wp-includes/php-ai-client/src/Providers/Http/Collections/HeadersCollection.php:73Gets header values as a comma-separated string.
$namestringstring|null public function getAsString(string $name): ?string { $values = $this->get($name); return $values !== null ? implode(', ', $values) : null; }Introduced in 0.1.0. Unchanged from 7.0.4 through 7.1.0.
Signature, return type and hooks compared across 2 parsed releases.
src/wp-includes/php-ai-client/src/Providers/Http/Collections/HeadersCollection.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.