PHP Tutorial for Beginners

PHP FRONT TO BACK

What is PHP?
:- PHP: Hypertext Preprocessor(Recursive Acronym)
Server-Side Programming/Scripting Language
Can be embedded directly within HTML (<?php?>)
Files use a “.php” file extension

How Does PHP Work?
:- Client makes a request
Server runs PHP/extensions
Query database if needed
Load other files if needed
Result is sent back to client

Why Use PHP?
:- Easy To Learn Freedom
Free & Open Source Frameworks
Great support Database Compatibility
Cross-Platform

What Can PHP do?
:- Create dynamic page content Interact with databases
Interact with files on the server Access control
Collect & process forms Encrypt data
Send/ receive cookies Almost anything else

What Can You Build With PHP?
:- Basic Websites Content Management Systems
Blog Type Websites Membership Websites
Shopping Carts Search Engines
Social Networks Backend APIs

*** Install XAMPP Apache+MariaDB+PHP+Perl)(Latest version 7.1.1)
What is XAMPP?
:- XAMPP is the most popular PHP development environment

• Install XAMPP his after open It and start Apache and MySQL go browser and search –
  https://loclalhost (here uses only htdocxs file your xampp file)

Variables
:- Prefix $
Start with a letter or an underscore
only letter, numbers and underscores
Case sensitive

Data types
:- String (ex- 12, 0, -34 etc.)
Integers (ex- 25.2654, 2.12, 41.54 etc.)
floats
Booleans (ex- true/false)
Arrays (ex- multiple values in one single variable)
Objects (ex- hold programming objects)
Null (ex- hold only one value- NULL)
Resource (ex- special variable that hold references to resources external to PHP)

• some Data type class
  • $Output = ‘………’; (………= You can use any word which you shown in desktop )
  • $num1 = 4; ()
  • $num2 = 10;
  • $sum = #num1 + $num2;
  • $strings1 = ‘…….’;
  • $strings2 = ‘…….’;
  • $greeting = string1. ”. $strings.’!’;
  • $greeting2 = “$string1 $string2”;
  • $string3 = ‘They\’re Here”;
    :- define(‘GREETING’, ‘Hello Everyone’, true);
    :- echo greeting;
• Array– basically variable that holds multiple values these are three types:-
  1) Indexed
  2) Associative
  3) Multi-dimensional

** 1)Indexed
some Indexed class
– $people = array(‘……..’, ‘………’, ‘……..’;
:- echo $people[3];

** 2) Associative arrays
– $people = array(‘…….’=> 35, ‘……..’=> 32, ‘……..’ => 27);
:- $ids = [22 => ‘…….’ ];
:- echo $ [‘……’];

** 3) Multi Dimensional
$cars = array(
array(‘Honda’, 20, 10),
array (‘Toyota’, 30, 20),
array (‘Ford’, 23, 12),
);
echo $cars[1][2]

Some Important Rational Operators-

==  equal to    5==2            false
!=  not equal to    5!=2        true
=== identical   $a===$b         True if $a is equal to $b
                                and they are of the same
<>  not euqal   $a <> $b        true if $a is not euqal to 
                                $b, or they are not of the same 
<=> spaceship   $a <=> $b       it returns -1, 0 or 1 when $a is 
                                respectivelt less than, equal to, or 
                                 greater than $bCode language: PHP (php)

Rajesh Kumar

I’m Rajesh Kumar, a DevOps, SRE, DevSecOps, Cloud, and Platform Engineering expert passionate about sharing practical knowledge, real-world experiences, and industry best practices. I have worked at Cotocus and regularly write about technology, travel, investing, health, product reviews, and digital marketing through my various platforms.

I publish technical articles at DevOps School, travel stories at Holiday Landmark, stock market insights at Stocks Mantra, health and fitness guidance at My Medic Plus, product reviews at TrueReviewNow, and SEO and digital marketing strategies at Wizbrand.