Related
I'm working on a project whereby I have the following file structure:
index.php
|---lib
|--|lib|type|class_name.php
|--|lib|size|example_class.php
I'd like to auto load the classes, class_name and example_class (named the same as the PHP classes), so that in index.php the classes would already be instantiated so I could do:
$class_name->getPrivateParam('name');
I've had a look on the net but can't quite find the right answer - can anyone help me out?
EDIT
Thanks for the replies. Let me expand on my scenario. I'm trying to write a WordPress plugin that can be dropped into a project and additional functionality added by dropping a class into a folder 'functionality' for example, inside the plugin. There will never be 1000 classes, at a push maybe 10?
I could write a method to iterate through the folder structure of the 'lib' folder, including every class then assigning it to a variable (of the class name), but didn't think that was a very efficient way to do it but it perhaps seems that's the best way to achieve what I need?
Please, if you need to autoload classes - use the namespaces and class names conventions with SPL autoload, it will save your time for refactoring.
And of course, you will need to instantiate every class as an object.
Thank you.
Like in this thread:
PHP Autoloading in Namespaces
But if you want a complex workaround, please take a look at Symfony's autoload class:
https://github.com/symfony/ClassLoader/blob/master/ClassLoader.php
Or like this (I did it in one of my projects):
<?
spl_autoload_register(function($className)
{
$namespace=str_replace("\\","/",__NAMESPACE__);
$className=str_replace("\\","/",$className);
$class=CORE_PATH."/classes/".(empty($namespace)?"":$namespace."/")."{$className}.class.php";
include_once($class);
});
?>
and then you can instantiate your class like this:
<?
$example=new NS1\NS2\ExampleClass($exampleConstructParam);
?>
and this is your class (found in /NS1/NS2/ExampleClass.class.php):
<?
namespace NS1\NS2
{
class Symbols extends \DB\Table
{
public function __construct($param)
{
echo "hello!";
}
}
}
?>
If you have an access to the command line, you can try it with composer in the classMap section with something like this:
{
"autoload": {
"classmap": ["yourpath/", "anotherpath/"]
}
}
then you have a wordpress plugin to enable composer in the wordpress cli : http://wordpress.org/plugins/composer/
function __autoload($class_name) {
$class_name = strtolower($class_name);
$path = "{$class_name}.php";
if (file_exists($path)) {
require_once($path);
} else {
die("The file {$class_name}.php could not be found!");
}
}
UPDATE:
__autoload() is deprecated as of PHP 7.2
http://php.net/manual/de/function.spl-autoload-register.php
spl_autoload_register(function ($class) {
#require_once('lib/type/' . $class . '.php');
#require_once('lib/size/' . $class . '.php');
});
I have an example here that I use for autoloading and initiliazing.
Basically a better version of spl_autoload_register since it only tries to require the class file whenever you initializes the class.
Here it automatically gets every file inside your class folder, requires the files and initializes it. All you have to do, is name the class the same as the file.
index.php
<?php
require_once __DIR__ . '/app/autoload.php';
$loader = new Loader(false);
User::dump(['hello' => 'test']);
autoload.php
<?php
class Loader
{
public static $library;
protected static $classPath = __DIR__ . "/classes/";
protected static $interfacePath = __DIR__ . "/classes/interfaces/";
public function __construct($requireInterface = true)
{
if(!isset(static::$library)) {
// Get all files inside the class folder
foreach(array_map('basename', glob(static::$classPath . "*.php", GLOB_BRACE)) as $classExt) {
// Make sure the class is not already declared
if(!in_array($classExt, get_declared_classes())) {
// Get rid of php extension easily without pathinfo
$classNoExt = substr($classExt, 0, -4);
$file = static::$path . $classExt;
if($requireInterface) {
// Get interface file
$interface = static::$interfacePath . $classExt;
// Check if interface file exists
if(!file_exists($interface)) {
// Throw exception
die("Unable to load interface file: " . $interface);
}
// Require interface
require_once $interface;
//Check if interface is set
if(!interface_exists("Interface" . $classNoExt)) {
// Throw exception
die("Unable to find interface: " . $interface);
}
}
// Require class
require_once $file;
// Check if class file exists
if(class_exists($classNoExt)) {
// Set class // class.container.php
static::$library[$classNoExt] = new $classNoExt();
} else {
// Throw error
die("Unable to load class: " . $classNoExt);
}
}
}
}
}
/*public function get($class)
{
return (in_array($class, get_declared_classes()) ? static::$library[$class] : die("Class <b>{$class}</b> doesn't exist."));
}*/
}
You can easily manage with a bit of coding, to require classes in different folders too. Hopefully this can be of some use to you.
