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<?php class RecursionDetector { private array $obj_ref_stack = []; private array $arr_ref_stack = []; public function detect(&$val): bool { switch (gettype($val)) { case 'object': $hash = spl_object_hash($val); var_dump($hash); if (isset($this->obj_ref_stack[$hash])) { debug_print_backtrace(); return true; } $this->obj_ref_stack[$hash] = true; $copy = (array) $val; break; case 'array': $ref = ReflectionReference::fromArrayElement([&$var], 0)->getId(); if (isset($this->arr_ref_stack[$ref])) { debug_print_backtrace(); return true; } $this->arr_ref_stack[$ref] = true; $copy = $val; break; default: return false; } $recurse = false; foreach ($copy as $k => $_) { if ($this->detect($copy[$k])) { $recurse = true; break; } } switch (gettype($val)) { case 'object': unset($this->obj_ref_stack[$hash]); break; case 'array': unset($this->arr_ref_stack[$ref]); break; } return $recurse; } } $d = new RecursionDetector(); class X { public array $y = []; } $x = new X(); $r = new ReflectionClass('X'); $z = $r->newLazyProxy(fn() => $x); $x->y[] = [[$z]]; $_ = $z->y; var_dump($x, $z); var_dump($d->detect($x)); var_dump($d->detect($z));

Version	System time (s)	User time (s)	Memory (MiB)
8.4.13	0.005	0.005	17.63
8.4.12	0.009	0.011	20.75
8.4.11	0.012	0.009	22.68
8.4.10	0.015	0.006	18.01
8.4.9	0.013	0.008	18.57
8.4.8	0.012	0.009	19.58
8.4.7	0.010	0.008	17.90
8.4.6	0.014	0.005	19.05
8.4.5	0.015	0.006	18.93
8.4.4	0.013	0.007	17.61
8.4.3	0.008	0.000	20.85
8.4.2	0.012	0.009	21.16
8.4.1	0.027	0.008	17.65
8.3.26	0.013	0.006	16.84
8.3.25	0.013	0.006	18.80
8.3.24	0.013	0.006	16.75
8.3.23	0.011	0.007	16.86
8.3.22	0.011	0.008	17.23
8.3.21	0.010	0.009	16.66
8.3.20	0.007	0.002	16.39
8.3.19	0.013	0.006	17.13
8.3.18	0.006	0.013	16.46
8.3.17	0.006	0.006	17.00
8.3.16	0.009	0.009	16.76
8.3.15	0.015	0.003	17.11
8.3.14	0.003	0.015	16.63
8.3.13	0.003	0.005	16.76
8.3.5	0.007	0.010	16.55
8.2.29	0.003	0.005	20.36
8.2.28	0.015	0.007	18.49
8.2.27	0.011	0.007	16.73
8.2.26	0.009	0.009	17.00
8.2.25	0.004	0.004	16.80
8.1.32	0.009	0.010	16.18

Version

System time (s)

User time (s)

Memory (MiB)

8.4.13

0.005

17.63

8.4.12

0.009

0.011

20.75

8.4.11

0.012

0.009

22.68

8.4.10

0.015

0.006

18.01

8.4.9

0.013

0.008

18.57

8.4.8

0.012

0.009

19.58

8.4.7

0.010

0.008

17.90

8.4.6

0.014

0.005

19.05

8.4.5

0.015

0.006

18.93

8.4.4

0.013

0.007

17.61

8.4.3

0.008

0.000

20.85

8.4.2

0.012

0.009

21.16

8.4.1

0.027

0.008

17.65

8.3.26

0.013

0.006

16.84

8.3.25

0.013

0.006

18.80

8.3.24

0.013

0.006

16.75

8.3.23

0.011

0.007

16.86

8.3.22

0.011

0.008

17.23

8.3.21

0.010

0.009

16.66

8.3.20

0.007

0.002

16.39

8.3.19

0.013

0.006

17.13

8.3.18

0.006

0.013

16.46

8.3.17

0.006

17.00

8.3.16

0.009

16.76

8.3.15

0.015

0.003

17.11

8.3.14

0.003

0.015

16.63

8.3.13

0.003

0.005

16.76

8.3.5

0.007

0.010

16.55

8.2.29

0.003

0.005

20.36

8.2.28

0.015

0.007

18.49

8.2.27

0.011

0.007

16.73

8.2.26

0.009

17.00

8.2.25

0.004

16.80

8.1.32

0.009

0.010

16.18