Create instances of all classes in a directory with PHP

Question

I have a directory with several PHP files consisting of classes with the same names as the files. (Sample.php's class will be called Sample.)

Each of these classes have a function called OnCall().

How can I create an instance of every class in my directory and execute all of their OnCall()s?

I cannot do it manually ($sample = new Sample(); $sample->OnCall();, etc etc etc) because more classes will be added, edited and deleted by users.

Solution 1

Something like this ought to get the job done:

<?php

    foreach (glob('test/class/*.php') as $file)
    {
        require_once $file;

        // get the file name of the current file without the extension
        // which is essentially the class name
        $class = basename($file, '.php');

        if (class_exists($class))
        {
            $obj = new $class;
            $obj->OnCall();
        }
    }

Solution 2

This is an old question, but I think this is a better solution.

Just by doing:

use Symfony\Component\ClassLoader\ClassMapGenerator;

var_dump(ClassMapGenerator::createMap(__DIR__.'/library'));

You get:

Array
(
    [Acme\Foo] => /var/www/library/foo/Bar.php
    [Acme\Foo\Bar] => /var/www/library/foo/bar/Foo.php
    [Acme\Bar\Baz] => /var/www/library/bar/baz/Boo.php
    [Acme\Bar] => /var/www/library/bar/Foo.php
)

(taken from the documentation)

Solution 3

Since the Symfony ClassLoader component is deprecated, you can use ClassMapGenerator from Composer.

You need first to add Composer files with:

composer require composer/composer

Then you can use:

$map = ClassMapGenerator::createMap(__DIR__ . '/mydirectory');

You will get the related associative table with fully qualified name and file path.

Solution 4

You make a custom loop with in directory and take all required filenames then make something like this.

if $filename = your filename

require_once $filename;
$className = basename($filename, ".php");
$class = new $className;
$class->OnCall();

Another solution is to store all required filenames in array and then loop its array.

View more solutions

Comments

[Marc]

similar to how I would go. I recommend @ suppressing errors on the require, then test for access. Otherwise errors will bring the system to a halt.

[Mark]

I'm not sure how it could fail to require the file, seeing as glob() has found it (therefore it must exist).

[Marc]

Instance of a collision (programmer error). I have built this pattern many times and I always include error suppression+check. Just my $0.02 as I agree that glob() should be solid, php produces "amazing" results sometimes.

[Benjamin C.]

Thanks for your first contribution! :) To make your answer easier to read, please use the code block and even add the syntax highlighting on it!

[Rico Leuthold]

This is nice - already available in Laravel, and I suppose in Symfony as well ;-)

[Nathan Arthur]

Looks like the component has been removed from the latest version of Symfony. Is there another way to get this functionality?

[Will Shaver]

github.com/symfony/class-loader/blob/master/…

[wali razzaq]

As of today, you can use it \Composer\Autoload\ClassMapGenerator

[aariow]

You can remove require_once if you're using composer . In addition, there are some PHP functions like spl_autoload_register() and __autoload() (deprecated as of PHP 7.2.0) Autoloading Classes.