You can specify a namespaces-friendly autoloading using this autoloader.
<?php
spl_autoload_register(function($className) {
$file = __DIR__ . '\\' . $className . '.php';
$file = str_replace('\\', DIRECTORY_SEPARATOR, $file);
if (file_exists($file)) {
include $file;
}
});
Make sure that you specify the class file's location corretly.
Source
spl_autoload_register(function ($class_name) {
$iterator = new DirectoryIterator(dirname(__FILE__));
$files = $iterator->getPath()."/classes/".$class_name.".class.php";
if (file_exists($files)) {
include($files);
} else {
die("Warning:The file {$files}.class.php could not be found!");
}
});
do this in a file and called it anything like (mr_load.php)
this were u put all your classes
spl_autoload_register(function($class){
$path = '\Applicaton/classes/';
$extension = '.php';
$fileName = $path.$class.$extension;
include $_SERVER['DOCUMENT_ROOT'].$fileName;
})
;
then create another file and include mr_load.php; $load_class = new BusStop(); $load_class->method()
I am using classes with Wordpress and I am trying to autoload them in my functions.php file:
spl_autoload_register(function($class) {
include('classes/'.$class.'.php');
});
This is what my classes directory looks like:
classes/
project/
Application.php
Core.php
Site.php
Helpers.php
utils/
Helpers.php
Twig.php
views/
Layout.php
Modules.php
pages/
Home.php
Each class is namespaced based on the directory it is in. For example:
$homeClass = new \views\pages\Home();
When I autoload the classes, I get this error:
PHP Warning: include(classes/project\Application.php): failed to open stream: No such file or directory
Obviously the backslashes that are part of the namespacing don't work in the path. I could update my function to replace the backslashes with forward slashes like this:
spl_autoload_register(function($class) {
include('classes/'.str_replace("\\", "/", $class).'.php');
});
But it seems odd that that would be required. Am I missing something?
I have an example here.
Basically a better version of spl_autoload_register since it only tries to require the class file whenever you initializes the class.
Here it automatically gets every file inside your class folder, requires the files and initializes it. All you have to do, is name the class the same as the file.
index.php
<?php
require_once __DIR__ . '/app/autoload.php';
$loader = new Loader(false);
User::dump(['hello' => 'test']);
autoload.php
<?php
class Loader
{
public static $library;
protected static $classPath = __DIR__ . "/classes/";
protected static $interfacePath = __DIR__ . "/classes/interfaces/";
public function __construct($requireInterface = true)
{
if(!isset(static::$library)) {
// Get all files inside the class folder
foreach(array_map('basename', glob(static::$classPath . "*.php", GLOB_BRACE)) as $classExt) {
// Make sure the class is not already declared
if(!in_array($classExt, get_declared_classes())) {
// Get rid of php extension easily without pathinfo
$classNoExt = substr($classExt, 0, -4);
$file = static::$path . $classExt;
if($requireInterface) {
// Get interface file
$interface = static::$interfacePath . $classExt;
// Check if interface file exists
if(!file_exists($interface)) {
// Throw exception
die("Unable to load interface file: " . $interface);
}
// Require interface
require_once $interface;
//Check if interface is set
if(!interface_exists("Interface" . $classNoExt)) {
// Throw exception
die("Unable to find interface: " . $interface);
}
}
// Require class
require_once $file;
// Check if class file exists
if(class_exists($classNoExt)) {
// Set class // class.container.php
static::$library[$classNoExt] = new $classNoExt();
} else {
// Throw error
die("Unable to load class: " . $classNoExt);
}
}
}
}
}
/*public function get($class)
{
return (in_array($class, get_declared_classes()) ? static::$library[$class] : die("Class <b>{$class}</b> doesn't exist."));
}*/
}
You can easily manage with a bit of coding, to require classes in different folders too. Hopefully this can be of some use to you.
It's not odd at all!
