PHP elseif

Introduction

elseif is a control structure in PHP that is used to test multiple conditions and execute different code blocks based on the result of the tests. It is used in conjunction with the if statement and the else statement.

The elseif keyword can be used several times in a row to create a chain of tests. The elseif statement is evaluated only if all previous if and elseif statements are false.

Syntax

The syntax for the elseif statement is:

if (condition1) {
   // code to be executed if condition1 is true
} elseif (condition2) {
   // code to be executed if condition1 is false and condition2 is true
} elseif (condition3) {
   // code to be executed if condition1 and condition2 are false and condition3 is true
} else {
   // code to be executed if all conditions are false
}

Example

Here is an example that demonstrates the use of elseif:

<?php
$score = 75;

if ($score >= 90) {
   echo "You got an A!";
} elseif ($score >= 80) {
   echo "You got a B!";
} elseif ($score >= 70) {
   echo "You got a C!";
} elseif ($score >= 60) {
   echo "You got a D!";
} else {
   echo "You got an F!";
}
?>

In this example, the value of the variable $score is tested against different ranges of numbers, and a different message is printed depending on the score.

Conclusion

The elseif statement is a powerful control structure in PHP that allows you to test multiple conditions and execute different code blocks depending on the test results. It is an essential tool in programming, and it can help you create more complex and versatile programs.