wp-includes/SimplePie/src/XML/Declaration/Parser.php:196Read value
public function get_value() { $quote = substr($this->data, $this->position, 1); if ($quote === '"' || $quote === "'") { $this->position++; $len = strcspn($this->data, $quote, $this->position); if ($this->has_data()) { $value = substr($this->data, $this->position, $len); $this->position += $len + 1; return $value; } } return false; }One change between 6.7.7 and 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
none to string|false.verified against sourcesrc/wp-includes/SimplePie/src/XML/Declaration/Parser.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.