Online PHP editor | output for bc8OW

@ 2017-06-02T18:20:19Z

<?php
abstract class Enum {
	private $name;
	protected $allow = [];
	private static $enums;
	
	private function __construct($name) {
	    if (!in_array($name, $this->allow, true)) {
	        throw new \TypeError('Undefined enum ' . get_class($this) . '::' . $name . '()');
	    }
	    $this->name = $name;
	}
	
	public static function __callStatic($name, $args) {
		$id = static::class . ",$name";
		
		if (!isset(self::$enums[$id])) {
			$enum = new static($name);
			self::$enums[$id] = $name;
		}
		
		return self::$enums[$id];
	}
	
	public function __toString() {
	    echo 'I am invoked';
		return $this->name;
	}
}

/**
 * @method static RED()
 * @method static GREEN()
 * @method static BLUE()
 */
class Color extends Enum {
    protected $allow = ['RED', 'GREEN', 'BLUE'];
}

$red = Color::RED();
$red2 = Color::RED();
$green = Color::GREEN();

var_dump($red === $red2);
var_dump($red == $red2);
var_dump($red === $green);
var_dump($red == $green);
var_dump((string) $red);
var_dump((string) $green);

$geern = Color::GEERN(); // Intentional typo. Throws.

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: bool(true) bool(true) bool(false) bool(false) string(3) "RED" string(5) "GREEN" Fatal error: Uncaught TypeError: Undefined enum Color::GEERN() in /in/bc8OW:9 Stack trace: #0 /in/bc8OW(18): Enum->__construct('GEERN') #1 /in/bc8OW(51): Enum::__callStatic('GEERN', Array) #2 {main} thrown in /in/bc8OW on line 9
Process exited with code 255.
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 bool(true) bool(true) bool(false) bool(false) string(3) "RED" string(5) "GREEN" Fatal error: Uncaught TypeError: Undefined enum Color::GEERN() in /in/bc8OW:9 Stack trace: #0 /in/bc8OW(18): Enum->__construct('GEERN') #1 /in/bc8OW(51): Enum::__callStatic('GEERN', Array) #2 {main} thrown in /in/bc8OW on line 9
Process exited with code 255.

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