PHP operators

PHP operators

PHP operators 

1. 1] Arithmetic Operators:

   • Addition (+)
   • Subtraction (-)
   • Multiplication (*)
   • Division (/)
   • Modulus (%)
   • Exponentiation (**)

2. 2] Assignment Operators:

   • Assignment (=)
   • Addition assignment (+=)
   • Subtraction assignment (-=)
   • Multiplication assignment (*=)
   • Division assignment (/=)
   • Modulus assignment (%=)

3. 3] Comparison Operators:

   • Equal (==)
   • Identical (===)
   • Not equal (!= or <>)
   • Not identical (!==)
   • Greater than (>)
   • Less than (<)
   • Greater than or equal to (>=)
   • Less than or equal to (<=)

4. 4] Logical Operators:

   • AND (&& or and)
   • OR (|| or or)
   • NOT (! or not)
   • XOR (exclusive OR) (xor)

5. 5] Increment/Decrement Operators:

   • Increment (++)
   • Decrement (--)

6. 6] String Operators:

   • Concatenation (.)
   • Concatenation assignment (.=)

7. 7] Array Operators:

   • Union (+)
   • Equality (==)
   • Identity (===)
   • Inequality (!= or <>)
   • Not identical (!==)

8. 8] Ternary Operator:

• Syntax :-
9. (condition) ? expression1 : expression2;

it works:

• 1] If the condition evaluates to true, the expression1 is executed.
• 2] If the condition evaluates to false, the expression2 is executed.

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PHP data Type

 Variable Data Type in PHP

1] PHP String :-

        Represents a sequence of characters.

Example: $name = "seeta";

2] PHP Integer :-

Represents whole numbers without decimal points.

Example :- $number = 100;

3] PHP Float :-

Floating point numbers or Doubles

Represents numbers with decimal points.

Example :- $float_number = 9.7;

4] PHP Boolean :-

Represents true or false values.

Example: true;

5] PHP Array :-

Represents a collection of elements, each identified by a key.

Example: $colors = array("red", "green", "blue");

6] PHP Object :-

Represents instances of user-defined classes.

Example:

class Car { public $color = "blue"; public $make = "Toyota"; } $car = new Car();

7] PHP NULL :-

Represents a variable with no value.

Example: $variable = null;

1. 8] PHP Resource :-
2. Represents a special variable that holds a reference to an external resource.
3.    A common example of using the resource data type is a database call.                         It is the storing of a reference to functions and resources external to PHP.
4. 
   

Variable data type
Example

/* data type  variable */
<?php
$no1=10;
$no2=85.99;
$name1='aman';
$name2="aishwarya";
$status="false";
$student=array("payal","aishwary");


VAR_DUMP($no1);
var_dump($no2);
var_dump($name1);
var_dump($name2);
var_dump($status);
var_dump($student);
?>




variable data type
Output





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PHP variable

1] variables are declared /represent with a dollar sign ($) by the variable name.

2] A variable is a container to store to add values() of

Type :-

1] int

2] float

3] string

4] boolean

5] array

6] object

7] resources etc.

3] Variable names must begin with a letter or underscore character, followed by any combination of letters, numbers, or underscores.

Rules Variable Declaration

1] variable name must start with any Alphabet or symbol , variable name.

2] Can not start with a number.

eg :- $s1 = correct , $1s = wrong

3] PHP variable name are case sensitive .

   EG- $a ,$A, are two different variables.

PHP variable
Program :-

<?php

$no1=10;

$no2=5;

echo $no1+$no2;

?>

PHP variable
Output :-

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PHP introduction

 What is the PHP

  ஃ  It was originally created by Danish-Canadian programmer Rasmus Lerdorf in 1993 and             released in 1995.

1]  PHP stands for Hypertext Preprocessor.

2] It is a widely-used open-source server-side scripting language.

3] primarily designed for web development and can be embedded into HTML.

4] PHP scripts are executed on the server, generating dynamic web page content.

5] PHP code can perform tasks such as collecting form data, interacting with databases,

managing sessions, and creating cookies.

6] It is commonly used alongside MySQL or other database management systems to

create dynamic websites and web applications.

8] php is powerful and flexible language supported by a large community of developers worldwide.

Why php use

1] platform independent

2] open source

3] runs multiple operating system

e.g :- window, linux, kill , dos

4] Free to download and edit.

What can php do ?

1] php can generate dynamic page content.

2] php can create open ,read ,write, delete, and close files on server.

3] collect form data.

4] send data receive cookies.

5] add delete , modify, your database.

6] control user access.

7] php can encrypt data

How to run PHP file

ஃ writing the php code Visual Studdio code, notepad, Eclipse etc..

1] first xampp server download.

2] than select the xampp folder click on htdocs file.

3] htdocs folder click than create your program folder.

ஃ you prrogram save

4] php program must save .php extension.

5] run to the php program xampp control panel click

downloads XAMPP SERVER VISIT LINK

https://www.apachefriends.org/

ஃ Than click Apache Module click start button

ஃ Than click on Admin Button.

5] select folder of you project name.

6] Than select the you program name.

7] Program execute the XAMPP Server.

8] Run to the any browser.(show to the output).

Note :- php file is placed inside the htdocs folder. you want to run. open any web

browser and enter "localhost/demo.php" and press enter. than program is run

Php Syntax :-

<? php

.......

....

...

?>

PHP Program :-

<?php

echo " hi";

?>

<?+php

echo "<marquee>learn php language </marquee>" ;

?>

php Output:-

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