PHP if...else...elseif Statements

In PHP we have the following conditional statements:

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

PHP - The if Statement
The if statement is used to execute some code only if a specified condition is true.

Syntax

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

The example below will output "Have a good day!" if the current time (HOUR) is less than 20:

Example

<?php
$text = 'Something';
if($text=='Something else'){
echo 'TRUE';
}else{
echo 'FALSE';
}
Output:
FALSE

PHP - The if...else if Statement

Use the if....else statement to execute some code if a condition is true and another code if the condition is false.

Syntax

if (condition) {
  code to be executed if condition is true;
} else {
  code to be executed if condition is false;
}

The example below will output "Have a good day!" if the current time is less than 20, and "Have a good night!" otherwise:

Example

<?php
$number = 11;
if($number==10){
 echo 'Equal to 10';
}else if ($number==11){
 echo 'Equal to 11';
}else{
 echo 'Not equal';
}
?>

Output:Equal to 11