Merge two array and give them new keys

test.php

 <?php 
public function test(){
        $array  =[0=> [ "organisation_name" => "HERTFORDSHIRE LIMITED",
            "company_number" => "06124924",
            "address" => " Schopwick Place,  High Street,  Elstree,  Hertfordshire,  England,  WD6 3SW",
            "company_status" => "active",
            "company_type" => "ltd",
            "date_of_incorporation" => "2007-02-23",
            "nature_of_business" => "70100",
            "town" => "Elstree"]];

        $array2=[1=>[
            "organisation_name" => "ACACIAS CONSULTING LTD",
            "company_number" => "10715824",
            "address" => " 2 Claridge Court,  Lower Kings Road,  Berkhamsted,   United Kingdom,  HP4 2AF",
            "company_status" => "active",
            "company_type" => "ltd",
            "date_of_incorporation" => "2017-04-07",
            "nature_of_business" => "70229",
            "town" => "Berkhamsted"
        ]];

    $merge = array_merge($array,$array2);

    dd($merge);
    }

Had to give them keys