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<?php $records = [ 'nonsense', 'f', 'h', 1, 2, 3, 4, 'f', 'nonsense', 'h', 1, 2, 'f', 'h', 1, 2, 3, 'f', 'nonsense', 'nonsense', 'nonsense', 'h', 1, 2, 3, 4, 'f', 'h', 1, 'f', 'nonsense' ]; $groups = []; foreach ($records as $record) { if ($record === 'h') { $group = []; } $group[] = $record; if ($record === 'f') { $groups[] = $group; } } var_dump($groups); echo "\n------------------------------------------------------\n\n"; unset($group); $groups = []; foreach ($records as $record) { if ($record === 'h') { $group = []; } if (! isset($group)) { continue; } $group[] = $record; if ($record === 'f') { $groups[] = $group; unset($group); } } var_dump($groups);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.5 - 7.2.33, 7.3.16 - 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 - 8.3.4, 8.3.6
array(6) { [0]=> array(2) { [0]=> string(8) "nonsense" [1]=> string(1) "f" } [1]=> array(6) { [0]=> string(1) "h" [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> int(4) [5]=> string(1) "f" } [2]=> array(4) { [0]=> string(1) "h" [1]=> int(1) [2]=> int(2) [3]=> string(1) "f" } [3]=> array(5) { [0]=> string(1) "h" [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> string(1) "f" } [4]=> array(6) { [0]=> string(1) "h" [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> int(4) [5]=> string(1) "f" } [5]=> array(3) { [0]=> string(1) "h" [1]=> int(1) [2]=> string(1) "f" } } ------------------------------------------------------ array(5) { [0]=> array(6) { [0]=> string(1) "h" [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> int(4) [5]=> string(1) "f" } [1]=> array(4) { [0]=> string(1) "h" [1]=> int(1) [2]=> int(2) [3]=> string(1) "f" } [2]=> array(5) { [0]=> string(1) "h" [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> string(1) "f" } [3]=> array(6) { [0]=> string(1) "h" [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> int(4) [5]=> string(1) "f" } [4]=> array(3) { [0]=> string(1) "h" [1]=> int(1) [2]=> string(1) "f" } }
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(6) { [0]=> array(2) { [0]=> string(8) "nonsense" [1]=> string(1) "f" } [1]=> array(6) { [0]=> string(1) "h" [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> int(4) [5]=> string(1) "f" } [2]=> array(4) { [0]=> string(1) "h" [1]=> int(1) [2]=> int(2) [3]=> string(1) "f" } [3]=> array(5) { [0]=> string(1) "h" [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> string(1) "f" } [4]=> array(6) { [0]=> string(1) "h" [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> int(4) [5]=> string(1) "f" } [5]=> array(3) { [0]=> string(1) "h" [1]=> int(1) [2]=> string(1) "f" } } ------------------------------------------------------ array(5) { [0]=> array(6) { [0]=> string(1) "h" [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> int(4) [5]=> string(1) "f" } [1]=> array(4) { [0]=> string(1) "h" [1]=> int(1) [2]=> int(2) [3]=> string(1) "f" } [2]=> array(5) { [0]=> string(1) "h" [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> string(1) "f" } [3]=> array(6) { [0]=> string(1) "h" [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> int(4) [5]=> string(1) "f" } [4]=> array(3) { [0]=> string(1) "h" [1]=> int(1) [2]=> string(1) "f" } }

preferences:
134.57 ms | 405 KiB | 173 Q