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<?php $a = [ ['ID' => 1, 'Count' => 2], ]; $b = [ ['ID' => 1, 'Count' => 4], ['ID' => 2, 'Count' => 3] ]; $result = []; foreach (array_merge($a, $b) as $row) { if (!isset($result[$row['ID']])) { $result[$row['ID']] = $row; } else { $result[$row['ID']]['Count'] += $row['Count']; } } var_export(array_values($result));
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.4, 8.3.6 - 8.3.25, 8.4.1 - 8.4.12
array ( 0 => array ( 'ID' => 1, 'Count' => 6, ), 1 => array ( 'ID' => 2, 'Count' => 3, ), )
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 ( 0 => array ( 'ID' => 1, 'Count' => 6, ), 1 => array ( 'ID' => 2, 'Count' => 3, ), )

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146.09 ms | 408 KiB | 5 Q