Registering your autoloaders using namespaces as a means to denote a directory structure is fairly common practice. I would recommend following PSR-4 conventions, but if you you're too far in to refactor your naming conventions, then I would recommend using the DIRECTORY_SEPARATOR constant to help PHP decide whether to use '/' or '\', as Windows servers use the latter, and Linux servers use the former.
I've made a class for this requirement, compatible with PSR-4.
You can reach it here:
https://github.com/pablo-pacheco/wp-namespace-autoloader
The explanation is all there but basically it's a composer dependency. You just have to require it in your project:
"require": {
"pablo-pacheco/wp-namespace-autoloader": "dev-master"
}
And then call the class
<?php
new \WP_Namespace_Autoloader( array(
'directory' => __DIR__, // Directory of your project. It can be your theme or plugin. __DIR__ is probably your best bet.
'namespace' => __NAMESPACE__, // Main namespace of your project. E.g My_Project\Admin\Tests should be My_Project. Probably if you just pass the constant __NAMESPACE__ it should work
'classes_dir' => 'src', // (optional). It is where your namespaced classes are located inside your project. If your classes are in the root level, leave this empty. If they are located on 'src' folder, write 'src' here
) );
I appreciate any kind of feedback!
Try this class, it autoloads with or without namespaces
I'm working on a project whereby I have the following file structure:
index.php
|---lib
|--|lib|type|class_name.php
|--|lib|size|example_class.php
I'd like to auto load the classes, class_name and example_class (named the same as the PHP classes), so that in index.php the classes would already be instantiated so I could do:
$class_name->getPrivateParam('name');
I've had a look on the net but can't quite find the right answer - can anyone help me out?
EDIT
Thanks for the replies. Let me expand on my scenario. I'm trying to write a WordPress plugin that can be dropped into a project and additional functionality added by dropping a class into a folder 'functionality' for example, inside the plugin. There will never be 1000 classes, at a push maybe 10?
I could write a method to iterate through the folder structure of the 'lib' folder, including every class then assigning it to a variable (of the class name), but didn't think that was a very efficient way to do it but it perhaps seems that's the best way to achieve what I need?
Please, if you need to autoload classes - use the namespaces and class names conventions with SPL autoload, it will save your time for refactoring.
And of course, you will need to instantiate every class as an object.
Thank you.
Like in this thread:
PHP Autoloading in Namespaces
But if you want a complex workaround, please take a look at Symfony's autoload class:
https://github.com/symfony/ClassLoader/blob/master/ClassLoader.php
Or like this (I did it in one of my projects):
<?
spl_autoload_register(function($className)
{
$namespace=str_replace("\\","/",__NAMESPACE__);
$className=str_replace("\\","/",$className);
$class=CORE_PATH."/classes/".(empty($namespace)?"":$namespace."/")."{$className}.class.php";
include_once($class);
});
?>
and then you can instantiate your class like this:
<?
$example=new NS1\NS2\ExampleClass($exampleConstructParam);
?>
and this is your class (found in /NS1/NS2/ExampleClass.class.php):
<?
namespace NS1\NS2
{
class Symbols extends \DB\Table
{
public function __construct($param)
{
echo "hello!";
}
}
}
?>
If you have an access to the command line, you can try it with composer in the classMap section with something like this:
{
"autoload": {
"classmap": ["yourpath/", "anotherpath/"]
}
}
then you have a wordpress plugin to enable composer in the wordpress cli : http://wordpress.org/plugins/composer/
function __autoload($class_name) {
$class_name = strtolower($class_name);
$path = "{$class_name}.php";
if (file_exists($path)) {
require_once($path);
} else {
die("The file {$class_name}.php could not be found!");
}
}
UPDATE:
__autoload() is deprecated as of PHP 7.2
http://php.net/manual/de/function.spl-autoload-register.php
spl_autoload_register(function ($class) {
#require_once('lib/type/' . $class . '.php');
#require_once('lib/size/' . $class . '.php');
});
I have an example here that I use for autoloading and initiliazing.
Basically a better version of spl_autoload_register since it only tries to require the class file whenever you initializes the class.
