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<?php unset($this); class Foo{ private static $this; protected $a = true; public function __construct(){ self::$this = new Foo(); echo "From Foo()"; } public static function init(){ //var_dump(new Foo); //var_dump(self::$this); echo "From Foo::init()"; } public function test(){ echo "called from static"; } } Foo::init();
Output for 7.1.0 - 7.1.17, 7.1.21 - 7.1.33, 7.2.0 - 7.2.6, 7.2.8, 7.2.10 - 7.2.26, 7.3.0 - 7.3.13, 7.4.0 - 7.4.1, 8.1.24 - 8.1.28, 8.2.11 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Cannot unset $this in /in/dR7Cs on line 2
Process exited with code 255.
Output for 5.6.6, 5.6.9, 5.6.14, 5.6.25, 5.6.32 - 5.6.34, 7.0.4, 7.0.19, 7.0.24, 7.1.18 - 7.1.20, 7.2.7, 7.2.9

Process exited with code 137.
Output for 5.4.22 - 5.4.45, 5.5.6 - 5.5.38, 5.6.0 - 5.6.5, 5.6.7 - 5.6.8, 5.6.10 - 5.6.13, 5.6.15 - 5.6.24, 5.6.26 - 5.6.31, 5.6.35 - 5.6.40, 7.0.0 - 7.0.3, 7.0.5 - 7.0.18, 7.0.20 - 7.0.23, 7.0.25 - 7.0.33
From Foo::init()
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.21, 5.5.0 - 5.5.5
Fatal error: Cannot re-assign $this in /in/dR7Cs on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/dR7Cs on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/dR7Cs on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/dR7Cs on line 4
Process exited with code 255.
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235.45 ms | 401 KiB | 345 Q