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Something handy when importing CSV files:
<?php
$csv = array_map('str_getcsv', file($file));
array_walk($csv, function(&$a) use ($csv) {
$a = array_combine($csv[0], $a);
});
array_shift($csv); # remove column header
?>
This will yield something like this – keys are the fields/ table header of the CSV file.
[2] => Array ( [Campaign ID] => 295095038 [Ad group ID] => 22460178158 [Keyword ID] => 3993587178 )