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<?php $x = ["Alice", "Bob", "Carol", "Dan", "Eve", "Frank", "Grace", "Heidi"]; $k = 4; $y = array_intersect_key($x, array_flip(array_rand($x, $k))); print_r($y);
Output for 7.0.0, 7.0.4, 7.2.9
Array ( [1] => Bob [2] => Carol [4] => Eve [5] => Frank )
Output for 7.2.3 - 7.2.5, 7.2.8
Array ( [0] => Alice [2] => Carol [4] => Eve [5] => Frank )
Output for 5.4.12, 7.1.12, 7.2.7
Array ( [0] => Alice [1] => Bob [6] => Grace [7] => Heidi )
Output for 5.6.17, 7.2.6
Array ( [3] => Dan [5] => Frank [6] => Grace [7] => Heidi )
Output for 5.6.15, 7.2.2
Array ( [0] => Alice [2] => Carol [3] => Dan [4] => Eve )
Output for 5.4.11, 5.5.6, 7.0.26, 7.1.4, 7.2.1
Array ( [0] => Alice [1] => Bob [2] => Carol [4] => Eve )
Output for 5.4.31 - 5.4.32, 5.5.21, 5.5.30, 7.0.23, 7.1.16, 7.2.0
Array ( [0] => Alice [2] => Carol [4] => Eve [6] => Grace )
Output for 5.4.26, 7.1.8, 7.1.21
Array ( [1] => Bob [2] => Carol [4] => Eve [6] => Grace )
Output for 5.4.4, 5.4.10, 5.4.24, 5.4.30, 5.6.30, 7.1.20
Array ( [1] => Bob [2] => Carol [5] => Frank [6] => Grace )
Output for 5.4.33, 5.6.28, 7.0.10, 7.1.3, 7.1.19
Array ( [1] => Bob [2] => Carol [4] => Eve [7] => Heidi )
Output for 7.1.18
Array ( [0] => Alice [2] => Carol [3] => Dan [5] => Frank )
Output for 5.4.28, 5.5.2, 5.5.33, 5.5.36, 5.6.22, 7.1.17
Array ( [0] => Alice [3] => Dan [4] => Eve [5] => Frank )
Output for 5.4.42, 5.5.19, 5.5.25, 7.1.11, 7.1.15
Array ( [0] => Alice [1] => Bob [4] => Eve [7] => Heidi )
Output for 5.4.35, 5.5.23, 7.0.1, 7.1.14
Array ( [0] => Alice [2] => Carol [6] => Grace [7] => Heidi )
Output for 5.6.16, 7.0.5, 7.0.31, 7.1.13
Array ( [0] => Alice [3] => Dan [4] => Eve [6] => Grace )
Output for 7.1.10
Array ( [0] => Alice [1] => Bob [2] => Carol [6] => Grace )
Output for 5.4.18, 5.5.22, 7.0.19, 7.1.9
Array ( [2] => Carol [3] => Dan [6] => Grace [7] => Heidi )
Output for 5.4.38, 7.1.5, 7.1.7
Array ( [0] => Alice [2] => Carol [5] => Frank [6] => Grace )
Output for 5.6.1, 7.1.6
Array ( [0] => Alice [5] => Frank [6] => Grace [7] => Heidi )
Output for 5.4.41, 5.5.38, 7.1.2
Array ( [1] => Bob [4] => Eve [5] => Frank [7] => Heidi )
Output for 5.5.14, 7.1.0 - 7.1.1
Array ( [0] => Alice [1] => Bob [2] => Carol [7] => Heidi )
Output for 5.6.0, 7.0.30
Array ( [0] => Alice [1] => Bob [4] => Eve [5] => Frank )
Output for 5.6.13, 7.0.29
Array ( [2] => Carol [3] => Dan [5] => Frank [6] => Grace )
Output for 5.5.8, 5.6.10, 7.0.22, 7.0.28
Array ( [2] => Carol [3] => Dan [4] => Eve [5] => Frank )
Output for 7.0.27
Array ( [0] => Alice [1] => Bob [2] => Carol [5] => Frank )
Output for 7.0.12, 7.0.25
Array ( [4] => Eve [5] => Frank [6] => Grace [7] => Heidi )
Output for 5.4.9, 5.4.17, 5.4.21, 5.4.43, 5.5.7, 5.5.35, 7.0.24
Array ( [1] => Bob [3] => Dan [4] => Eve [7] => Heidi )
Output for 5.6.3, 7.0.21
Array ( [0] => Alice [4] => Eve [5] => Frank [7] => Heidi )
Output for 5.5.1, 7.0.9, 7.0.20
Array ( [1] => Bob [2] => Carol [3] => Dan [7] => Heidi )
Output for 5.4.14, 5.6.2, 7.0.18
Array ( [2] => Carol [4] => Eve [6] => Grace [7] => Heidi )
Output for 7.0.17
Array ( [2] => Carol [3] => Dan [5] => Frank [7] => Heidi )
Output for 5.6.7, 7.0.16
Array ( [0] => Alice [4] => Eve [5] => Frank [6] => Grace )
Output for 5.6.27, 7.0.15
