Online PHP editor | perf for ePil6

<?php $person = [ 'id' => '123', 'name' => 'John Doe', 'relationship_status' => 'Married', 'work_profession' => 'Teacher', 'work_salary' => '1500', 'work_status' => 'Working', 'work_place' => 'Lorem City School', 'from_province' => 'Dolor Sit Province', 'from_city_name' => 'Ipsum City', 'from_city_address' => 'Some Rd. 1337' ]; function reShapeArray(array $arr): array { $return = []; foreach ($arr as $key => $value) { $firstUnderscore = strpos($key, '_'); if ($firstUnderscore === false) { // already at the lowest level, simply return as is $return[$key] = $value; } else { // there's an underscore, dig into this [$top, $sub] = explode('_', $key, 2); $return[$top] = array_merge_recursive($return[$top] ?? [], reShapeArray([$sub => $value])); } } return $return; } function mergeSingleElementArrays(array $arr): array { $return = []; foreach ($arr as $key => $value) { if (is_array($value) && count($value) === 1) { $subKey = array_key_first($value); $return["{$key}_{$subKey}"] = $value[$subKey]; } else { $return[$key] = $value; } } return $return; } $tests = [ 'deep array with single prefixed key' => [ ['a_b_c_d' => 'foo', 'a_b_e' => 'bar',], ['a_b' => ['c' => ['d' => 'foo'], 'e' => 'bar']], ], 'single prefixed key' => [['a_b' => 'foo'], ['a_b' => 'foo']], 'standard' => [ $person, [ 'id' => '123', 'name' => 'John Doe', 'relationship_status' => 'Married', 'work' => [ 'profession' => 'Teacher', 'salary' => '1500', 'status' => 'Working', 'place' => 'Lorem City School', ], 'from' => [ 'province' => 'Dolor Sit Province', 'city' => [ 'name' => 'Ipsum City', 'address' => 'Some Rd. 1337', ], ], ], ], ]; $errors = []; foreach ($tests as $name => [$input, $expected]) { $result = reShapeArray($input); $foo = mergeSingleElementArrays($result); if ($foo !== $expected) { $errors[] = "Test '$name' failed: got " . json_encode($foo) . ' vs expected ' . json_encode($expected); } } if ($errors) { var_dump($errors); } else { echo "All tests passed\n"; }

Version	System time (s)	User time (s)	Memory (MiB)
8.5.1	0.011	0.009	16.65
8.5.0	0.015	0.006	20.16
8.4.15	0.001	0.001	14.05
8.4.14	0.013	0.009	17.68
8.4.13	0.010	0.010	18.66
8.4.12	0.006	0.004	24.19
8.4.11	0.012	0.008	18.88
8.4.10	0.014	0.007	18.79
8.4.9	0.012	0.005	20.72
8.4.8	0.012	0.008	19.02
8.4.7	0.010	0.006	17.86
8.4.6	0.011	0.011	17.55
8.4.5	0.005	0.004	17.89
8.4.4	0.010	0.010	17.86
8.4.3	0.003	0.010	18.77
8.4.2	0.012	0.003	17.75
8.4.1	0.019	0.000	19.42
8.3.28	0.012	0.009	18.36
8.3.27	0.011	0.009	16.52
8.3.26	0.010	0.009	16.57
8.3.25	0.012	0.006	19.11
8.3.24	0.010	0.009	17.04
8.3.23	0.008	0.005	16.82
8.3.22	0.009	0.009	18.84
8.3.21	0.009	0.010	16.88
8.3.20	0.013	0.007	16.50
8.3.19	0.009	0.010	16.65
8.3.18	0.012	0.006	18.36
8.3.17	0.006	0.009	20.75
8.3.16	0.010	0.010	17.26
8.3.15	0.008	0.000	18.99
8.3.14	0.016	0.003	16.48
8.3.13	0.008	0.000	16.72
8.3.12	0.003	0.006	20.74
8.3.11	0.006	0.003	16.39
8.3.10	0.003	0.006	16.77
8.3.9	0.009	0.000	26.77
8.3.8	0.008	0.000	16.50
8.3.7	0.016	0.000	16.58
8.3.6	0.000	0.015	18.59
8.3.5	0.004	0.011	16.52
8.3.4	0.010	0.007	21.75
8.3.3	0.004	0.011	22.14
8.3.2	0.003	0.005	25.66
8.3.1	0.004	0.004	25.66
8.2.29	0.012	0.004	20.34
8.2.28	0.010	0.009	18.37
8.2.27	0.004	0.004	20.25
8.2.26	0.004	0.004	17.26
8.2.25	0.008	0.000	18.36
8.2.24	0.008	0.008	16.50
8.2.23	0.004	0.004	20.94
8.2.22	0.011	0.007	24.06
8.2.21	0.008	0.003	26.77
8.2.20	0.008	0.004	18.16
8.2.19	0.014	0.000	18.29
8.2.18	0.012	0.009	25.92
8.2.17	0.004	0.011	22.96
8.2.16	0.004	0.012	22.96
8.2.15	0.012	0.007	25.66
8.2.14	0.010	0.007	25.66
8.1.33	0.011	0.008	21.98
8.1.32	0.009	0.006	16.39
8.1.31	0.000	0.008	16.75
8.1.30	0.015	0.004	16.43
8.1.29	0.003	0.006	30.84
8.1.28	0.006	0.009	25.92
8.1.27	0.000	0.007	25.66

