Switch-Case Example in PHP: Handling Multiple Cases Together

Switch-Case Example in PHP: Handling Multiple Cases Together

This PHP example demonstrates how to use the switch statement to handle multiple conditions for a variable. It shows how different case labels can be grouped to execute the same block of code, which is useful when multiple values require the same output or logic. Specifically, the code checks the value of $i and:

• Outputs a common message for values 0, 1, or 2
• Outputs a separate message when $i is 3
• Does nothing if $i doesn’t match any case

The break statement is used to prevent fall-through to other cases after a match is found.

<?php
switch ($i) {
    case 0:
    case 1:
    case 2:
        echo "i is less than 3 but not negative";
        break;
    case 3:
        echo "i is 3";
}
?>

Explanation:

• switch ($i) checks the value of the variable $i and matches it against the cases provided.

• case 0:, case 1:, and case 2: are grouped together without a break between them, which means if $i is 0, 1, or 2, it will execute the same block of code.

  • It will print: i is less than 3 but not negative
• The break; statement stops the switch-case execution after matching case 0/1/2.
• case 3: is a separate case that will print i is 3 if $i == 3.

Example Outputs:

• If $i = 1, output will be: i is less than 3 but not negative
• If $i = 3, output will be: i is 3
• If $i = 5, there is no matching case, so it will output nothing