Array ( [1] => Bob [3] => Dan [5] => Frank [7] => Heidi )
Output for 5.4.22, 5.4.37, 7.0.14
Array ( [2] => Carol [4] => Eve [5] => Frank [7] => Heidi )
Output for 5.4.25, 7.0.13
Array ( [2] => Carol [4] => Eve [5] => Frank [6] => Grace )
Output for 7.0.11
Array ( [0] => Alice [3] => Dan [6] => Grace [7] => Heidi )
Output for 7.0.8
Array ( [0] => Alice [2] => Carol [4] => Eve [7] => Heidi )
Output for 5.5.9, 5.5.28, 7.0.7
Array ( [0] => Alice [1] => Bob [2] => Carol [3] => Dan )
Output for 5.5.17 - 5.5.18, 5.5.31, 7.0.6
Array ( [0] => Alice [1] => Bob [3] => Dan [5] => Frank )
Output for 5.4.5, 7.0.3
Array ( [0] => Alice [2] => Carol [3] => Dan [6] => Grace )
Output for 5.4.1, 5.5.20, 5.5.32, 7.0.2
Array ( [2] => Carol [3] => Dan [4] => Eve [6] => Grace )
Output for 5.5.27, 5.6.29
Array ( [0] => Alice [3] => Dan [5] => Frank [7] => Heidi )
Output for 5.6.21, 5.6.26
Array ( [2] => Carol [5] => Frank [6] => Grace [7] => Heidi )
Output for 5.4.8, 5.4.20, 5.6.25
Array ( [1] => Bob [5] => Frank [6] => Grace [7] => Heidi )
Output for 5.6.6, 5.6.24
Array ( [0] => Alice [4] => Eve [6] => Grace [7] => Heidi )
Output for 5.6.23
Array ( [3] => Dan [4] => Eve [5] => Frank [7] => Heidi )
Output for 5.4.6, 5.4.13, 5.5.16, 5.6.20
Array ( [0] => Alice [3] => Dan [5] => Frank [6] => Grace )
Output for 5.4.23, 5.4.29, 5.6.4, 5.6.19
Array ( [2] => Carol [3] => Dan [4] => Eve [7] => Heidi )
Output for 5.6.18
Array ( [3] => Dan [4] => Eve [5] => Frank [6] => Grace )
Output for 5.4.16, 5.6.14
Array ( [3] => Dan [4] => Eve [6] => Grace [7] => Heidi )
Output for 5.4.19, 5.4.27, 5.6.12
Array ( [1] => Bob [3] => Dan [6] => Grace [7] => Heidi )
Output for 5.6.11
Array ( [0] => Alice [1] => Bob [5] => Frank [6] => Grace )
Output for 5.4.3, 5.4.15, 5.6.9
Array ( [1] => Bob [4] => Eve [6] => Grace [7] => Heidi )
Output for 5.6.8
Array ( [1] => Bob [4] => Eve [5] => Frank [6] => Grace )
Output for 5.5.0, 5.5.5, 5.6.5
Array ( [1] => Bob [2] => Carol [3] => Dan [4] => Eve )
Output for 5.5.37
Array ( [1] => Bob [2] => Carol [3] => Dan [5] => Frank )
Output for 5.5.34
Array ( [1] => Bob [2] => Carol [6] => Grace [7] => Heidi )
Output for 5.5.29
Array ( [1] => Bob [2] => Carol [3] => Dan [6] => Grace )
Output for 5.5.10, 5.5.26
Array ( [1] => Bob [3] => Dan [4] => Eve [6] => Grace )
Output for 5.4.0, 5.4.39, 5.5.12, 5.5.24
Array ( [0] => Alice [1] => Bob [5] => Frank [7] => Heidi )
Output for 5.5.15
Array ( [0] => Alice [1] => Bob [3] => Dan [4] => Eve )
Output for 5.5.13
Array ( [0] => Alice [1] => Bob [3] => Dan [7] => Heidi )
Output for 5.5.11
Array ( [0] => Alice [3] => Dan [4] => Eve [7] => Heidi )
Output for 5.5.4
Array ( [0] => Alice [1] => Bob [3] => Dan [6] => Grace )
Output for 5.5.3
Array ( [1] => Bob [2] => Carol [5] => Frank [7] => Heidi )
Output for 5.4.36, 5.4.45
Array ( [0] => Alice [2] => Carol [3] => Dan [7] => Heidi )
Output for 5.4.44
Array ( [1] => Bob [3] => Dan [4] => Eve [5] => Frank )
Output for 5.4.7, 5.4.34, 5.4.40
Array ( [0] => Alice [1] => Bob [4] => Eve [6] => Grace )
Output for 5.4.2
Array ( [0] => Alice [2] => Carol [5] => Frank [7] => Heidi )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/AOS83 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/AOS83 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/AOS83 on line 3
Process exited with code 255.