Grouping a collection IN LARAVEL - arrays

Question

I have an array called $customerRecords. I want to group the data in this array by the customer's email.
This is the array below
$customerRecords = [
{
"id": 1,
"note": "This is note 1",
"customer": [
{
"id": 1,
"user_id": 34,
"email": "doe#mailnator.com",
"phone": "9829484857"
}
]
},
{
"id": 2,
"note": "This is note 2",
"customer": [
{
"id": 2,
"user_id": 34,
"email": "john#mailnator.com",
"phone": "9829484857"
}
]
},
{
"id": 3,
"note": "This is a note 3",
"customer": [
{
"id": 2,
"user_id": 34,
"email": "john#mailnator.com",
"phone": "9829484857"
}
]
},
]
This is the expected result I want to achieve so that I can know the group of data that belongs to an email .
{
"doe#mailnator.com": [
{
"id": 1,
"note": "This is note 1",
"customer": [
{
"id": 1,
"user_id": 34,
"email": "doe#mailnator.com",
"phone": "9829484857"
}
]
}
],
"john#mailnator.com": [
{
"id": 2,
"note": "This is note 2",
"customer": [
{
"id": 2,
"user_id": 34,
"email": "john#mailnator.com",
"phone": "9829484857"
}
]
},
{
"id": 3,
"note": "This is a note 3",
"customer": [
{
"id": 2,
"user_id": 34,
"email": "john#mailnator.com",
"phone": "9829484857"
}
]
}
]
}
So this is what I have tried but it's not working:
return collect($customerRecords)->groupBy('customer.email')

Answer 1

you are almost done just define customer 0 item then email
return collect($customerRecords)->groupBy('customer.0.email');

Answer 2

This is how I was able to solve it.
$grouped = [];
foreach($customerRecords as $value) {
foreach($value['customer'] as $cust) {
$grouped[$cust['email']][] = $value;
}
}