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<?php $array = [ ['city' => 'NewYork', 'cash' => '1000'], ['city' => 'Philadelphia', 'cash' => '2300'], ['city' => 'NewYork', 'cash' => '2000'] ]; $result = []; foreach ($array as $a) { if (!isset($result[$a['city']])) { $result[$a['city']] = $a; // store temporary city-keyed result array (avoid Notices) } else { $result[$a['city']]['cash'] += $a['cash']; // add current value to previous value } } var_export(array_values($result)); // remove temporary keys
Output for 8.0.1 - 8.0.30, 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 ( 'city' => 'NewYork', 'cash' => 3000, ), 1 => array ( 'city' => 'Philadelphia', 'cash' => '2300', ), )
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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96.87 ms | 407 KiB | 5 Q