Pdo V20 Extended Features -

$stmt->execute([$accId, $start, $end]); // Runtime warning: implicit cast

Are you running on a or a monolithic server ? pdo v20 extended features

PDO v20 focuses on modern application needs: scalable connection management, async/batch primitives, improved type fidelity, secure credential handling, and richer observability — all while preserving backward compatibility. Implementation across drivers will vary; applications should query capabilities and adopt incrementally. class PDOPool private $cfg

class PDOPool private $cfg; private $idle=[]; private $active=[]; public function __construct($cfg) $this->cfg=$cfg; public function acquire() if($h = array_pop($this->idle)) $this->active[spl_object_id($h)]=1; return $h; $pdo = new PDO($this->cfg['dsn'],$this->cfg['username'],$this->cfg['password']); $h = new PDOConnectionHandle($pdo,$this); $this->active[spl_object_id($h)]=1; return $h; public function __construct($cfg) $this-&gt

In standard PDO, every query blocks script execution until the database returns a result. PDO v20 introduces asynchronous execution, allowing developers to initiate multiple queries and retrieve results later without stalling the PHP process.

This is enabled via a new attribute: PDO::ATTR_DEFAULT_FETCH_MODE = PDO::FETCH_TYPED .