Different Between Double Quote & Single Quote

Different Between Double Quote & Single Quote :-

echo Function into Single Quote  into the print value of Variables And it is not possible into the Double Quote.

Syntax :-

<?php 

     echo '$variable_name';

     echo "$variable_name";

?>

• Above Syntax into the Second Statement Into Generate the Error because the double quote into not print the value of variable.

Example :-

<?php 

     $a=555;

     echo 'Value of the Variable $a';

     echo "Value of the Variable $a";

?>

Concatation in Php

Concatation in Php :-

You have Concatation in php Using the Dot(.) Sign.

Syntax :-

      echo "String Message".$Variable_name;

• Above Syntax into Display the Concatation between String and Variable .

Example :-

<?php

      $a=66;

      echo "Value of the A Variable : ".$a;

?>

How to Create a Variable in Php and Print

How to Create a Variable in Php :-

You have Create a Variable in Php Using the "$" Sign.

Rules of Variables is Following Listout.

1. Variable Name Must be Start with a letter (a,b,c........) or underscore (_).
2. Variable Name Length is Maximum 32 Character.
3. Variable Name is the Case Sensitive.
4. Variable Name into Contain the Alpha-Numeric Character and Underscore.

Syntax of Create Variable :-

        $Variable_name=Value;

Example 1 :-

<?php

      $a=3;

      echo $a;

?>

Example 2 :-

<?php

      $a=3;

      $b=5

      echo $a+$b;

?>

Print Hello World in Php

Print Hello in Php :-

Print Hello World Using the echo Function in Php.

Syntax of echo Function :-

         echo "String Message";

Example :

<?php

          echo "Hello World";

?>

Introduction Of PHP

Introduction :-

• Php Old Name is the Personal Home Page.
• Php New Name is the Hypertext Pre-Processor.
• Php is Developed By Rasmus Lerdorf in 1994.
• Php is the Server-Side Scripting Language.
• Php Through You have create Dynamic Webpage.
• Php Run on the Apache Web Server Like wamp,xampp etc...
• Php Support many Database Like as Mysql,MSsql server etc...

Syntax Of Php :-

Old Syntax

<?......

.........

.........

?>

New Syntax

<?php....

.............

............

?>