3v4l.org

run code in 300+ PHP versions simultaneously
<?php class UString { private $string = null; public function __construct(string $string) { $this->string = $string; } public function __toString() { return $this->string; } } echo strlen(new Ustring('Class with __string method !'));
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.6 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
28
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.36, 5.6.0 - 5.6.28
Catchable fatal error: Argument 1 passed to UString::__construct() must be an instance of string, string given, called in /in/vbJ4u on line 18 and defined in /in/vbJ4u on line 7
Process exited with code 255.
preferences:
281.05 ms | 402 KiB | 291 Q