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<?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();
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.29, 7.4.0 - 7.4.21, 8.0.0 - 8.0.8
The key doesn't found in this array.

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