CODEWITHSUNDEEP
phpmysqlpdo
driz
driz

Reputation: 463

Using prepared PDO statement with PHP - binary numbers

I'm relatively inexperienced with php, pdo and sql. that being said, I have been working on a small project and while most things are working as intended i'm having some issues. take the following information from the mysql (mariadb) database

| Field  | Type   | Null | Key | Default  | Extra  |
| age    | bit(6) | YES  |     | NULL     |        |

In the PHP I have a simple form where you enter your age, eg. mine is 33.

$age=decbin($_POST['age']);

this correctly shows 100001 when i echo $age. using my (possibly horrible) pdo statements

    $stmt = $DBH->prepare("INSERT INTO Recruit(recruit_id, name, age) VALUES(:recruit_id,:name,:age)");
    $stmt->execute(array(':recruit_id' => $recruit_id, ':name' => $name, ':age' => $age));

recruit_id and name both show up without issue, but age always populates as 111111 regardless of what i enter as the age.

I've tried doing cast(:age as binary(6)) with the same results. I'm simply at a loss of how to accomplish this task.

*****corrected typo in the database paste*****

i have changed age to an integer, however, i still yes a couple on/off options that are stored as binary(1) and the same issue presents. php can show the value as a 1 or 0 correctly, but when sent to the db, it is always a 1. (age presented a good example as all 6 bits were 1)

Upvotes: 1

Views: 939

Answers (1)

kunruh
kunruh

Reputation: 874

UPDATE: After further research, it sounds like my previous answer wont work for the method you are using as parameters passed to the execute function are all treated as PDO::PARAM_STR. You'll want to bind them all separately and use PDO::PARAM_INT for the age variable. Like so:

$stmt = $DBH->prepare("INSERT INTO Recruit(recruit_id, name, age) VALUES(:recruit_id,:name,:age)");
$stmt->bindParam(':recruit_id', $recruit_id, PDO::PARAM_STR);
$stmt->bindParam(':name', $name, PDO::PARAM_STR);
$stmt->bindParam(':age', $age, PDO::PARAM_INT);
$stmt->execute();

(PREVIOUS ANSWER)

From MySQL Reference:

To specify bit values, b'value' notation can be used. value is a binary value written using zeros and ones. For example, b'111' and b'10000000' represent 7 and 128, respectively.

So I'd try this instead: $age = "b'".decbin($_POST['age'])."'";

Upvotes: 1

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