<?php gmdate(string $format, ?int $timestamp = null): string
<?php $signed_headers_string = "host"; } $date_text = gmdate('Ymd', time()); $time_text = $date_text . 'T000000Z'; $algorithm = 'AWS4-HMAC-SHA256'; $scope = $date_text . "/" . $AWSRegion . "/s3/aws4_request";