Practical Web Data Patterns

Route Matches

Match a path to a handler label.

route-match A small router maps a path to a handler. The lesson uses fixed path strings instead of a live server request.

Route Matches

path
route_match.php
Replay: real traced execution (multi-file project)
<?php
$path = "/users";
$handler = "not_found";

if ($path === "/users") {
    $handler = "users_index";
} elseif ($path === "/health") {
    $handler = "health_check";
}

echo "path=" . $path . "\n";
echo "handler=" . $handler . "\n";

<?php
$path = "/health";
$handler = "not_found";

if ($path === "/users") {
    $handler = "users_index";
} elseif ($path === "/health") {
    $handler = "health_check";
}

echo "path=" . $path . "\n";
echo "handler=" . $handler . "\n";

<?php
$path = "/missing";
$handler = "not_found";

if ($path === "/users") {
    $handler = "users_index";
} elseif ($path === "/health") {
    $handler = "health_check";
}

echo "path=" . $path . "\n";
echo "handler=" . $handler . "\n";

  1. $path ← /users, $handler ← not_found

    1<?php2$path→ /users = "/users"; //@path="/health", "/missing"3$handler→ not_found = "not_found";

  2. $handler ← users_index

    5if ($path/users === "/users") {6    $handler→ users_index = "users_index";7} elseif ($path === "/health") {

  3. echo "path=" . $path . " ";

    11echo "path=" . $path/users . "\n";12echo "handler=" . $handlerusers_index . "\n";
    outputpath=/users
handler=users_index

  1. $path ← /health, $handler ← not_found

    1<?php2$path→ /health = "/health";3$handler→ not_found = "not_found";45if ($path === "/users") {6    $handler = "users_index";7} elseif ($path === "/health") {8    $handler→ health_check = "health_check";9}1011echo "path=" . $path/health . "\n";12echo "handler=" . $handlerhealth_check . "\n";
    outputpath=/health
handler=health_check

  1. $path ← /missing, $handler ← not_found

    1<?php2$path→ /missing = "/missing";3$handler→ not_found = "not_found";45if ($path === "/users") {6    $handler = "users_index";7} elseif ($path === "/health") {8    $handler = "health_check";9}1011echo "path=" . $path/missing . "\n";12echo "handler=" . $handlernot_found . "\n";
    outputpath=/missing
handler=not_found