<?php
$arr = [
0 => "Column 1, Column 2 ,Column 3,Column 4,Column 5,Column 6",
1 => "19506,7254,321878,8,1,60",
2 => "187486,685,377,3,0,0",
3 => "187498,682285,3354,45,1,400",
4 => "18498,681285,38959,2,0,0",
];
$keys = explode(",", str_replace(" ","",$arr[0]));
array_shift($arr);
$arr = array_map(function($a) use($keys){
return array_combine($keys, explode(",",$a));
}, $arr);
print_r($arr);
preferences:
23.3 ms | 409 KiB | 5 Q