Here it automatically gets every file inside your class folder, requires the files and initializes it. All you have to do, is name the class the same as the file.
index.php
<?php
require_once __DIR__ . '/app/autoload.php';
$loader = new Loader(false);
User::dump(['hello' => 'test']);
autoload.php
<?php
class Loader
{
public static $library;
protected static $classPath = __DIR__ . "/classes/";
protected static $interfacePath = __DIR__ . "/classes/interfaces/";
public function __construct($requireInterface = true)
{
if(!isset(static::$library)) {
// Get all files inside the class folder
foreach(array_map('basename', glob(static::$classPath . "*.php", GLOB_BRACE)) as $classExt) {
// Make sure the class is not already declared
if(!in_array($classExt, get_declared_classes())) {
// Get rid of php extension easily without pathinfo
$classNoExt = substr($classExt, 0, -4);
$file = static::$path . $classExt;
if($requireInterface) {
// Get interface file
$interface = static::$interfacePath . $classExt;
// Check if interface file exists
if(!file_exists($interface)) {
// Throw exception
die("Unable to load interface file: " . $interface);
}
// Require interface
require_once $interface;
//Check if interface is set
if(!interface_exists("Interface" . $classNoExt)) {
// Throw exception
die("Unable to find interface: " . $interface);
}
}
// Require class
require_once $file;
// Check if class file exists
if(class_exists($classNoExt)) {
// Set class // class.container.php
static::$library[$classNoExt] = new $classNoExt();
} else {
// Throw error
die("Unable to load class: " . $classNoExt);
}
}
}
}
}
/*public function get($class)
{
return (in_array($class, get_declared_classes()) ? static::$library[$class] : die("Class <b>{$class}</b> doesn't exist."));
}*/
}
You can easily manage with a bit of coding, to require classes in different folders too. Hopefully this can be of some use to you.
You can specify a namespaces-friendly autoloading using this autoloader.
<?php
spl_autoload_register(function($className) {
$file = __DIR__ . '\\' . $className . '.php';
$file = str_replace('\\', DIRECTORY_SEPARATOR, $file);
if (file_exists($file)) {
include $file;
}
});
Make sure that you specify the class file's location corretly.
Source
spl_autoload_register(function ($class_name) {
$iterator = new DirectoryIterator(dirname(__FILE__));
$files = $iterator->getPath()."/classes/".$class_name.".class.php";
if (file_exists($files)) {
include($files);
} else {
die("Warning:The file {$files}.class.php could not be found!");
}
});
do this in a file and called it anything like (mr_load.php)
this were u put all your classes
spl_autoload_register(function($class){
$path = '\Applicaton/classes/';
$extension = '.php';
$fileName = $path.$class.$extension;
include $_SERVER['DOCUMENT_ROOT'].$fileName;
})
;
then create another file and include mr_load.php; $load_class = new BusStop(); $load_class->method()
my class naming convention: class.ClassName.php
my class file naming convention: class.classname.php (hence the strtolower).
the class files are located in the include path: /home/content/XX/XXXXXX/html/projects/include/
//autoload.php
<?php
class Autoload {
public static function autoloadClasses($className) {
$className = strtolower($className);
$file = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'include/class.' . $className. '.php';
require_once($file);
}
}
$register = spl_autoload_register('Autoload::autoloadClasses');
?>
//check4.php
<?php
$company = $s->company;
$projectName = 'development';
$items = array('type', 'scope', 'table', 'conditions');
$things = array('select', '*', 'todos', array('company'=>$company, PROJECT_NAME=>$projectName));
$combinedArray = array_combine($items, $things);
$q = new Query($combinedArray);
?>
verified classes exist and are included http://technicheian.com/images/includedClasses.png
on every page that makes use of a class (e.g. this one calling Query; located class.query.php:
05-Nov-2011 20:18:30]PHP Fatal error: Class 'Query' not found in /home/content/XX/XXXXXX/html/projects/check4.php on line 9
at the end of class.session.php is $s = new Session (noted here to say that the $company variable should not be empty).
I've read pretty much every article, how-to, etc. I can find. What am I missing?
running php 5.2
delete the file_exists check and look at your error logs. You will see which file you were trying to require. I think it may be confusion on what __FILE__ does (because it is working on the autoload.php file).
Edit: It looks like this
dirname(__FILE__) . DIRECTORY_SEPARATOR . 'include/class.'
should be changed to
/home/content/XX/XXXXXX/html/projects/include/class.
