<commit_before>FastRoute - Fast request router for PHP
=======================================

This library provides a fast implementation of a regular expression based router. [Blog post explaining how the
implementation works and why it is fast.][blog_post]

Install
-------

To install with composer:

```sh
composer require nikic/fast-route
```

Usage
-----

Here's a basic usage example:

```php
<?php

require '/path/to/vendor/autoload.php';

$dispatcher = FastRoute\simpleDispatcher(function(FastRoute\RouteCollector $r) {
    $r->addRoute('GET', '/user/{id:\d+}', 'handler1');
    $r->addRoute('GET', '/user/{id:\d+}/{name}', 'handler2');
    // Or alternatively
    $r->addRoute('GET', '/user/{id:\d+}[/{name}]', 'common_handler');
});

// Fetch method and URI from somewhere
$httpMethod = $_SERVER['REQUEST_METHOD'];
$uri = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);

$routeInfo = $dispatcher->dispatch($httpMethod, $uri);
switch ($routeInfo[0]) {
    case FastRoute\Dispatcher::NOT_FOUND:
        // ... 404 Not Found
        break;
    case FastRoute\Dispatcher::METHOD_NOT_ALLOWED:
        $allowedMethods = $routeInfo[1];
        // ... 405 Method Not Allowed
        break;
    case FastRoute\Dispatcher::FOUND:
        $handler = $routeInfo[1];
        $vars = $routeInfo[2];
        // ... call $handler with $vars
        break;
}
```

### Defining routes

The routes are defined by calling the `FastRoute\simpleDispatcher()` function, which accepts
a callable taking a `FastRoute\RouteCollector` instance. The routes are added by calling
`addRoute()` on the collector instance:

```php
$r->addRoute($method, $routePattern, $handler);
```

The `$method` is an uppercase HTTP method string for which a certain route should match. It
is possible to specify multiple valid methods using an array:

```php
// These two calls
$r->addRoute('GET', '/test', 'handler');
$r->addRoute('POST', '/test', 'handler');
// Are equivalent to this one call
$r->addRoute(['GET', 'POST'], '/test', 'handler');
```

By default the `$routePattern` uses a syntax where `{foo}` specifies a placeholder with name `foo`
and matching the regex `[^/]+`. To adjust the pattern the placeholder matches, you can specify
a custom pattern by writing `{bar:[0-9]+}`. Some examples:

```php
// Matches /user/42, but not /user/xyz
$r->addRoute('GET', '/user/{id:\d+}', 'handler');

// Matches /user/foobar, but not /user/foo/bar
$r->addRoute('GET', '/user/{name}', 'handler');

// Matches /user/foo/bar as well
$r->addRoute('GET', '/user/{name:.+}, 'handler');
```

Custom patterns for route placeholders cannot use capturing groups. For example `{lang:(en|de)}`
is not a valid placeholder, because `()` is a capturing group. Instead you can use either
`{lang:en|de}` or `{lang:(?:en|de)}`.

Furthermore parts of the route enclosed in `[...]` are considered optional, so that `/foo[bar]`
will match both `/foo` and `/foobar`. Optional parts are only supported in a trailing position,
not in the middle of a route.

```php<commit_msg>Fixed syntax error in README example.<commit_after>FastRoute - Fast request router for PHP
=======================================

This library provides a fast implementation of a regular expression based router. [Blog post explaining how the
implementation works and why it is fast.][blog_post]

Install
-------

To install with composer:

```sh
composer require nikic/fast-route
```

Usage
-----

Here's a basic usage example:

```php
<?php

require '/path/to/vendor/autoload.php';

$dispatcher = FastRoute\simpleDispatcher(function(FastRoute\RouteCollector $r) {
    $r->addRoute('GET', '/user/{id:\d+}', 'handler1');
    $r->addRoute('GET', '/user/{id:\d+}/{name}', 'handler2');
    // Or alternatively
    $r->addRoute('GET', '/user/{id:\d+}[/{name}]', 'common_handler');
});

// Fetch method and URI from somewhere
$httpMethod = $_SERVER['REQUEST_METHOD'];
$uri = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);

$routeInfo = $dispatcher->dispatch($httpMethod, $uri);
switch ($routeInfo[0]) {
    case FastRoute\Dispatcher::NOT_FOUND:
        // ... 404 Not Found
        break;
    case FastRoute\Dispatcher::METHOD_NOT_ALLOWED:
        $allowedMethods = $routeInfo[1];
        // ... 405 Method Not Allowed
        break;
    case FastRoute\Dispatcher::FOUND:
        $handler = $routeInfo[1];
        $vars = $routeInfo[2];
        // ... call $handler with $vars
        break;
}
```

### Defining routes

The routes are defined by calling the `FastRoute\simpleDispatcher()` function, which accepts
a callable taking a `FastRoute\RouteCollector` instance. The routes are added by calling
`addRoute()` on the collector instance:

```php
$r->addRoute($method, $routePattern, $handler);
```

The `$method` is an uppercase HTTP method string for which a certain route should match. It
is possible to specify multiple valid methods using an array:

```php
// These two calls
$r->addRoute('GET', '/test', 'handler');
$r->addRoute('POST', '/test', 'handler');
// Are equivalent to this one call
$r->addRoute(['GET', 'POST'], '/test', 'handler');
```

By default the `$routePattern` uses a syntax where `{foo}` specifies a placeholder with name `foo`
and matching the regex `[^/]+`. To adjust the pattern the placeholder matches, you can specify
a custom pattern by writing `{bar:[0-9]+}`. Some examples:

```php
// Matches /user/42, but not /user/xyz
$r->addRoute('GET', '/user/{id:\d+}', 'handler');

// Matches /user/foobar, but not /user/foo/bar
$r->addRoute('GET', '/user/{name}', 'handler');

// Matches /user/foo/bar as well
$r->addRoute('GET', '/user/{name:.+}', 'handler');
```

Custom patterns for route placeholders cannot use capturing groups. For example `{lang:(en|de)}`
is not a valid placeholder, because `()` is a capturing group. Instead you can use either
`{lang:en|de}` or `{lang:(?:en|de)}`.

Furthermore parts of the route enclosed in `[...]` are considered optional, so that `/foo[bar]`
will match both `/foo` and `/foobar`. Optional parts are only supported in a trailing position,
not in the middle of a route.

```php
{'fraction_non_alphanumeric': 0.17591830011530227, 'fraction_numerical': 0.005270960303080217, 'mean_word_length': 4.1068124474348195, 'pattern_counts': {'":': 0, '<': 5, '<?xml version=': 0, '>': 25, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '6104354', 'n_tokens_mistral': 1891, 'n_tokens_neox': 1802, 'n_words': 630}