match does strict matching without fallthrough, while switch can group statements and fall through.
What It Does
match does strict matching without fallthrough, while switch can group statements and fall through. The following examples distinguish a normal use case, a boundary case and a practical application.
Requirements and Compatibility
PHP 8.x and a local test environment. Apply input validation, correct error handling and the requirements of any optional libraries.
match uses strict identity, returns an expression and has no fallthrough; switch handles statement blocks and can fall through when break is omitted.
The code focuses on the core concept. Production implementation may also need routes, validation, persistence, authorization or deployment tooling.
Example 1: Basic Behavior
Start with the smallest meaningful working case.
<?php
$state = 'paid';
echo match ($state) { 'new' => 'Awaiting', 'paid' => 'Ship', default => 'Review' };Example 2: Another Case
Examine the edge case and the observable result.
<?php
$role = 'moderator';
switch ($role) { case 'admin': case 'moderator': echo 'Can review'; break; default: echo 'Read only'; }Practical Example: Putting It to Use
Apply the technique to a small practical task.
<?php
$quantity = 5;
echo match (true) { $quantity === 0 => 'none', $quantity < 5 => 'few', default => 'many' };Important Behavior and Edge Cases
Switch cases historically use loose comparison; adding breaks is easy to forget.
Comparison with Related Functions or Approaches
| Option | What it means in practice |
|---|---|
| Match Expressions vs Switch Statements | match does strict matching without fallthrough, while switch can group statements and fall through. |
| Related approach | Use match for a value result and switch for more complex statement-driven branches. |
Common Beginner Mistakes
| Mistake | Correct approach |
|---|---|
| Ignoring the important boundary for Match Expressions vs Switch Statements | Switch cases historically use loose comparison; adding breaks is easy to forget. |
| Assuming a related mechanism has the same behavior | Use match for a value result and switch for more complex statement-driven branches. |
Key Takeaways
- match does strict matching without fallthrough, while switch can group statements and fall through.
- Switch cases historically use loose comparison; adding breaks is easy to forget.
- Use match for a value result and switch for more complex statement-driven branches.
Before adapting these examples, verify the return values, test the failure paths and confirm that your application meets its security and environment requirements.