Read the contents of a gzip file from an AWS S3 bucket

laravel_read_gzip_from_s3.php

<?php

$file = Storage::disk('s3')->readStream('bucket/file.csv.gz');

// gzip format ZLIB_ENCODING_GZIP
// ['window' => 15 + 16]
// auto-detect ZLIB_ENCODING_ANY
// ['window' => 15 + 32]
// See https://github.com/php/php-src/blob/master/ext/zlib/tests/zlib_filter_inflate2.phpt
stream_filter_append($file, 'zlib.inflate', STREAM_FILTER_READ, ['window' => 15 + 32]);

while (! feof($file) {
    $record = fgetcsv($file);
    // Do something
}

fclose($file);