How to use Switch Case Expression in PHP?

[super soaker]

Hi friends,
I am recently started doing coding with the PHP programming language. So you can consider me as a newbie. I have done some basic loops in PHP, and now I want to use the Switch Case. So please tell me how to use Switch Case Expression in PHP? If possible, please provide me the sample of coding so that it would be better for me to understand the use of Switch Case.

[MELTRONICS]

I think that you should know about the Switch first. Later on you will feel easy to understand the Switch Case Expressions. The switch statement is equivalent to a series of if statements. On many occasions you will need to compare the same variable (or expression) with many different values, and execute different parts of code depending on which value it equals. This is exactly why is the switch statement. You should keep in mind that unlike other languages, the continue applies to switch and acts similar to break. If you have a switch inside a loop, and want to continue to the next iteration the outer loop, you must use continue 2.

[Allan.d]

The following is an example of the switch structure, hope that it helps you to understand the necessary things :

<?php
if ($i == 0) {
    echo "i equals 0";
} elseif ($i == 1) {
    echo "i equals 1";
} elseif ($i == 2) {
    echo "i equals 2";
}
 
switch ($i) {
    case 0:
        echo "i equals 0";
        break;
    case 1:
        echo "i equals 1";
        break;
    case 2:
        echo "i equals 2";
        break;
}
?>

[MindSpace]

It is important to understand that the switch statement executes each of the clauses in order. The switch statement executes line by line. At first, no code is executed. Only when a box is checked, then PHP executes instructions. PHP continues to execute instructions until the end of the block of the switch, or when it sees a break statement. If you do can not use the break statement at the end of the case statement, PHP will continue to execute all instructions that follow. In a switch, a condition is evaluated only once, and the result is compared to each box. In an elseif statement, the conditions are evaluated in each comparison.

[kelfro]

According to me the Switch Case is easy to understand. In a switch, a condition is evaluated only once, and the result is compared to each box. In an elseif statement, the conditions are evaluated in each comparison. If your condition is more complicated than a simple comparison, or is part of a loop switch is faster. A special case is the default. This case is used when all other cases have failed. For example :

<?php
switch ($i) {
    case 0:
        echo "i equals 0";
        break;
    case 1:
        echo "i equals 1";
        break;
    case 2:
        echo "i equals 2";
        break;
    default:
       echo "i is not equal to 0, 1 or 2";
}
?>

[Katty]

You can also use a semicolon instead of a colon after a case. The following example explains the same :

<?php
switch($fruits)
{
    case 'apple';
    case 'mango';
    case 'pineapple';
        echo 'Good choice';
    break;
    default;
        echo 'Please make a new selection...';
    break;
}
?>