php operators

$y = $x + 5;
$x += 5;	decriment
$x -= 5;	incriment
$x = 15;	less than operator
if ($x < 10){
echo 'true';
} else {
echo 'false';
}
?>
<=
==
!=
>=
<=
>
<
arithmetic operators
+
-
*
/
%	modulous( remainder)
++
--
$a = 1;
$b = 2;
$c = $a + $b;	3
echo 'result' '.$c;
$c++;
locgical opertors
&&
||
lesson 6
loops ,do while for loop
<? Php
//loops
loop - a work have to do repeateldy	if it is 5 times we can write, but if we need 10000 times we cant write because it is a time waste
	for that purpose we will use loops
echo 'hello vamsi "<br"';
echo 'hello vamsi "<br"';
echo 'hello vamsi "<br"';
echo 'hello vamsi "<br"';
echo 'hello vamsi "<br"';
?>
<?php
$counter = 1;
while($counter <=5){	after prints , it incrimetns counter, then go to check conditon ,
echo ' hello php <br/>';
counter++;
?>
echo $counter.' hello php <br>';	it prints counter value with text
<?php
for ($c=1; $c <= 10; $c++){	initilisation value, condiiton, modifier
echo 'pho tytorials </br.';
}
?>
do while	without checking condition , ist prints then check conditon
do{
echo $counter.' hello telug computer world <br>;
$counter++;
} while(counter <= 10);
$counter += 2;	counter= counter+2
switch statement lesson 7
<?php
$num = 1;
switch ($num){
case 1: echo 'one;
break;
case 2: echo 'two';
break;
default: echo 'number not found';	if any swithc statement not true, finally it will execute
}
?>
how to write a programm accessed by two users only
$name = 'sameer' ;
switch ($name){
case 'sameer' :
case 'vicky' :
echo 'u can enter'
break;
default;
echo 'you cant enter';
}
string operators concatenation .   $a . $b concatenation and assignment .=
$a .= $b $a = $a.$b; while for do while var+=2 switch how to addd number to variable how to compare using greater  how to add  incrimetn  whats the use of loop how to print one value in 100 times using single statement how to print one statement in unlimited time using condition whats the use of do while loop how to execute only one statement based on the answer how to share the resources only two person if they entered valuable names

php operators

arithmetic
	(+,-,*,/,%,**)
assignment	(=,+=,-=,*=,/=,%=)
bitwise opearators	(&,|,^,~,<<,>>)
comparision opearators	(==,===,!==,!=,<>,<,>,<=,>=,<=>)
<=>	Spaceship
$a <=>$b	Return -1 if $a is less than $b
	Return 0 if $a is equal $b
	Return 1 if $a is greater than $b
incrimenting operators
incriment ++
decrement --
++$a	Increment the value of $a by one, then return $a
$a++	Return $a, then increment the value   of $a by one
--$a	Decrement the value of $a by one, then return $a
$a--	Return $a, then decrement the value of $a by on
logical opearators
and, or , xor, !, &&, ||
string operators
concatenation (.)
$a . $b	Concatenate both $a and $b
concatenation and assignment	(.=)
$a .= $b	First concatenate $a and $b, then assign the concatenated string to $a, e.g. $a = $a . $b

array operators
+	Union	$a + $y	Union of $a and $b
==	Equality	$a == $b	Return TRUE if $a and $b have same key/value pair
!=	Inequality	$a != $b	Return TRUE if $a is not equal to $b
===	Identity	$a === $b	Return TRUE if $a and $b have same key/value pair of same type in same order
!==	Non-Identity	$a !== $b	Return TRUE if $a is not identical to $b
<>	Inequality	$a <> $b	Return TRUE if $a is not equal to $b

instance of	to find it is a object or not
The type operator instanceof is used to determine whether an object, its parent and its derived class are the same type or not. Basically, this operator determines which certain class the object belongs to. It is used in object-oriented programming
<?php
//class declaration
class Developer
{}
class Programmer
{}
//creating an object of type Developer
$charu = new Developer();
//testing the type of object
if( $charu instanceof Developer)
{
echo "Charu is a developer.";
}
else
{
echo "Charu is a programmer.";
}
echo "</br>";
var_dump($charu instanceof Developer);           //It will return true.
var_dump($charu instanceof Programmer);       //It will return false.
?>
Charu is a developer.
bool(true) bool(false)