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PHP Syntax and Echo or Print


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PHP Syntax and Echo and Print   

How to Write PHP Code?

A PHP script starts with <?php and ends with ?>.

It can be placed anywhere in the program.

First we will start with a simple PHP code to print “This is my first PHP program”.

The extension of the file is given as .php.

<html>

<body>

<?php echo “This is my first PHP program.”?>

</body>

</html>

 

Result: This is my first PHP program.

 

Note: echo is used to give the output.

Comments in PHP

A comment is the portion of aprogration which only meant for human reader.Its only purpose is to read by someone who is looking to your program.

Comments can be used to:

§  Let others understand what you are doing

§  Remind yourself what you did.

<?php

# This is single line cmment

// This is also single line comment

/* This is multi lines comment

Author:XYZ

Purpose:Multi lines Comment*/

?>

PHP is Case sensitive

Yes PHP is case sensitive. Try Out yourself:

<?php

$text=50;

print(“Variable capital is $text<br>”);

print(“Variable capital is $Text<br>”);

?>

 

Result:

Variable capital is 50

Variable capital is

 

Echo/Print

In PHP echo and print both are used to display output.Both of them more or less are same.

The main difference between echo and print is that:

Echo does not return any value but print return value 1 in expression. Let’s see some examples:

Display text using echo:

 

 

<?php

echo "Hello world!";

?>

 

Output:

“Hello world”

 

Display Variable using echo

<?php

$a= 5;

$b=4;

echo $a+ $b;

?>

 

Output:

9

Display text using print:

<?php

print "Hello world!<br>";

?>

 

Output:

“Hello world”

 

Display Variable using print:

<?php

$a= 5;

$b=4;

print  $a+ $b;

?>

 

Output:

9


useful information

By Manoj Bhatt on   12 days ago
Really very useful and fantastic way to illustrate ..!
Thanks

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