PHP convert CSV to specific JSON format

Question

I have a CSV file that looks like:

Name, Id, Address, Place,
John, 12, "12 mark street", "New York",
Jane, 11, "11 bark street", "New York"...

I have about 500 coloumns. I would like to convert this to JSON, but I want the output to look like:

{
    "name": [
        "John",
        "Jane"
    ],
    "Id": [
        12,
        11
    ],
    "Address": [
        "12 mark street",
        "12 bark street"
    ],
    "Place": [
        "New York",
        "New York"
    ]
}

Using PHP, how can I iterate through the CSV file so that I can make each column in the first row an array that holds the values in the same column on all the other rows?

Answer 1

this would be a generic method which is valid for any amoutn of named colums. if they are static, it will be shorter to address them directly

<?
$result = array();
if (($handle = fopen("file.csv", "r")) !== FALSE) {
    $column_headers = fgetcsv($handle); // read the row.
    foreach($column_headers as $header) {
            $result[$header] = array();
    }

    while (($data = fgetcsv($handle)) !== FALSE) {
        $i = 0;
        foreach($result as &$column) {

                $column[] = $data[$i++];
        }

    }
    fclose($handle);
}
$json = json_encode($result);
echo $json;