1. Else executes the following block of statements if the condition in the corresponding if is false.
2. After the else, if another condition is to be checked, then an if statement follows the else. This is else if and is called as if else ladder.

if (condition)
{
Execute statement(s) if condition is true;
}

Switch statements work the same as if statements but they can check for multiple values at a time

The If Statement is a way to make decisions based upon the result of a condition.

It performs different actions for different decisions in programing language

switch (n)
{
case label 1:
code to be executed if n=labeI1;
break;
case label 2:
code to be executed if n=labeI2;
break;
case label 3:
code to be executed if n=labeI3;
break;
...
default:
code to be executed if n is different from all labels;
}

(i) It is used to perform different action based on different conditions.
(ii) It works the same as if statement and it can check for multiple values at a time.

If-elseif-else statement is a combination of if-else statement. Multiple conditions can be checked and action is based on the result of the condition.

Syntax:
if (condition)
{
        //True-block;
}
else
{
        //False-block;
}

Conditional statements are implemented by the following types
(i) if statement
(ii) if...else statement
(iii) if...else if... else statement
(iv) switch statement.

The if ... else statement is a conditional statement in PHP. It executes one block of code if a condition is true and another block of code if the condition is false.

Syntax:
if (condition)
{
  //code to be executed if condition is true;
}

There are several types of conditional statements in PHP. They are
1. 'if' statement
2. 'if...else' statement
3. 'if...elseif...else' statement
4. 'switch' statement