There are a number of things for you to check to ensure that autoloading works:
For your custom autoloading to be active it must be registered. So the spl_autoload_register('Autoload::autoloadClasses') must be executed. A good way of doing this is to edit php.ini and set the auto_prepend file to call your autoload file.
Your autoload code must then find the correct file with the correct extension (possibly respecting the php include_path priority that you want).
This is how I autoload all the classes in my controllers folder,
# auto load controller classes
function __autoload($class_name)
{
$filename = 'class_'.strtolower($class_name).'.php';
$file = AP_SITE.'controllers/'.$filename;
if (file_exists($file) == false)
{
return false;
}
include ($file);
}
But I have classes in models folder as well and I want to autoload them too - what should I do? Should I duplicate the autoload above and just change the path to models/ (but isn't this repetitive??)?
Thanks.
EDIT:
these are my classes file names in the controller folder:
class_controller_base.php
class_factory.php
etc
these are my classes file names in the model folder:
class_model_page.php
class_model_parent.php
etc
this is how I name my controller classes class usually (I use underscores and lowcaps),
class controller_base
{
...
}
class controller_factory
{
...
}
this is how I name my model classes class usually (I use underscores and lowcaps),
class model_page
{
...
}
class model_parent
{
...
}
I see you are using controller_***** and model_***** as a class naming convention.
I read a fantastic article, which suggests an alternative naming convention using php's namespace.
I love this solution because it doesn't matter where I put my classes. The __autoload will find it no matter where it is in my file structure. It also allows me to call my classes whatever I want. I don't need a class naming convention for my code to work.
You can, for example, set up your folder structure like:
application/
controllers/
Base.php
Factory.php
models/
Page.php
Parent.php
Your classes can be set up like this:
<?php
namespace application\controllers;
class Base {...}
and:
<?php
namespace application\models;
class Page {...}
The autoloader could look like this (or see 'a note on autoloading' at the end):
function __autoload($className) {
$file = $className . '.php';
if(file_exists($file)) {
require_once $file;
}
}
Then... you can call classes in three ways:
$controller = new application\controllers\Base();
$model = new application\models\Page();
or,
<?php
use application\controllers as Controller;
use application\models as Model;
...
$controller = new Controller\Base();
$model = new Model\Page();
or,
<?php
use application\controllers\Base;
use application\models\Page;
...
$controller = new Base();
$model = new Page();
EDIT - a note on autoloading:
My main auto loader looks like this:
// autoload classes based on a 1:1 mapping from namespace to directory structure.
spl_autoload_register(function ($className) {
# Usually I would just concatenate directly to $file variable below
# this is just for easy viewing on Stack Overflow)
$ds = DIRECTORY_SEPARATOR;
$dir = __DIR__;
// replace namespace separator with directory separator (prolly not required)
$className = str_replace('\\', $ds, $className);
// get full name of file containing the required class
$file = "{$dir}{$ds}{$className}.php";
// get file if it is readable
if (is_readable($file)) require_once $file;
});
This autoloader is a direct 1:1 mapping of class name to directory structure; the namespace is the directory path and the class name is the file name. So the class application\controllers\Base() defined above would load the file www/application/controllers/Base.php.
I put the autoloader into a file, bootstrap.php, which is in my root directory. This can either be included directly, or php.ini can be modified to auto_prepend_file so that it is included automatically on every request.
By using spl_autoload_register you can register multiple autoload functions to load the class files any which way you want. Ie, you could put some or all of your classes in one directory, or you could put some or all of your namespaced classes in the one file. Very flexible :)
You should name your classes so the underscore (_) translates to the directory separator (/). A few PHP frameworks do this, such as Zend and Kohana.
So, you name your class Model_Article and place the file in classes/model/article.php and then your autoload does...
function __autoload($class_name)
{
$filename = str_replace('_', DIRECTORY_SEPARATOR, strtolower($class_name)).'.php';
$file = AP_SITE.$filename;
if ( ! file_exists($file))
{
return FALSE;
}
include $file;
}
Also note you can use spl_autoload_register() to make any function an autoloading function. It is also more flexible, allowing you to define multiple autoload type functions.
If there must be multiple autoload functions, spl_autoload_register() allows for this. It effectively creates a queue of autoload functions, and runs through each of them in the order they are defined. By contrast, __autoload() may only be defined once.
