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<?php function find_group($cond, &$arr, $e = null) { if ($cond($e, reset($arr) || $e === null)) { $e = array_shift($arr); return array_merge([$e], find_group($cond, $arr, $e)); } return []; } function array_group($cond, $arr) { if (empty($arr)) return []; /*while($cond($e, reset($arr))) { $g[] = array_shift($arr); }*/ return array_merge([find_group($arr)], array_group($cond, $arr)); } function it($m,$p){echo ($p?'OK':'NO')." It $m\n";} function eq($a,$b) {return $a==$b;} echo it ('groups', array_group('eq', [1,5,5,6,6,6,7,9]) == [[1],[5,5],[6,6,6],[7],[9]]); echo it ('groups by comparing with first item of each group', array_group(function ($a, $b) { return ($a == ($b-1)) || ($a==$b); }, [1,1,2,3,1]) == [[1,1,2],[3],[1]]); echo it ('groups by comparing with first item of each group', array_group(function ($a, $b) { return ($a == ($b-1)) || ($a==$b); }, [1,1,2,1,3,1]) == [[1,1,2,1],[3],[1]]);
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Fatal error: Uncaught ArgumentCountError: Too few arguments to function find_group(), 1 passed in /in/2evU7 on line 23 and at least 2 expected in /in/2evU7:3 Stack trace: #0 /in/2evU7(23): find_group(Array) #1 /in/2evU7(30): array_group('eq', Array) #2 {main} thrown in /in/2evU7 on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.33
Warning: Missing argument 2 for find_group(), called in /in/2evU7 on line 23 and defined in /in/2evU7 on line 3 Fatal error: Uncaught Error: Function name must be a string in /in/2evU7:5 Stack trace: #0 /in/2evU7(23): find_group(Array) #1 /in/2evU7(30): array_group('eq', Array) #2 {main} thrown in /in/2evU7 on line 5
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Warning: Missing argument 2 for find_group(), called in /in/2evU7 on line 23 and defined in /in/2evU7 on line 3 Fatal error: Function name must be a string in /in/2evU7 on line 5
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/2evU7 on line 8
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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/2evU7 on line 8
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/2evU7 on line 8
Process exited with code 255.
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