Viewing file:  marshal_headers_from_sapi.php (2.18 KB) -rw-r--r--
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<?php
declare(strict_types=1);
namespace Laminas\Diactoros;
use function array_filter;
use function array_key_exists;
use function is_string;
use function str_starts_with;
use function strtolower;
use function strtr;
use function substr;
use const ARRAY_FILTER_USE_KEY;
/**
* @param array $server Values obtained from the SAPI (generally `$_SERVER`).
* @return array<non-empty-string, mixed> Header/value pairs
*/
function marshalHeadersFromSapi(array $server): array
{
$contentHeaderLookup = isset($server['LAMINAS_DIACTOROS_STRICT_CONTENT_HEADER_LOOKUP'])
? static function (string $key): bool {
static $contentHeaders = [
'CONTENT_TYPE' => true,
'CONTENT_LENGTH' => true,
'CONTENT_MD5' => true,
];
return isset($contentHeaders[$key]);
}
: static fn(string $key): bool => str_starts_with($key, 'CONTENT_');
$headers = [];
foreach ($server as $key => $value) {
if (! is_string($key) || $key === '') {
continue;
}
if ($value === '') {
continue;
}
// Apache prefixes environment variables with REDIRECT_
// if they are added by rewrite rules
if (str_starts_with($key, 'REDIRECT_')) {
$key = substr($key, 9);
// We will not overwrite existing variables with the
// prefixed versions, though
if (array_key_exists($key, $server)) {
continue;
}
}
if (str_starts_with($key, 'HTTP_')) {
$name = strtr(strtolower(substr($key, 5)), '_', '-');
$headers[$name] = $value;
continue;
}
if ($contentHeaderLookup($key)) {
$name = strtr(strtolower($key), '_', '-');
$headers[$name] = $value;
continue;
}
}
// Filter out integer keys.
// These can occur if the translated header name is a string integer.
// PHP will cast those to integers when assigned to an array.
// This filters them out.
return array_filter($headers, fn(string|int $key): bool => is_string($key), ARRAY_FILTER_USE_KEY);
}
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