FInding duplicate value in PHP array -

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this question has answer here:

   [0] => array         (             [id] => 9             [order_address_id] => 9             [created] => 2015-12-17 12:24:20             [order_status] => dispatched             [total_discount] =>              [total_shipping_charge] => 60             [s_state] => ny             [b_state] => ny             [order_id] => 9             [p_name] => product 1             [qty] => 1             [price] => 475         )      [1] => array         (             [id] => 9             [order_address_id] => 9             [created] => 2015-12-17 12:24:20             [order_status] => dispatched             [total_discount] =>              [total_shipping_charge] => 60             [s_state] => ma             [b_state] => ma             [order_id] => 9             [p_name] => product 2             [qty] => 1             [price] => 349         )

i want find if array same id repeats have delete total_shipping_charge second , subsequent array having same id. how can in php?

i use array_walk this.

first, want create callback function checks if id has been encountered, , unsets total_shipping_charge if has, like

function shipping_charge_walk(&$entry, $key, &$found_ids) {   if (in_array($entry['id'], $found_ids)) {     unset($entry['total_shipping_charge']);   } else {     $found_ids[] = $entry['id'];   } }

this takes $found_ids reference, can append encountered ids it, , takes $entry reference can unset member of it.

then, call array walk on array.

$found_ids = array(); array_walk($arr, 'shipping_charge_walk', $found_ids);

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