README

A barebones router for PHP.
It matches urls and executes PHP functions.
Automatic get variable based on handler function parameter list.
Suport to compile router callback handlers into plain array source code.

中文版.

Installation

composer require bephp/router

API Reference

group/prefix($prefix, $hook)

add group routers with same prefix. if not pass param $prefix just reset attribute prefix of router instance to empty string. will merge the $hook to this group.

match($method, $path, $callback, $hook)

create the router tree based on given $method and $path, the $callback and $hook will stored in the leaf node.

get/post/put/delete/head/options($path, $callback, $hook)

wrap the match method without $method parameter. also defined "post", "put", "delete", "head" and so on.

execute()

the enter point of the application. have 3 optional parameters, $params will be merged with request variable and passed into callback handler. can pass $method and $path when not deploy as web server, can using the 2 parameters to test this library.

error()

1. if call this API with $error_code and $callback, just define the callback handler for the error code.
2. if call this API with $error_code and other parameters, will trigger the error callback handler, the parameters will passed to the error handler.

hook()

1. if call this API with $hook_name and $callback, just define the callback handler for the hook name.
2. if call this API with $hook_name and other parameters, will trigger the hook handler, the parameters will passed to the hook handler.
3. there's 2 spec hook: "before" and "after", this library will auto call "before" hook before execute the handler, and call "after" hook after execute the handler.
4. the "after" hook will auto trigger with the return value of callback handler.
5. the "before" hook, and other user define hooks will auto trigger with the current router object $router, and the merged params stored in $router->params. if these hook return false, will trigger 406 error handler.

Validate

using ctype functions to validate params in pathinfo
example:

if defined router: "/hello/:name:a.json", and using URL: "/hello/lloyd.json" to resolve url.
will call function "ctype_alpha" to validate "lloyd".
validate command to map the ctype functions:

A => ctype_alnum
a => ctype_alpha
d => ctype_digit
x => ctype_xdigit
l => ctype_lower
u => ctype_upper

Compile

the PHP request always match the callback handlers every time. but the request just match one callback. so we can compile the routed tree node into plain array, to save time.

DEV model

using CRouter instead of Router, will always compile the source code into target file.

$crouter = new CRouter("router.inc.php", true);

PRODUCTION model

just include the target source code, and execute it with parameters.

$router = include("router.inc.php");
$router->execute();

Performance

1. using tree struct to stored callback handler on leaf node. Ensure that the time complexity of find callback function is O(log n).
2. using CRouter class, suport to compile router callback handlers into plain array source code. so can save time to create tree node to store callback by split pathinfo.

Benchmark

using "php-router-benchmark" to test router performance.

Worst-case matching

This benchmark matches the last route and unknown route. It generates a randomly prefixed and suffixed route in an attempt to thwart any optimization. 1,000 routes each with 9 arguments.

This benchmark consists of 10 tests. Each test is executed 1,000 times, the results pruned, and then averaged. Values that fall outside of 3 standard deviations of the mean are discarded.

Example

belong is one simple example, see the full examples in example.php.

(new Router())
->error(405, function($message){
    header('Location: /hello/world', true, 302);
})
->get('/hello/:name', function($name){
    echo "Hello $name !!!";
})

Start server

php -S 0.0.0.0:8888 example.php

Test

Url not match, trigger 405 error handler.

curl -vvv 127.0.0.1:8888
> GET / HTTP/1.1
> User-Agent: curl/7.35.0
> Host: 127.0.0.1:8888
> Accept: */*
> 
< HTTP/1.1 302 Found
< Host: 127.0.0.1:8888
< Connection: close
< X-Powered-By: PHP/5.5.9-1ubuntu4.12
< Location: /hello/world
< Content-type: text/html
< 
* Closing connection 0

Url match get current result.

curl -vvv 127.0.0.1:8888/hello/lloyd
* Connected to 127.0.0.1 (127.0.0.1) port 8888 (#0)
> GET /hello/lloyd HTTP/1.1
> User-Agent: curl/7.35.0
> Host: 127.0.0.1:8888
> Accept: */*
> 
< HTTP/1.1 200 OK
< Host: 127.0.0.1:8888
< Connection: close
< X-Powered-By: PHP/5.5.9-1ubuntu4.12
< Content-type: text/html
< 
* Closing connection 0
Hello lloyd !!!

Demo

there's one blog demo, work with ActiveRecord and MicroTpl.