{"id":6439,"date":"2019-09-10T08:34:00","date_gmt":"2019-09-10T08:34:00","guid":{"rendered":"https:\/\/www.devopsschool.com\/blog\/?p=6439"},"modified":"2022-05-08T12:07:23","modified_gmt":"2022-05-08T12:07:23","slug":"php-tutorial-for-beginners","status":"publish","type":"post","link":"https:\/\/www.devopsschool.com\/blog\/php-tutorial-for-beginners\/","title":{"rendered":"PHP Tutorial for Beginners"},"content":{"rendered":"\n

PHP FRONT TO BACK<\/em><\/strong><\/h2>\n\n\n\n

What is PHP?
:-<\/strong> PHP: Hypertext Preprocessor(Recursive Acronym)
Server-Side Programming\/Scripting Language
Can be embedded directly within HTML (<?php?><\/strong>)
Files use a \u201c.php<\/strong>\u201d file extension<\/p>\n\n\n\n

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

Why Use PHP?<\/strong>
:- Easy To Learn Freedom
Free & Open Source Frameworks
Great support Database Compatibility
Cross-Platform<\/p>\n\n\n\n

What Can PHP do?<\/strong>
:- 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<\/p>\n\n\n\n

What Can You Build With PHP?<\/strong>
:- Basic Websites Content Management Systems
Blog Type Websites Membership Websites
Shopping Carts Search Engines
Social Networks Backend APIs<\/p>\n\n\n\n

*** Install XAMPP Apache+MariaDB+PHP+Perl)(Latest version 7.1.1)<\/strong>
What is XAMPP?<\/strong>
:- XAMPP is the most popular PHP development environment<\/p>\n\n\n\n

  • Install XAMPP his after open It and start Apache and MySQL go browser and search \u2013
    https:\/\/loclalhost<\/strong> (here uses only htdocxs file your xampp file)<\/li><\/ul>\n\n\n\n

    Variables<\/strong>
    :- Prefix $
    Start with a letter or an underscore
    only letter, numbers and underscores
    Case sensitive<\/p>\n\n\n\n

    Data types<\/strong>
    :- 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)<\/p>\n\n\n\n

    • some Data type class<\/strong>
      • $Output = \u2018\u2026\u2026\u2026\u2019; (\u2026\u2026\u2026= You can use any word which you shown in desktop )<\/li>
      • $num1 = 4; ()<\/li>
      • $num2 = 10;<\/li>
      • $sum = #num1 + $num2;<\/li>
      • $strings1 = \u2018\u2026\u2026.\u2019;<\/li>
      • $strings2 = \u2018\u2026\u2026.\u2019;<\/li>
      • $greeting = string1. \u201d. $strings.\u2019!\u2019;<\/li>
      • $greeting2 = \u201c$string1 $string2\u201d;<\/li>
      • $string3 = \u2018They\\\u2019re Here\u201d;
        :- define(\u2018GREETING\u2019, \u2018Hello Everyone\u2019, true);
        :- echo greeting;<\/li><\/ul><\/li>
      • Array<\/strong>– basically variable that holds multiple values these are three types:-
        1) Indexed
        2) Associative
        3) Multi-dimensional<\/li><\/ul>\n\n\n\n

        ** 1)Indexed<\/strong>
        some Indexed class
        \u2013 $people = array(\u2018\u2026\u2026..\u2019, \u2018\u2026\u2026\u2026\u2019, \u2018\u2026\u2026..\u2019;
        :- echo $people[3];<\/p>\n\n\n\n

        123456<\/td>- $ids = array (23, 55, 12);<\/code>:- echo $ids[2];<\/code> - $cars= ['honda', 'Toyota', 'Ford';]<\/code>:- $cars[3]= 'Chevy';<\/code>:- echo $ids[3];<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

        ** 2) Associative arrays<\/strong>
        \u2013 $people = array(\u2018\u2026\u2026.\u2019=> 35, \u2018\u2026\u2026..\u2019=> 32, \u2018\u2026\u2026..\u2019 => 27);
        :- $ids = [22 => \u2018\u2026\u2026.\u2019 ];
        :- echo $ [\u2018\u2026\u2026\u2019];<\/p>\n\n\n\n

        ** 3) Multi Dimensional<\/strong>
        $cars = array(
        array(\u2018Honda\u2019, 20, 10),
        array (\u2018Toyota\u2019, 30, 20),
        array (\u2018Ford\u2019, 23, 12),
        );
        echo $cars[1][2]<\/p>\n\n\n\n

        Some Important Rational Operators-<\/p>\n\n\n

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