<?php class ScreenLogger { public function debug($message, $data) { echo $message . "<br>" . var_export($data, true) . "<hr>"; } } class ExampleClass { public $logger; public function __construct($logger = null) { $this->logger = $logger; } public function __invoke() { if ($this->logger) { echo "hooray!"; } } } $logger = new ScreenLogger(); $example = new ExampleClass($logger); echo var_export($example->logger, true) . "\n"; $example();
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