PDO insert a simple array into MySQL database

Question

I have a form which allows multiple text boxes for users to add different question names, these are then passed to an array:

name="question_name[]

How do i go about inserting this array into my questions table using PDO and MySQL? I have tried:

$sql = "INSERT INTO questions (`question_name`) VALUES (:question_name)";
$stmt = $db->prepare($sql);
$stmt->bindValue(':question_name', $question_name);
$stmt->execute();

This gives me

Array to string conversion" error.

I have tested the print_r statement and the results are as expected:

Array ( [0] => [Answer1] => [2] => [Answer2])

etc... depending on the amount of text boxes used.

I understand that it is to do with BindValues / BindParam / execute() statement I would just like a correct method that works and reasoning to help me learn. Thanks.

@JayBlanchard thanks for the spot, I have changed that, the same error persists — StackMeUp123
– StackMeUp123, Commented Feb 16, 2016 at 18:38

u_mulder · Accepted Answer · 2016-02-16 19:03:32Z

2

Simple solution:

$sql = "INSERT INTO questions (`question_name`) VALUES (:question_name)";
// prepare a stamemnt only once
$stmt = $db->prepare($sql);
$stmt->bindParam(':question_name', $question_name);
// iterate over your POST[question_name] array
foreach ($_POST['question_name'] as $question_name) {
    $stmt->execute();
}

edited Feb 16, 2016 at 19:03

answered Feb 16, 2016 at 18:37

u_mulder

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3 Comments

StackMeUp123 Over a year ago

Such a simple solution. No explanation needed really. Thank you!

u_mulder Over a year ago

@YourCommonSense That's bindValue bro. Do the second change and set bindParam.

Your Common Sense Over a year ago

Just realized that it was foolish edit that I made. Dunno what I were thinking of but it seems I was totally absent-minded. My apologies.

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