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PHP – RegexRouter

February 06, 2014

PHP, RegExp

17

PHP Routing class that translates any valid PCRE into a closure, in 14 lines of wholesome goodness For the impatient:

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class RegexRouter {

private $routes = array();

public function route($pattern, $callback) {

$this->routes[$pattern] = $callback;

}

public function execute($uri) {

foreach ($this->routes as $pattern => $callback) {

if (preg_match($pattern, $uri, $params) === 1) {

array_shift($params);

return call_user_func_array($callback, array_values($params));

}

Wrapping / Looping / Infinite Array Traversal

April 10, 2013

ActionScript 2, ActionScript 3, Java, JavaScript, PHP

0

I’ll use JavaScript syntax and provide a JS fiddle POC, but this really applies to almost any language – at least any that use indexed arrays (all that I can think of). To get an index greater than length to “wrap” back from the beginning, use a simple modulus:

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if ( index >= length ) {

index = index % length;

}

To get a negative index […]

PHP + MySQL – get table column names

March 20, 2013

MySQL, PHP

2

1	$pdoInstance->query("desc table_name")->fetchAll(PDO::FETCH_COLUMN);

PHP – seriously simple Router

November 04, 2012

PHP

38

/UPDATE I’ve come to prefer (the very similar) RegexRouter. I’m increasingly uncomfortable with the string replacement in the route method. My upshot of PHP routers (inspired by the various micro-frameworks, like Slim, Silex, F3, Laravel, Tonic, Flight, Klein, etc).

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class Router {

private static $routes = array();

private function __construct() {}

private function __clone() {}

public static function route($pattern, $callback) {

$pattern = '/^' . str_replace('/', '\/', $pattern) . '$/';

self::$routes[$pattern] = $callback;

}

public static function execute($url) {

foreach (self::$routes as $pattern => $callback) {

if (preg_match($pattern, $url, $params)) {

array_shift($params);

return call_user_func_array($callback, array_values($params));

}

Usage…

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Router::route('blog/(\w+)/(\d+)', function($category, $id){

print $category . ':' . $id;

});

Router::execute($_SERVER['REQUEST_URI']);

// if url was http://example.com/blog/php/312 you'd get back "php:312"...

PHP from command line

September 28, 2012

PHP

0

This under-appreciated feature has a couple upsides: 1) speed, 2) debug – it prints (or echos) as it processes, so you can easily break or debug to a particular line or, for example, in a loop iteration when running through a mysql resultset. Very simple use as well. On windows, just open cmd and input: […]

JavaScript + PHP + MySQL – determine if user is online or logged in

September 28, 2012

AJAX, JavaScript, jQuery, MySQL, PHP

0

This is a pretty common task that doesn’t have a perfect answer. It’s not possible to determine if a user disconnects, leaves the page, closes the browser, etc (besides window unload methods, which aren’t practical for this use case). So we fake it as best we can. Here’s how I do it. 1. Create a […]

PHP – sanitize output

August 03, 2012

PHP

2

Whenever you’re printing user-input to a page – even something as simple as re-populating an input from a previous page via cookie – someone’s bound to try to exploit it. Here’s a simple function to help sanitize user input:

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function sanitize($html){

if(get_magic_quotes_gpc()){

$html = stripslashes($html);

}

$html = mb_convert_encoding($html, 'UTF-8', 'UTF-8');

$html = htmlentities($html, ENT_QUOTES, 'UTF-8');

return $html;

}

PHP – really simple linkify

June 30, 2012

PHP, RegExp

20

we all know that it’s impossible to perfectly match URLs from human input… but i spent a little time compiling various solutions on the boards and have ended up with this (note – this is largely pieced together from other sources – I’m not claiming original work):

1	$html = preg_replace('/([a-z]+\:\/\/[a-z0-9\-\.]+\.[a-z]+(:[a-z0-9])?\/?([a-z0-9\-\._\:\?\,\'\/\\\+&%\$#\=~])[^\.\,\)\(\s])/i', $string);

The more difficult part was differentiating what […]

PHP – get tweets

June 30, 2012

PHP

4

There are a ton of ways to do this, but the one I’ve found that’s consistent and transparent utilizes twitter’s json service. The upshot is this:

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$user = 'qozix';

$uri = "http://twitter.com/statuses/user_timeline/{$user}.json?count=10";

$raw = file_get_contents($uri);

$data = json_decode($raw);

which gives back an array of “tweets” – the text property of each element is the one with the actual string of the tweet. so if you wanted […]

PHP – Zend PDF Merge

January 24, 2012

PHP

1

I do a lot of dynamic generation of PDF files as mail attachments, that are never sent to the server as an actual file. I recently had a need to combine them into a single file, which isn’t well documented but is pretty simple – the following function takes an array of Zend_PDF objects and […]