PHP.pptx is the Best Explanation of ppts

PHP
Server Side Scripting Language

Introduction Of PHP
 PHP is a recursive acronym for "PHP: Hypertext Preprocessor“ or “Personal
Home Page”.
 PHP is a server side scripting language that is embedded in HTML. It is used to
manage dynamic content, databases, session tracking, even build entire e-
commerce sites.
 It is integrated with a number of popular databases, including MySQL,
PostgreSQL, Oracle, blockchain, and Microsoft SQL Server.

Common use Of PHP
 PHP performs system functions, i.e. from files on a system it can create,
open, read, write, and close them.
 PHP can handle forms, i.e. gather data from files, save data to a file,
through email you can send data, return data to the user.
 You add, delete, modify elements within your database through PHP.
 Using PHP, you can restrict users to access some pages of your website.
 It can encrypt data.

Feature And Advantages of PHP
 Simple
 Interpreted
 Faster
 Open Source
 Platform Independent
 Efficiency
 Flexibility

What Can PHP Do?
 PHP can generate dynamic page content
 PHP can create, open, read, write, delete, and close files on the server
 PHP can collect form data
 PHP can send and receive cookies
 PHP can add, delete, modify data in your database
 PHP can be used to control user-access
 PHP can encrypt data

Why PHP?
 PHP runs on various platforms (Windows, Linux, Unix, Mac OS X, etc.)
 PHP is compatible with almost all servers used today (Apache)
 PHP supports a wide range of databases
 PHP is free PHP is easy to learn and runs efficiently on the server side

PHP Syntax
 A PHP Script is always executed at server side ,and browser gets the plain HTML
result in response.
 The Location of PHP Script can be anywhere in document in the document.
 The PHP Parsing engine requires a method to distinguish PHP code from other
script in the page. This is called escaping to PHP.
 The PHP Script start with <?php and ends with ?>

Syntax
<?php
PHP Statement;
?>

Extension Of PHP
 . Php is the extension for PHP Files.
 A PHP is Combination of PHP script with HTML Tags.

Simple Program to display Hello Message in PHP
 <?php
echo "<h2>PHP is Fun!</h2>";
echo "Hello world!<br>";
echo "I'm about to learn PHP!<br>";
echo "This ", "string ", "was ", "made ", "with multiple parameters.";
?>
The echo statement can be used with or without parentheses: echo or echo().

PHP Comments
<?php
// This is a single-line comment
# This is also a single-line comment
/*
This is a multiple-lines comment block
that spans over multiple
lines
*/
// You can also use comments to leave out parts of a code line
$x = 5 /* + 15 */ + 5;
echo $x;
?>

Variables in PHP
 Definition: A Variable is the Name Given to memory Location where we can
store some Value . The Value depends upon the data type of the variable.
 Declaration: In PHP we declare Variables by using “$ “ symbol without
assigning the data type. The Data type of variable is decided by the PHP
parsing engine when value is assigned to it.

Example of Variable Declaration
<?php
$txt = "Hello world!";
$x = 5;
$y = 10.5;
echo $txt;
echo "<br>";
echo $x;
echo "<br>";
echo $y;
?>

Addition Of two Numbers
<?php
$no1=12;
$no2=19;
$sum=$no1+$no2;
echo"Summation is:-".$sum;
?>

Conditions and Loops
Control Structure
If
If else
While
Do While
Else If ladder
Switch case
For
For each

Function
 The Concept Of Programing is Same of any other Programming Language.
 Definition: A function is a block of statements related to such a task which
we want to execute repeatedly in our program.
 A function can take arguments and also can return value.
 Up till now we have seen the function echo().
 This is built in function of php.
 Now We will create our own user defined function.
 Related to functions there are two important points:
 1Creating a PHP Function.
 2. Calling a PHP Function

Function Syntax
function function_name (parameters)
{
Statements;
}

Sample Program of function
<?php
function printmsg()
{
echo "hello welcome";
}
printmsg();
?>

Passing Arguments Through Function
<?php
function summation($n1,$n2)
{
$n3=$n1+$n2;
echo "Summation is:-".$n3;
}
summation(10,20);
?>

Passing Argument by Reference
<?php
function summation(&$num)
{
$num += 5;
}
$num=10;
echo "$num<br>";
summation($num);
echo "$num“;
?>

Form Handling
 When you login into a website or into your mail box, you are interacting
with a form.
 Forms are used to get input from the user and submit it to the web server for
processing.
 A form is an HTML tag that contains graphical user interface items such as
input box, check boxes radio buttons etc.
 The diagram below illustrates the form handling process.

PHP.pptx is the Best Explanation of ppts

PHP.pptx is the Best Explanation of ppts

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