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<?php function get_caller(): ?object { foreach (debug_backtrace() as $call) { if (isset($call['object'])) { return $call['object']; } } return null; } function foo(): void { var_dump(get_caller()); } class Bar { public function __construct() { var_dump(get_caller()); new Baz(); } } class Baz { public function __construct() { foo(); } } foo(); new Bar();
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.30, 8.0.0 - 8.0.20, 8.1.0 - 8.1.7
NULL object(Bar)#1 (0) { } object(Baz)#2 (0) { }
Output for 7.1.0 - 7.1.25
NULL Fatal error: Uncaught TypeError: Return value of get_caller() must be an instance of object or null, instance of Bar returned in /in/6WG9i:7 Stack trace: #0 /in/6WG9i(23): get_caller() #1 /in/6WG9i(38): Bar->__construct() #2 {main} thrown in /in/6WG9i on line 7
Process exited with code 255.

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