Version

System time (s)

User time (s)

Memory (MiB)

8.5.1

0.011

0.009

16.65

8.5.0

0.015

0.006

20.16

8.4.15

0.001

14.05

8.4.14

0.013

0.009

17.68

8.4.13

0.010

18.66

8.4.12

0.006

0.004

24.19

8.4.11

0.012

0.008

18.88

8.4.10

0.014

0.007

18.79

8.4.9

0.012

0.005

20.72

8.4.8

0.012

0.008

19.02

8.4.7

0.010

0.006

17.86

8.4.6

0.011

17.55

8.4.5

0.005

0.004

17.89

8.4.4

0.010

17.86

8.4.3

0.003

0.010

18.77

8.4.2

0.012

0.003

17.75

8.4.1

0.019

0.000

19.42

8.3.28

0.012

0.009

18.36

8.3.27

0.011

0.009

16.52

8.3.26

0.010

0.009

16.57

8.3.25

0.012

0.006

19.11

8.3.24

0.010

0.009

17.04

8.3.23

0.008

0.005

16.82

8.3.22

0.009

18.84

8.3.21

0.009

0.010

16.88

8.3.20

0.013

0.007

16.50

8.3.19

0.009

0.010

16.65

8.3.18

0.012

0.006

18.36

8.3.17

0.006

0.009

20.75

8.3.16

0.010

17.26

8.3.15

0.008

0.000

18.99

8.3.14

0.016

0.003

16.48

8.3.13

0.008

0.000

16.72

8.3.12

0.003

0.006

20.74

8.3.11

0.006

0.003

16.39

8.3.10

0.003

0.006

16.77

8.3.9

0.009

0.000

26.77

8.3.8

0.008

0.000

16.50

8.3.7

0.016

0.000

16.58

8.3.6

0.000

0.015

18.59

8.3.5

0.004

0.011

16.52

8.3.4

0.010

0.007

21.75

8.3.3

0.004

0.011

22.14

8.3.2

0.003

0.005

25.66

8.3.1

0.004

25.66

8.2.29

0.012

0.004

20.34

8.2.28

0.010

0.009

18.37

8.2.27

0.004

20.25

8.2.26

0.004

17.26

8.2.25

0.008

0.000

18.36

8.2.24

0.008

16.50

8.2.23

0.004

20.94

8.2.22

0.011

0.007

24.06

8.2.21

0.008

0.003

26.77

8.2.20

0.008

0.004

18.16

8.2.19

0.014

0.000

18.29

8.2.18

0.012

0.009

25.92

8.2.17

0.004

0.011

22.96

8.2.16

0.004

0.012

22.96

8.2.15

0.012

0.007

25.66

8.2.14

0.010

0.007

25.66

8.1.33

0.011

0.008

21.98

8.1.32

0.009

0.006

16.39

8.1.31

0.000

0.008

16.75

8.1.30

0.015

0.004

16.43

8.1.29

0.003

0.006

30.84

8.1.28

0.006

0.009

25.92

8.1.27

0.000

0.007

25.66