Can't save $_POST array to database with function - php

Question

I have a form that has multiple inputs of the same name, resulting in an array. I want to pass this $_POST array to a function which will process and save the array into a database.
I've done this before with no problems without using a function, but now that I want to contain it all in a nice neat function call it won't do it and I'm not sure why?
The input/post variable in question is named option[] and is passed to the function as $_POST['option']. Here is the function:
function newVariant($name, $option) {
global $db;
global $table_prefix;
$table = $table_prefix . "variants";
$query = $db->prepare("INSERT INTO $table(name) VALUES(:name)");
$query->bindParam(":name", $name);
if (!$query->execute()) {
die(showMessage("Error!","There has been a problem saving your variant. Please try again or contact technical support if the problem persists.",""));
}
$variant_id = $db->lastInsertId('id');
for($i = 0; $i < count($option); $i++) {
if($option[$i] != "") {
$table2 = $table_prefix . "variant_items";
$query2 = $db->prepare("INSERT INTO $table2(variant, option) VALUES(:variant, :option)");
$query2->bindParam(":variant", $variant_id);
$query2->bindParam(":option", $option[$i]);
if (!$query2->execute()) {
die(showMessage("Error!","There has been a problem saving your variant. Please try again or contact technical support if the problem persists.",""));
}
}
}
$redirect = renderLink("/beyond/?act=admin&sub=variants", "true");
showMessage("Saving variant...<META HTTP-EQUIV=\"Refresh\" Content=\"1; URL=$redirect\">","","");
}
This is the error I'm getting in my log:
PHP Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'option) VALUES(?, ?)' at line 1' in /Users/adampcollings/Sites/Hot Mint Development/beyond/php/functions/product.php:131
Stack trace:
#0 /Users/adampcollings/Sites/Hot Mint Development/beyond/php/functions/product.php(131): PDO->prepare('INSERT INTO bb_...')
#1 /Users/adampcollings/Sites/Hot Mint Development/beyond/html/admin/new-variant.php(5): newVariant('Test', Array)
#2 /Users/adampcollings/Sites/Hot Mint Development/beyond/php/html.php(19): include('/Users/adampcol...')
#3 /Users/adampcollings/Sites/Hot Mint Development/beyond/html/admin.php(10): subElement('admin', 'new-variant')
#4 /Users/adampcollings/Sites/Hot Mint Development/beyond/php/html.php(8): include('/Users/adampcol...')
#5 /Users/adampcollings/Sites/Hot Mint Development/beyond/index.php(14): siteElement('a in /Users/adampcollings/Sites/Hot Mint Development/beyond/php/functions/product.php on line 131

Answer 1

Based on the comment thread above, there are several things you should try.
First, always enable error reporting when debugging an application. To do this in your script, add:
error_reporting(E_ALL);
to the top of your script.
Second, ensure that $options contains the data you expect. Somewhere in your code, add the following line:
var_dump($options);
This will show you the contents of $options. If it does not contain the values you expect, check your submission process.
Finally, if $options contains the expected data, check your table structure to ensure that your query matches and inserts the correct values.
EDIT: After you posted the MySQL error, I cross-checked the MySQL Reserved Words list. The word 'option' is on the list. As such, the query is failing because the word is not recognized as a column name. Try surrounding the column name with backticks:
$query2 = $db->prepare("INSERT INTO $table2(`variant`, `option`)...