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Package slimx
Short Description Lightweight templating and PDO data access for Slim
License MIT
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Informations about the package slimx
SlimX - Extensions for Slim
Note that SlimX is no longer developed or supported, and probably isn't useful with current versions of Slim. You're welcome to try to adapt it for your own purposes, though, consistent with the MIT license.
This is a very small set of extensions for the Slim Framework, a Sinatra-like "microframework" for PHP.
A couple years ago I started my own PHP microframework, Flagpole; it became usable, but never really advanced much, and I shelved it when it became clear there were other better projects of a similar nature like Slim.
Actually starting a project in Slim, though, showed me two things that I missed from Flagpole: a lightweight database access wrapper and a "native PHP" templating system that at least supported the concept of layouts like early Rails apps did. It appears a lot of people using Slim are using Twig for templating; I think Twig is a terrific template system, but sometimes you don't need that level of abstraction, or you're working with co-workers who only know pure PHP. And often you don't need an ORM, but you'd still like to have some convenience wrappers for database access.
Installation
The best way to install SlimX is through Composer. In your composer.json file:
{
"require": {
"slim/slim": "2.*",
"chipotle/slimx": "dev-master"
}
}If you're doing manual installation, SlimX follows the PSR-0 standard.
\Slimx\View
This class extends \Slim\View to have two extra concepts: layouts and the base tag.
Usage
Simply instantiate the Slim application object with Slimx set as a custom view provider. The API is the same as Slim's native view.
$app = new \Slim\Slim([
'view' => new \Slimx\View();
]);Layouts
This is a simple version of template inheritance. A template's layout is just a "frame" in which the content is placed, appropriately enough in the variable $content. A layout might look like this:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Site</title>
<link rel="stylesheet" href="<?= $_base ?>/css/style.css">
</head>
<body>
<div class="container">
<?= $content ?>
</div>
</body>
</html>You can specify a default layout file for a site by passing it as an argument to the constructor:
new \Slimx\View('_mylayout.php');With no argument, the file will take the default name of _layout.php. You can also pass false as the layout argument, and there will be no default layout set.
Layouts are stored in the template directory you've configured (templates by default). Layouts will have access to all the variables the template does.
An individual view can override the application-wide layout by setting the special key _layout in its data array to the name of the new template:
$app->render('page.php', [
'_layout' => 'other_layout.php'
]);As with the application-wide layout, if you set a view's _layout key to false it will have no layout.
Base variable
You might have noticed $_base in the template above. This is always automatically set to the SCRIPT_NAME Slim environment. Why? Because the first time I tried to set up a URL like
$app->get('/item/create', function() { ... });...my CSS files stopped working, because they're all relative to the virtual directory that path segment implies, i.e., /item/css/. If you know your app is always going to be deployed at the same base all the time, in both development and production, you don't need this, but you might not always know it.
\Slim\DB
This expects you to have set up to four keys in your Slim application config space ($app->config()), one of which is always required.
dsn: a valid PDO-style DSN, i.e.,mysql:host=localhost;dbname=mydb. You may use the "@" key as a placeholder for the database name, which is useful if you need to access more than one database. (My first Slim app actually needed to!)db_user: The database username, if needed.db_password: The database password, if needed.pdo_fetch_style: a PDO constant to specify the fetch style, if you don't like Slimx's default choice ofPDO::FETCH_OBJ.
Constructor
The optional first argument is a database name for the PDO object to instantiate, if you're using the "@" placeholder trick described above. If you're just using one database you don't need it.
$db = new \Slimx\DB();DB::getPdo()
Returns the PDO object itself, if you need it.
DB::query($query, $params)
Executes SQL query, with an optional parameter or array.
$db->query('UPDATE mytable SET foo = ? WHERE id = 1', 'banana');If you only need to pass one parameter, it doesn't need to be an array; multiple parameters do need to be an array. Use an associative array for named parameters (array(':foo' => 'banana', ':bar' => 'apricot')).
This will return a PDOStatement object.
DB:exec($query, $params)
This is essentially the same as DB::query but rather than returning a PDOStatement object, it returns the count of affected rows. In many cases this is going to be more useful feedback.
DB::read($query, $params)
Executes the given query, as above, but returns a single row directly. If the query returns more than one row, you're only getting the first one back. (If you want more than one row, use readSet below or roll your own.)
$res = $db->read('SELECT * FROM mytable WHERE id = ?', 2);- For a single-column result, you get the single return value.
- For a multiple-column result, you'll get an object (or whatever you've requested if you've changed the fetch style).
DB::readSet($query, $params)
Executes the given query, as above, but returns the result values directly.
$res = $db->readset('SELECT id, name, other_id FROM mytable');- For a single-column result, you get an array.
- For a multiple-column result, you'll get an array of objects (or whatever you've requested if you've changed the fetch style).
DB::readHash($query, $params)
A special version of readSet designed for queries that return only two columns: this will return an associative array where the first column is the key and the second column is the value.
$res = $db->readHash('SELECT id, name FROM mytable');Returns (for example):
array(1001 => 'banana', 1002 => 'apricot', 1003 => 'carambola')This will throw a LengthException if the query returns more or less than two columns.
DB::insert($table, $data)
Inserts the data given in $data -- which should be an associative array or an object of similar functionality, like the ones returned by PDO -- into a specified table.
$data = array('id'=>1, 'name'=>'banana', 'other_id'=>42);
$db->insert('mytable', $data);DB:update($table, $data, $key)
The equivalent of the above, but for updating existing records. $key should be the column name of the primary key used for the updating. (Yes, this only supports single-column keys, sorry; if you need more than one, use query to do it.) The default name of the primary key is (surprise) id. The $data array/object must contain a field for the primary key, or the program will poop, by which I mean throw an InvalidArgumentException.
$data = array('id'=>1, 'name'=>'banana', 'other_id'=>42);
$db->update('mytable', $data);DB:save($table, $data, $key)
Combines the last two in one quasi-clever operation: if the primary key exists in the database, it's an UPDATE, otherwise it's an INSERT.
DB:get($table, where, $key)
This is a convenience-maybe function that will return all columns in one or more rows of a single table. It can be called in one of two forms:
$db->get('mytable', 2);
$db->get('mytable', 'id >= 100 AND id <= 200');In the first form, it will retrieve the record from mytable whose id column is 2, and return it as an object (or whatever your PDO fetch style is set to). In the second form, it will retrieve all the records from mytable matching that WHERE clause and return an array of objects (or whatevers).
In both cases, you can specify an optional third argument. In the first case, the third argument is the name of the column to look up if you don't want it to be id; in the second case, the third argument is a parameter array, similar to the various read functions.
$db->get('mytable', 2, 'id');
$db->get('mytable', 'id >= ? AND id <= ?', array($x, $y));Note that the function differentiates between the first and second forms by testing to see whether the second argument is a string. So, you can't use the first form of this function if you have a table whose primary keys are strings.
The get and save functions are meant to function together for minimalist CRUD functionality:
$post = $db->get('post', $id);
$post->title = 'New Title';
$post->body = 'Lorem Ipsum';
$post->user_id = $user->id;
$db->update('post', $post);If you need an actual ORM, though, you're almost certainly better off using an existing, robust ORM like Doctrine.
PHPUnit Tests
These are (fairly) complete for the DB class, but not implemented yet for the View class.
