PHP, MySql, mysqli insert_id Returns 0 Always
System / development characteristics;
- Windows 7 Ultimate x64 SP1 + all updates
- PHP Version 5.5.15 Non-Thread Safe (x64 Experimental)
- MySQL Server 5.6 (x64)
- Php mysqli
I am executing a stored procedure that inserts username and password into a table with an AUTO_INCREMENT id field INT (11) PK.
PROCEDURE `user_account_create`(IN userName VARCHAR(32), IN userPasskey VARCHAR(254))
BEGIN
START TRANSACTION;
INSERT INTO user_account (`name`, passkey) VALUES (userName, userPasskey);
IF (ROW_COUNT() = 1) THEN COMMIT; ELSE ROLLBACK; END IF;
SELECT ROW_COUNT() AS affected_rows; -- Used for PHP mysqli Connection and Statement affected_rows, and num_rows (Statement) fields.
END
I've wrapped mysqli in my class, in short:
namespace DataAccess\Broker {
final class MySqliDb {
private $conn;
public function __construct($dbHost, $dbUser, $dbPass, $dataBase) {
$this->conn = new \mysqli($dbHost, $dbUser, $dbPass, $dataBase);}
public function ExecuteStatement($cmdText, array $paramValue = null) {
$affected = -1;
$stmt = $this->CreateStatement($cmdText, paramValue);
$stmt->execute();
// echo 'insert_id' . $this->conn->insert_id;
$stmt->store_result();
$affected = $stmt->affected_rows;
stmt->close();
return $affected;
}
// ... other functions that utilse CreateStatement below
private function CreateStatement($cmdText, array $paramValue = null) {
$stmt = $this->conn->prepare($cmdText);
if ($paramValue !== null) {
$params = [];
foreach ($paramValue as $p => &$v) {$params[$p] = &$v;}
call_user_func_array([$stmt, 'bind_param'], $params);
}
return $stmt;
}
} // class
} // namespace
Testing this in the index.php page;
use \DataAccess\Broker\MySqliDb as mysqldb;
$db = new mysqldb('127.0.0.1', 'root', '', 'thedb');
$types = 'ss'; $user_name = 'its_me'; $pass_key = 'a-hashed-password';
echo 'Affected Rows: ' . $db->ExecuteStatement('CALL user_account_create(?,?)', [$types, $user_name, $pass_key]);
Give way, Affected Lines: 1 .
The insert was successful. I also need the insert id from this command, but the insert_id for the mysqli connection and the statement is 0. From var_dump;
var_dump to connect:
object(mysqli)#2 (19) {
["affected_rows"] => int(1)
["client_info"] => string(79) "mysqlnd 5.0.11-dev - 20120503 - $Id: xxx$" ["client_version"] => int(50011)
["connect_errno"] => int(0) ["connect_error"] => NULL
["errno"] => int(0) ["error"] => string(0) "" ["error_list"] => array(0) { }
["field_count"] => int(1)
["host_info"] => string(20) "127.0.0.1 via TCP/IP" ["info"] => NULL
["insert_id"] => int(0)
["server_info"] => string(6) "5.6.20" ["server_version"] => int(50620)
["stat"] => NULL
["sqlstate"] => string(5) "HY000"
["protocol_version"] => int(10)
["thread_id"] => int(6)
["warning_count"] => int(0)}
var_dump for operator:
object(mysqli_stmt)#3 (10) {
["affected_rows"] => int(1)
["insert_id"] => int(0)
["num_rows"] => int(1)
["param_count"] => int(6)
["field_count"] => int(1)
["errno"] => int(0) ["error"] => string(0) "" ["error_list"] => array(0) { }
["sqlstate"] => string(5) "00000"
["id"] => int(1)}
Interestingly, there is an "id" field that returns the required id from a field id
in my table. Can anyone understand why insert_id is returning 0.
Thank you and welcome, NSKK
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Try writing a stored procedure with a variable instead of calling row_count()
twice:
PROCEDURE `user_account_create`(IN userName VARCHAR(32), IN userPasskey VARCHAR(254))
BEGIN
START TRANSACTION;
INSERT INTO user_account (`name`, passkey) VALUES (userName, userPasskey);
IF ((@rc := ROW_COUNT) = 1) THEN COMMIT; ELSE ROLLBACK; END IF;
SELECT @rc AS affected_rows; -- Used for PHP mysqli Connection and Statement affected_rows, and num_rows (Statement) fields.
END;
I think the second call is for the operator if
.
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