wp-includes/php-ai-client/src/Providers/Http/DTO/Request.php:229Gets the Content-Type header value.
string|null private function getContentType(): ?string { $values = $this->getHeader('Content-Type'); return $values !== null ? $values[0] : 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/DTO/Request.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.