php - Array merge with same key's dont' overwrite -


so have following 2 arrays, keys 2016 , 2017

array(2) {   [2016]=>   array(11) {     ["id"]=>     string(1) "0"     [0]=>     string(1) "0"     ["user_id"]=>     string(1) "0"     ["entry_id"]=>     int(0)     ["user_name"]=>     string(0) ""     [3]=>     string(0) ""     ["action"]=>     string(11) "banner view"     [4]=>     string(11) "banner view"     ["entry_details"]=>     string(0) ""     ["created"]=>     string(4) "2016"     ["total"]=>     int(0)   }   [2017]=>   array(11) {     ["id"]=>     string(1) "0"     [0]=>     string(1) "0"     ["user_id"]=>     string(1) "0"     ["entry_id"]=>     int(0)     ["user_name"]=>     string(0) ""     [3]=>     string(0) ""     ["action"]=>     string(11) "banner view"     [4]=>     string(11) "banner view"     ["entry_details"]=>     string(0) ""     ["created"]=>     string(4) "2017"     ["total"]=>     int(0)   } } array(1) {   [2017]=>   array(30) {     ["id"]=>     string(2) "52"     [0]=>     string(2) "52"     ["user_id"]=>     null     [1]=>     null     ["entry_id"]=>     string(1) "2"     [2]=>     string(1) "2"     ["user_name"]=>     null     [3]=>     null     ["action"]=>     string(11) "banner view"     [4]=>     string(11) "banner view"     ["entry_details"]=>     string(4) "null"     [5]=>     string(4) "null"     ["entry_type"]=>     string(6) "banner"     [6]=>     string(6) "banner"     ["created"]=>     string(19) "2017-06-21 10:25:49"     [7]=>     string(19) "2017-06-21 10:25:49"     ["ip"]=>     string(9) "127.0.0.1"     [8]=>     string(9) "127.0.0.1"     ["user_agent"]=>     string(121) "mozilla/5.0 (macintosh; intel mac os x 10_12_5) applewebkit/537.36 (khtml, gecko) chrome/58.0.3029.110 safari/537.36"     [9]=>     string(121) "mozilla/5.0 (macintosh; intel mac os x 10_12_5) applewebkit/537.36 (khtml, gecko) chrome/58.0.3029.110 safari/537.36"     ["browser"]=>     string(13) "google chrome"     [10]=>     string(13) "google chrome"     ["browser_version"]=>     string(2) "58"     [11]=>     string(2) "58"     ["os"]=>     string(28) "mac osx 10 (unknown version)"     [12]=>     string(28) "mac osx 10 (unknown version)"     ["total"]=>     string(3) "510"     [13]=>     string(3) "510"     ["date_only"]=>     string(4) "2017"     [14]=>     string(4) "2017"   } }

now, after array merge should array 2 keys of data, 2016 , 2017 instead array 3 keys, it's not overwriting array same key.

$final = array_merge($results,$results_from_db);

array(3) {   [0]=>   array(11) {     ["id"]=>     string(1) "0"     [0]=>     string(1) "0"     ["user_id"]=>     string(1) "0"     ["entry_id"]=>     int(0)     ["user_name"]=>     string(0) ""     [3]=>     string(0) ""     ["action"]=>     string(11) "banner view"     [4]=>     string(11) "banner view"     ["entry_details"]=>     string(0) ""     ["created"]=>     string(4) "2016"     ["total"]=>     int(0)   }   [1]=>   array(11) {     ["id"]=>     string(1) "0"     [0]=>     string(1) "0"     ["user_id"]=>     string(1) "0"     ["entry_id"]=>     int(0)     ["user_name"]=>     string(0) ""     [3]=>     string(0) ""     ["action"]=>     string(11) "banner view"     [4]=>     string(11) "banner view"     ["entry_details"]=>     string(0) ""     ["created"]=>     string(4) "2017"     ["total"]=>     int(0)   }   [2]=>   array(30) {     ["id"]=>     string(2) "52"     [0]=>     string(2) "52"     ["user_id"]=>     null     [1]=>     null     ["entry_id"]=>     string(1) "2"     [2]=>     string(1) "2"     ["user_name"]=>     null     [3]=>     null     ["action"]=>     string(11) "banner view"     [4]=>     string(11) "banner view"     ["entry_details"]=>     string(4) "null"     [5]=>     string(4) "null"     ["entry_type"]=>     string(6) "banner"     [6]=>     string(6) "banner"     ["created"]=>     string(19) "2017-06-21 10:25:49"     [7]=>     string(19) "2017-06-21 10:25:49"     ["ip"]=>     string(9) "127.0.0.1"     [8]=>     string(9) "127.0.0.1"     ["user_agent"]=>     string(121) "mozilla/5.0 (macintosh; intel mac os x 10_12_5) applewebkit/537.36 (khtml, gecko) chrome/58.0.3029.110 safari/537.36"     [9]=>     string(121) "mozilla/5.0 (macintosh; intel mac os x 10_12_5) applewebkit/537.36 (khtml, gecko) chrome/58.0.3029.110 safari/537.36"     ["browser"]=>     string(13) "google chrome"     [10]=>     string(13) "google chrome"     ["browser_version"]=>     string(2) "58"     [11]=>     string(2) "58"     ["os"]=>     string(28) "mac osx 10 (unknown version)"     [12]=>     string(28) "mac osx 10 (unknown version)"     ["total"]=>     string(3) "510"     [13]=>     string(3) "510"     ["date_only"]=>     string(4) "2017"     [14]=>     string(4) "2017"   } }

why happening? normal?

info: php 5.6.30 (cli) (built: feb 7 2017 16:18:37) copyright (c) 1997-2016 php group zend engine v2.6.0, copyright (c) 1998-2016 zend technologies

values in input array numeric keys renumbered incrementing keys starting 0 in result array.

http://php.net/manual/en/function.array-merge.php


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