PHP Conditional Statements

you want to perform different actions for different decisions. You can use conditional statements .

The php conditional statement are :

• if statement -  It is used to execute an instruction or Block of instructions only if a condition is fulfilled.
• if...else statement - is used when a different sequence of intructions is to be executed depending on the logical value ( True / False ) of the condition evauated.
• if...elseif....else statement (Nested if...else statement) - selects one of several blocks of code to be executed.
• switch statement - selects one of many blocks of code to be executed.

Syntax - 

PHP - The if Statement

if (condition)

  {

  code to be executed if condition is true;

  }

PHP - The if...else Statement

if (condition)

 {

                code to be executed if condition is true;

 }

else

 {

                code to be executed if condition is false;

 }

PHP - The if...elseif....else Statement

if (condition)

  {

                code to be executed if condition is true;

  }

elseif (condition)

  {

  code to be executed if condition is true;

 }

else

  {

              code to be executed if condition is false;

 }

PHP - The switch Statement

switch (n)

{

case label1:

                 code to be executed if n=label1;

  break;

case label2:

                code to be executed if n=label2;

  break;.

default:

               code to be executed if n is different from all labels;

}