<?php ini_set('error_reporting', E_ALL); ini_set('display_errors', 1); class Foo { /** * Values * @var array */ const VALUES = [ 'key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3' ]; /** * Test function */ public function execute() { $key = 'key4'; if (!empty(self::VALUES[$key])) { self::VALUES[$key]; } else { echo 'The key doesn\'t found in this array.'; } } } $foo = new Foo(); $foo->execute();
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