Php operators

Operators

                            Like c++ in php use different type of operators

• Arithmetic operators in php
• String operators in php
• Assignment operators in php
• Increment and decrements operators in php
• Comparison operators in php
• Logical operator in php

1-Airthmetic Operator:

                                                    Arithmetic operator use in php that is +(plus),-(subtract),*(multiply),/(divide),%(modulus)

Operator	Name	Example
+	Plus	$a+$c
-	Subtract	$a-$c
*	Multiply	$a*$c
/	Divide	$a/$c
%	Modulus	$a%$c

Here  $a%$c mean it will return reminder.

Program:

<?php

$a=5;

$c=2;

echo $a+$c;

echo “<br/>”;

echo $a-$c;

echo “<br/>”;

echo $a*$c;

echo “<br/>”;

echo $a/$c;

echo “<br/>”;

echo $a%$c;

?>

Output:

                      7

                      3

                      10

                      2.5

                      1

2-String operators:

Operator	Name	explanation
.	Concatenation	It concatenate two or more strings
.=	Concatenation assignment	It concatenate and assign the value of one string to other

Program:

<?php

$str="hello php";

$str2="programminglogic";

echo $str . $str2;

echo “<br/>”;

$str .=$str2;

echo $str;

?>

Output:

         hello php programminglogic

         hello php programminglogic

3-Assignment operator

                                          Assignment operator use in php that is "="

here i made a simple program in which i concatenate two string then its value will be assign to other new variable.

Program:

<?php

$str="hello php";

$str2="programminglogic";

$str3=$str . $str2;        //assign value

echo $str3;

?>

Output:

         hello php programminglogic

4-Increment and decrement operators:

                                                                   like c++ we use same increment and decrement operator in php 

Operator	Name	Explanation
$a++	Post increment	First display value then increment
$++a	Pre-increment	It first increment then display the output
$a--	Post-decrement	First display the output then decrement
$--a	Pre-decrement	It first decrement then display the output

Program:

<?php

$s=5;

echo ++$s."<br/>";//concatenate <br/>tag for next line 
$s=5;

echo $s++."<br/>";

$s=5;

echo $s--."<br/>";

$s=5;

echo --$s."<br/>";

?>

Output:

                     6

                     5

                     5

                     4

5-comparison operator:

                                              

Operator	Name	Explanation
==	Equal	Return true if two value will be equal
===	Identical	Return true if two value will be equal but same data type.
!=	Not equal	Return true if two value will be not equal
!==	Not identical	Return true if two value will be not equal but not same data type.
<>	Not equal	It alternate of !=
>	Greater than	Return true if first value will be greater than second
<	Less than	Return true if first value will be less than second
>=	Greater than or equal	Return true if first value will be greater or equal to the second
<=	Less than or equal	Return true if first value will be less than or equal second

its example will be discuss in if else statement

6-logical operators:

Operator	Name	Explanation
and /&&	And	Return true if all value will true
or  / ||	Or	Return false if all value will be false
!	Not	Return true if false