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<?php $a1 = [ ['id' => 5, 'cnt' => 14], ['id' => 8, 'cnt' => 2], ]; $a2 = [ ['id' => 8, 'binding' => 'hardcover'], ['id' => 5, 'binding' => 'softcover'], ]; $result = []; foreach (array_merge($a1, $a2) as $row) { $result[$row['id']] = ($result[$row['id']] ?? []) + $row; } var_export(array_values($result));
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0
array ( 0 => array ( 'id' => 5, 'cnt' => 14, 'binding' => 'softcover', ), 1 => array ( 'id' => 8, 'cnt' => 2, 'binding' => 'hardcover', ), )
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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