PHP - Create an associative array from the .txt file

This question already has an answer here:

• CSV to Associative Array 5 answers

I have .txt file formatted as such:

    "id","dealer_id","vin","stockno",
    "1","2","3","4",
    "5","6","7","8",
    "9","10","11",12"

My goal is push this into an associative array like such:

    "id"=>"1", "dealer_id"=>"2", "vin"=>"3", "stockno"=>"4"

My question is, the data loops through for every 4 entries. In the example above, I should have 3 arrays created like such:

    "id"=>"1", "dealer_id"=>"2", "vin"=>"3", "stockno"=>"4"
    "id"=>"5", "dealer_id"=>"6", "vin"=>"7", "stockno"=>"8"
    "id"=>"9", "dealer_id"=>"10", "vin"=>"11", "stockno"=>"12"

How can I make this happen within PHP -- if possible at all?

---

Here's one approach:

<?php
$file = fopen('data.txt', 'r');
$headers = fgetcsv($file);
$result = array();
while ($row = fgetcsv($file)) {
        if (!$row[0]) continue;
        $nextItem = array();
        for ($i = 0; $i < 4; ++$i) {
                $nextItem[$headers[$i]] = $row[$i];
        }
        $result[] = $nextItem;
}
fclose($file);
var_dump($result);

This uses fgetcsv to read each delimited row of the file. The first row is used as the header names. Then, for each other row, we create a new entry and match the indexes to the header names. I set it to 4 because you have a trailing delimiter that creates an empty entry at the end, if you removed those from the input you could use the length of $headers for the inner loop.

Here is the result of the var_dump for your data:

array(3) {
  [0]=>
  array(4) {
    ["id"]=>
    string(1) "1"
    ["dealer_id"]=>
    string(1) "2"
    ["vin"]=>
    string(1) "3"
    ["stockno"]=>
    string(1) "4"
  }
  [1]=>
  array(4) {
    ["id"]=>
    string(1) "5"
    ["dealer_id"]=>
    string(1) "6"
    ["vin"]=>
    string(1) "7"
    ["stockno"]=>
    string(1) "8"
  }
  [2]=>
  array(4) {
    ["id"]=>
    string(1) "9"
    ["dealer_id"]=>
    string(2) "10"
    ["vin"]=>
    string(2) "11"
    ["stockno"]=>
    string(3) "12""
  }
}