PHP if else else if Statements

conditional statements are used to perform different tasks bassed in different Conditions.

Conditional Statements:-

when you write code, you want to perform different actions for different conditions. You can use conditional statements in your code to do this.

conditional statements:-

• if statement - executes some code if one condition is true
• if else statement - executes some code if a condition is true and another code if that condition is false
• if else if else statement - executes different codes for more than two conditions
• switch statement - selects one of many blocks of code to be executed

Now we will discuss These statements in details 

if Statement:-

if statement executes if one condition is true.

Syntax:-

if (condition) {
    Statement;
}

The example below will output "Have a Good Day" if the current time (HOUR) is less than 20:-

<?php
$t = date("S");

if ($t < "20") {
    echo "Have a Good Day";
}
?>

if  else Statement:-

The if  else statement executes some code if a condition is true and another code if that condition is false.

Syntax;-

if (condition) {
    statement if condition is true;
} else {
    statement if condition is false;}

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

<?php
$t = date("S");

if ($t < "20") {
    echo "Have a good day!";
} else {
    echo "Have a good night!";
}
?>

if else if else Statement:-

The if  else if  else statement executes different codes for more than two conditions.

Syntax:-

if (condition) {
    code to be executed if this condition is true;} elseif (condition) {
    code to be executed if this condition is true;} else {
    code to be executed if all conditions are false;}

The example below will output "Have a good morning!" if the current time is less than 10, and "Have a good day!" if the current time is less than 20. Otherwise it will output "Have a good night!":-

<?php
$t = date("H");

if ($t < "10") {
    echo "Have a good morning!";
} elseif ($t < "20") {
    echo "Have a good day!";
} else {
    echo "Have a good night!";
}
?>