mysqli - mysqli_stmt_bind_param returns no feedback -

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i trying catch error unsuccessful bind statement result in, why deliberately not passing in types mysqli_stmt_bind_param() function. please see code snippet below

$email = 'test@test.com'; $password = 'password'; if (!(mysqli_stmt_bind_param($stmt , '' , $email, $password))) {     echo "binding parameters failed: (" . mysqli_stmt_errno($stmt) . ") " . mysqli_stmt_error($stmt) . "<br>"; }

however, mysqli_stmt_errno returns 0 , mysqli_stmt_error() returns empty string.

php gives warning saying warning: mysqli_stmt_bind_param(): invalid type or no types specified in c:\wamp\www\test\database1.php on line 28 why not feedback database?

because binding has nothing database.


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