autoloading classes
inside root directory create a autoloader.php file and add the following code :
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<?php
spl_autoload_register(function($className) {
$file = $className . '.php';
if (file_exists($file)) {
include $file;
}
});
inside your usage file :
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<?php
include 'autoload.php';
$circle = new Circle;
$square = new Square;