $age > 18 ? "can vote" : "cant vote";   // Ternary operator
echo "\n";
echo  $age ?? "no age given";       // Null coalescing operator
echo "\n";
echo $gender ?? "gender not given";       // Null coalescing operator

class Abc
{
}
class Xyz
{
}
$value = new Abc();

var_dump($value instanceof Abc);
var_dump($value instanceof Xyz);

$path = `dir`;
echo $path;
// to find the path of the file

Example before using @

$val = 76 / 0;
echo "Welcome to learnetutorials.com";

Example using @

@$val = 76 / 0;               // while trying to divide a number by 0 it gives error. By using the @ operator we can ignore the error message
echo "Welcome to learnetutorials.com";

Example using @

echo 10 <=> 5;
echo "\n";
echo 5 <=> 10;
echo "\n";
echo 5 <=> 5;

Example using @

$a = 7;
$b = 5;

echo $a & $b;           // bitwise and operator
echo "\n";
echo $a | $b;           // bitwise or operator
echo "\n";
echo $a ^ $b;           // bitwise xor operator
echo "\n";
echo ~$b;               // bitwise not operator
echo "\n";
echo $a << $b;          // bitwise shift left operator
echo "\n";
echo $a >> $b;          // bitwise shift right operator
echo "\n";