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<?php // First Array $a = [ [ "sales" => [ ["Date" => "2014-04-01", "Units" => 1], ["Date" => "2014-04-02", "Units" => 7] ] ] ]; $b = [ [ "sales" => [ ["Date" => "2014-04-01", "Units" => 3], ["Date" => "2014-04-02", "Units" => 2] ] ] ]; $c = [ [ "sales" => [ ["Date" => "2014-04-01", "Units" => 0], ["Date" => "2014-04-02", "Units" => 5] ] ] ]; $result = []; foreach (array_merge($a[0]['sales'], $b[0]['sales'], $c[0]['sales']) as $row) { if (!isset($ref[$row['Date']])) { $ref[$row['Date']] = $row; $result[] =& $ref[$row['Date']]; } else { $ref[$row['Date']]['Units'] += $row['Units']; } } var_export($result);
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14, 8.5.0
array ( 0 => array ( 'Date' => '2014-04-01', 'Units' => 4, ), 1 => array ( 'Date' => '2014-04-02', 'Units' => 14, ), )
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.
Output for 8.3.28
/bin/php-8.3.28: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.3.28) /bin/php-8.3.28: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.3.28) /bin/php-8.3.28: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.3.28) /bin/php-8.3.28: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.3.28)
Process exited with code 1.
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