Edit
Note : __autoload has been DEPRECATED as of PHP 7.2.0. Relying on this feature is highly discouraged. Please refer to PHP documentation for more details. http://php.net/manual/en/function.autoload.php
I have to mention something about "good" autoload scripts and code structure, so read the following CAREFULLY
Keep in Mind:
Classname === Filename
Only ONE class per file
e.g: Example.php contains
class Example {}
Namespace === Directory structure
e.g: /Path1/Path2/Example.php matches
namespace Path1\Path2;
class Example {}
There SHOULD be a Root-Namespace to avoid collisions
e.g: /Path1/Path2/Example.php with root:
namespace APP\Path1\Path2;
class Example {}
NEVER use manually defined path or directory lists, just point the loader to the top most directory
Keep the loader AS FAST AS POSSIBLE (because including a file is expensive enough)
With this in mind, i produced the following script:
function Loader( $Class ) {
// Cut Root-Namespace
$Class = str_replace( __NAMESPACE__.'\\', '', $Class );
// Correct DIRECTORY_SEPARATOR
$Class = str_replace( array( '\\', '/' ), DIRECTORY_SEPARATOR, __DIR__.DIRECTORY_SEPARATOR.$Class.'.php' );
// Get file real path
if( false === ( $Class = realpath( $Class ) ) ) {
// File not found
return false;
} else {
require_once( $Class );
return true;
}
}
Where to place it..
/Loader.php <-- there goes the loader
/Controller/... <-- put ur stuff here
/Model/... <-- or here, etc
/...
Remeber:
if you use a root namespace, the loader has to be in this namespace too
you may prefix $Class to match your needs (controller_base {} -> class_controller_base.php)
you may change __DIR__ to an absolute path containing your class files (e.g. "/var/www/classes")
if you don't use namespaces, all files has to be in the same directory together with the loader (bad!)
Happy coding ;-)
A little review at other answers:
THIS IS JUST MY PERSONAL OPINION - NO OFFENSE INTENDED!
https://stackoverflow.com/a/5280353/626731
#alex good solution, but don't make you class names pay for bad file structures ;-)
this is job for namespaces
https://stackoverflow.com/a/5280510/626731 #Mark-Eirich it works, but its pretty nasty/ugly/slow/stiff[..] style to do it this way..
https://stackoverflow.com/a/5284095/626731 #tealou for his problem to be solved this is the most clear approach so far :-) ..
https://stackoverflow.com/a/9628060/626731 #br3nt this reflects my point of view, but please(!) .. dont use strtr!! .. which brings me to:
https://stackoverflow.com/a/11866307/626731 #Iscariot .. to you, a little "you-know-bullshit-benchmark:
Time sprintf preg_replace strtr str_replace v1 str_replace v2
08:00:00 AM 1.1334 2.0955 48.1423 1.2109 1.4819
08:40:00 AM 1.0436 2.0326 64.3492 1.7948 2.2337
11:30:00 AM 1.1841 2.5524 62.0114 1.5931 1.9200
02:00:00 PM 0.9783 2.4832 52.6339 1.3966 1.4845
03:00:00 PM 1.0463 2.6164 52.7829 1.1828 1.4981
Average 1.0771 2.3560 55.9839 1.4357 1.7237
Method Times Slower (than sprintf)
preg_replace 2.19
strtr 51.97
str_replace v1 1.33
str_replace v2 1.6
Source: http://www.simplemachines.org/community/index.php?topic=175031.0
Questions?.. (But he is in fact right about full path including)
https://stackoverflow.com/a/12548558/626731 #Sunil-Kartikey
https://stackoverflow.com/a/17286804/626731 #jurrien
NEVER loop in time critical environment! Don't search for files on os! - SLOW
https://stackoverflow.com/a/21221590/626731 #sagits .. much better than Marks ;-)
function autoload($className)
{
//list comma separated directory name
$directory = array('', 'classes/', 'model/', 'controller/');
//list of comma separated file format
$fileFormat = array('%s.php', '%s.class.php');
foreach ($directory as $current_dir)
{
foreach ($fileFormat as $current_format)
{
$path = $current_dir.sprintf($current_format, $className);
if (file_exists($path))
{
include $path;
return ;
}
}
}
}
spl_autoload_register('autoload');
Here is my solution,
/**
* autoload classes
*
*#var $directory_name
*
*#param string $directory_name
*
*#func __construct
*#func autoload
*
*#return string
*/
class autoloader
{
private $directory_name;
public function __construct($directory_name)
{
$this->directory_name = $directory_name;
}
public function autoload($class_name)
{
$file_name = 'class_'.strtolower($class_name).'.php';
$file = AP_SITE.$this->directory_name.'/'.$file_name;
if (file_exists($file) == false)
{
return false;
}
include ($file);
}
}
# nullify any existing autoloads
spl_autoload_register(null, false);
# instantiate the autoloader object
$classes_1 = new autoloader('controllers');
$classes_2 = new autoloader('models');
# register the loader functions
spl_autoload_register(array($classes_1, 'autoload'));
spl_autoload_register(array($classes_2, 'autoload'));
I'm not sure whether it is the best solution or not but it seems to work perfectly...
