2. Echo PHP Function, PHP Variables, If and Switch Statements

Echo Function :

• The echo() function outputs one or more strings.
• Syntax: echo(strings);
• Ex. echo "Hello World!";

http://pastebin.com/b9xc54uc

Variables in PHP :

• Variables are used for storing values, like text strings, numbers or arrays.
• When a variable is declared, it can be used over and over again in your script.
• All variables in PHP start with a $ sign symbol.
• The correct way of declaring a variable in PHP: $var_name = value;

http://pastebin.com/aBkwyB4K

 If Statement :

• if statement - use this statement to execute some code only if a specified condition is true.
• if...else statement - use this statement to execute some code if a condition is true and another code if the condition is false.
• if...elseif....else statement - use this statement to select one of several blocks of code to be executed.

http://pastebin.com/WQMGVtjz

Switch Statement :

• switch statement - use this statement to select one of many blocks of code to be executed

http://pastebin.com/mGngHSsq