Variable in php

Variables in PHP

Variables are used  for store different type of values, like text , numbers.
When a variable is declared, it can be used again anywhere in your script.
All variables in PHP start with a $ sign symbol.
Example for declaring php variable
$variable_name=value;
Php is loosly typed language a php variable can store all type of value it does not need to specify one type of variable.

 Rules for declaring variables:

             Rules for naming php variable is jst like c++ variable.

·         A variable must be start with letter or underscore(_).

·         It not includes the space.

String Variables in PHP:

  For strings In php we simply declare a variable as show above and assign it string value in double quotes.

For example:

 <?php

$text=”hello umer”;

echo $text;

?>

We use the echo for print the value in php.

Concatenate strings:

                     For concatenate different strings with each other we use dot (.) operator in php .

For examples:

 <?php

$text=”hello umer”;

$text_2=”h r u?”;

$text_3=$text. $text_2;

 echo $text_3;

?>

Output:

          Hello umer h r u?