What is PHP and PHP Variables?

A)—>PHP is used to develop Web Applications.—>It is open source scripting language.—>PHP is an object-oriented language. PHP Variables ————- —>A variable is a temporary storage that is used to store data temporarily.—>In PHP, a variable is declared using $ sign followed by variable name.

       $str="hello string";  
       echo "string is: $str <br/>";  
       echo "integer is: $x <br/>";  
       echo "float is: $y <br/>";