What do you think??
My version of #Mark Eirich answer:
function myload($class) {
$controllerDir = '/controller/';
$modelDir = '/model/';
if (strpos($class, 'controller') !== false) {
$myclass = $controllerDir . $class . '.php';
} else {
$myclass = $modelDir . $class . '.inc.php';
}
if (!is_file($myclass)) return false;
require_once ($myclass);
}
spl_autoload_register("myload");
In my case only controller class have the keyword in their name, adapt it for your needs.
Simpliest answer I can give you without writing down those complex codes and even without using the namespace (if this confuses you)
Sample Code. Works 100%.
function __autoload($class_name){
$file = ABSPATH . 'app/models/' . $class_name . '.php';
if(file_exists($file)){
include $file;
}else{
$file = ABSPATH . 'app/views/' . $class_name . '.php';
if(file_exists($file)){
include $file;
}else{
$file = ABSPATH . 'app/controllers/' . $class_name . '.php';
include $file;
}
}
I guess the logic is explainable itself. Cheers mate! Hope this helps :)
Here's what I'd do:
function __autoload($class_name) {
$class_name = strtolower($class_name);
$filename = 'class_'.$class_name.'.php';
if (substr($class_name, 0, 5) === 'model') {
$file = AP_SITE.'models/'.$filename;
} else $file = AP_SITE.'controllers/'.$filename;
if (!is_file($file)) return false;
include $file;
}
As long you name your files consistently, like class_controller_*.php and class_model_*.php, this should work fine.
Everyone is is coping and pasting things from code they got off the internet (With the exception of the selected answer). They all use String Replace.
String Replace is 4 times slower than strtr. You should use it instead.
You should also use full paths when including classes with autoloading as it takes less time for the OS to resolve the path.
__autoload() function should not be use because it is not encourged. Use spl_autoload(), spl_autoload_register() instead. __autoload() just can load one class but spl_autoload() can get more than 1 classes. And one thing more, in future __autoload() may deprecated. More stuff can be find on http://www.php.net/manual/en/function.spl-autoload.php
Altough this script doesn't have the name convention and this thread is already a bit old, in case someone is looking of a possible answer, this is what I did:
function __autoload($name) {
$dirs = array_filter(glob("*"), 'is_dir');
foreach($dirs as $cur_dir) {
dir_searcher($cur_dir, $name);
}
}
function dir_searcher($cur_dir, $name) {
if(is_file("$cur_dir/$name.php")) {
require_once "$cur_dir/$name.php";
}
$dirs = array_filter(glob($cur_dir."/*"), 'is_dir');
foreach($dirs as $cdir) {
dir_searcher("$cdir", $name);
}
}
not sure if it is really optimal, but it searches through the folders by reading dir recursively. With a creative str_replace function you can get your name cenvention.
I use this. Basically define your folder structure (MVC etc) as a constant in a serialised array. Then call the array in your autoload class. Works efficiently for me.
You could obviously create the folder array using another function but for MVC you may as well type it in manually.
For this to work you need to call your classes ...... class.classname.php
//in your config file
//define class path and class child folders
define("classPath","classes");
define("class_folder_array", serialize (array ("controller", "model", "view")));
//wherever you have your autoload class
//autoload classes
function __autoload($class_name) {
$class_folder_array = unserialize (class_folder_array);
foreach ($class_folder_array AS $folder){
if(file_exists(classPath."/".$folder.'/class.'.$class_name.'.php')){require_once classPath."/".$folder.'/class.'.$class_name.'.php';break;}
}
}