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When we talk about php we should know where we use the php and what is the purpose of it.
The php we use mainly for the connecting of the front-end with the back-end.
What is front-end?:
Front-end is nothing but the view of the website. For example the front-end is developed using the technologies like HTML,CSS,JQUERY,JAVASCRIPT,etc,.
what is back-end?
Back-end is the programming language that we use to store the data base that we need to access or display in the front-end. BUT this is not possible display the back-end data in the front-end without a mediator. For this we use the programming language that we need.
Here our back-end programming language is the php.
This is also known as server-side scripting language.
Now let's learn both the front-end and the back-end in a single tutorial for the complete beginners.
HTML
The Basic Of Web
•Hyper Text Markup Language
• Text file containing small mark up tags.
• Must have an extension .htm or .html.
note-:but wen we use php then we don't need to use the .html
Basic Structure
<html>
<head>
<title> title of the page that displays in the browser tab</title>
</head>
<body>
body contents can be written here
<b>…….</b> to
display the text in bold.
<i>……..</i> to display the
text in italic font.
<tt>……</tt> teletype element displays the
content in type writer font.
<strike>…</strike> draws a line through the middle of the text.
<big>……</big>
larger font size to display the text.
<small>…..</small> displays the text in a smaller font size.
<sub>…….</sub>
subscript elements.
<sup>…….</sup> superscript elements.
<div>……..</div> div stands for division
<img src=“filename.jpg”
alt=“cannot display”/> for images
<a
href=“filename.php”>click to
go</a> too add any link
<button>submit</button> any button that you want to use.
</body>
</html>
CSS
CASCADING STYLE SHEETS
This is to add more beautiness to the page like doing make-ups for your face
while going on to a function.
THERE ARE 3 TYPES
OF CSS
Inline style sheet(Inside an HTML element)
[Giving style to any particular tag].
<p
style=“color:blue;margin-left:20px”>This is a paragraph</p>
Internal style sheet(Inside the head section of an HTML
)
[Defining
the styles in the head section of an HTML page]
<head>
<style type=“text/css”>
h1 {
color:red;
}
p
{
margin-left:20px;
}
</style>
<./head>
External style sheet(In an external css file.)[to create style on separate page and just linking the file in head of the current page]
<head><link rel=“stylesheet” type=“text/css” href=“one.css”/>
one.css //external file
h1{color:red;}
p{margin-left:20px}
To leran more about the css do visit the w3school for beginners
https://www.w3schools.com/css/default.asp
JAVASCRIPT
NOTHING RELATED TO “JAVA”
Javascript is a sequence of statements to
be executed by the browser.
Javascript is case sensitive.
Javascript statements
document.write(“hello”);//semicolon
is
optional.
Example
to use javascript to write text on a web page
u<html>
u<body>
u<script type=“text/javascript”>
udocument.write(“hello world”);
u</script>
u</body>
u</html>
to leran more about the javascript do visit w3school
PHP
¡PHP is a server-side
scripting language, mainly used for web development but also used as a
general-purpose programming language. Object-Oriented Programming (PHP OOP),
is a type of programming language principle added to php5, that helps in
building complex, reusable web applications.
Characteristics of
PHP
uFamiliarity.
u
u Simplicity.
u
u Efficiency.
u
u Security.
u PHP is an acronym
for "PHP: Hypertext Preprocessor"
u
u PHP is a
widely-used, open source scripting language
u
u PHP scripts are
executed on the server
u
u PHP is no case
sensitive.
u
u PHP files have
extension ".php"
Differentiate PHP
code
uDefault tags.
<?php print “welcome to
the world of PHP;”?>
Most commonly used
uShort tags.
<? print
“Welcome to the world of PHP!”;?>
Less Used.
u
uScript tags.
<script
language="php">
$print = print
("hello");
</script>
Variable
declaration in PHP
u A
variable starts with the $ sign, followed
by the name of the variable
u A variable name must
start with a letter or the underscore character
u A variable name
cannot start with a number
u A variable name can only contain
alpha-numeric characters and underscores
(A-z, 0-9, and _ )
u Variable names are
case-sensitive ($age and $AGE are two different variables)
Datatypes
u String
u Integer
u Float (floating
point numbers - also called double)
u Boolean
u Array
u Object
u NULL
<?php
$x = 5985;
var dump($x);
?>
Echo and print
u In
PHP there are two basic ways to get output: echo and print.
u echo and print are more
or less the same.
u echo has no return value
while print has a return value of 1 so it can be used in expressions.
u echo can take multiple
parameters (although such usage is rare) while print can take one
argument.
u echo is marginally
faster than print.
u The echo statement can be used with or
without parentheses: echo or echo()
u example
<?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.";
?>
u The print statement can be used with or
without parentheses: print or print()
uExample
<?php
print
"<h2>PHP is
Fun!</h2>";
print
"Hello world!<br>";
print
"I'm about to learn
PHP!";
?>
Functions
uA function is a section of code with a
specific purpose that assigned a unique
name.
u A function is a block of statements that
can be used repeatedly in a program.
u A function will not
execute immediately when a page loads.
u
u A function will be
executed by a call to the function.
function functionName()
{
code to be executed;
}
<?php
function writeMsg()
{
echo "Hello
world!";
}
writeMsg(); // call the function
?>
So in php there are various things to learn. I don't stop it here. Actually this post i have added to let know the beginners what is there in web-development.
4 comments:
Thank u for the very good initiative to make us understand those topics very easily.
Thank you Sujin for your wonderful review..
It is very easy to learn thank you
Hai my friend, it is really great to easily caughtup as beginner, also even the way of explanation is help to go on learning mindset and would have used come back to learn if the person who have laziness mind
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