Joining - Merge Multidimentional Array with a key value as identifier in PHP -

[{     "title" = > "ceo",         "name" = > "george",         "columns" = > [{         "display_name" = > "salary",         "value" = > "3.85",     }, {         "display_name" = > "bonus",         "value" = > "994.19",     }, {         "display_name" = > "increment",         "value" = > "8.15",     }] }]   data2 = [{     "title" = > "ceo",         "name" = > "george",         "columns" = > [{         "display_name" = > "address",         "value" = > "albany",     }, {         "display_name" = > "phone",         "value" = > "47123",     }, {         "display_name" = > "mobile",         "value" = > "784123",     }] }] 

i have above 2 arrays, want join values inside columns 1 array, if conditions met name = george in both hashes.

the required output this:

[{     "title" = > "ceo",         "name" = > "george",         "columns" = > [{         "display_name" = > "salary",         "value" = > "3.85",     }, {         "display_name" = > "bonus",             "value" = > "994.19",     }, {         "display_name" = > "increment",         "value" = > "8.15",     }, {         "display_name" = > "address",         "value" = > "albany",     }, {         "display_name" = > "phone",         "value" = > "47123",     }, {         "display_name" = > "mobile",         "value" = > "784123",     }] }] 

"name"=>"george" - identifier? or matcher? id name in both same dump value of columns joint array hash.

made function you:

<?php     function array_merge_on_key($original, $new, $key){         if(is_array($original) && is_array($new)){             $copy_from = array();             if(array_key_exists($key, $new)){                 if(is_array($new[$key])){                     $copy_from = $new[$key];                 }             }             return is_null($copy_from) ? array_merge($original[$key], $copy_from) : $original;         }         return false;     }