Merging a 2 dimentional json array in PHP [closed]

Question

I have two JSON arrays with multiple elements in each array. Could someone please help to merge these two arrays in order to add the second array elements with first array in respective to their index.

First JSON array:

$json1 =
    '[
    {
    "CHEPTEL":"12001116",
    "NOM":"La Ferme de Jean-Marc et Aurélien ",
    "CODE_POSTAL":"12630",
    "VILLE":"AGEN D AVEYRON",
    "LATITUDE":"44.343518",
    "LONGITUDE":"2.716004",
    "DESCRIPTIF_FERME":""     
    },
    {
    "CHEPTEL":"12001",
    "NOM":"La Ferme ",
    "CODE_POSTAL":"12630",
    "VILLE":"AGEN D AVEYRON",
    "LATITUDE":"44.343518",
    "LONGITUDE":"2.716004",
    "DESCRIPTIF_FERME":""
    }
    ]';
    

Second JSON array:

$json2= '[
    {
    "DEMA_CODE":"08-93",
    "ANNEE_ADHESION":"2016",
    "RACE_MERES":"Limousine",
    "DESCRIPTIF_ATELIER":""
    },
    {
    "DEMA_CODE":"08-93",
    "ANNEE_ADHESION":"2016",
    "RACE_MERES":"Limousine",
    "DESCRIPTIF_ATELIER":""
    }
    ]';
    

Finally I want to have the array to be this:

$newarray= '[
{
"CHEPTEL":"12001116",
"NOM":"La Ferme de Jean-Marc et Aurélien ",
"CODE_POSTAL":"12630",
"VILLE":"AGEN D AVEYRON",
"LATITUDE":"44.343518",
"LONGITUDE":"2.716004",
"DESCRIPTIF_FERME":"",  
"DESCRIPTIF_ATELIER":""
"DEMA_CODE":"08-93",
"ANNEE_ADHESION":"2016",
"RACE_MERES":"Limousine",
"DESCRIPTIF_ATELIER":""    
},
{
"CHEPTEL":"12001",
"NOM":"La Ferme ",
"CODE_POSTAL":"12630",
"VILLE":"AGEN D AVEYRON",
"LATITUDE":"44.343518",
"LONGITUDE":"2.716004",
"DESCRIPTIF_FERME":"",
"DEMA_CODE":"08-93",
"ANNEE_ADHESION":"2016",
"RACE_MERES":"Limousine",
"DESCRIPTIF_ATELIER":""
"DEMA_CODE":"08-93",
"ANNEE_ADHESION":"2016",
"RACE_MERES":"Limousine",
"DESCRIPTIF_ATELIER":""
}
]';