PHP Dynamic Query Creation from form - php

Question

I am trying to be clever, possibly too clever in creating a set of forms that will dynamically insert their data into the database based on their input names.
I have it so it builds the query correctly, however when I attempt to insert it fails as to say it is a malformed query, is there a better way of doing what I am trying to achieve, but similarly?
<form method="post">
<input type="text" name="form_array['text']" />
<button name="insert">Go</button>
</form>
Here is my query generation, on submit of the form:
$setup['table'] = "table1";
if(isset($_POST['insert'])){
$inserts = "";
$values = "";
foreach($_POST['form_array'] as $form_id => $form_data){
if(!empty($form_data)){
if(!isset($first_run)){
$first_run = 1;
$inserts .= $form_id;
$values .= "'".$form_data."'";
} else {
$inserts .= ", ".$form_id;
$values .= ", '".$form_data."'";
}
} else {
die('error');
}
}
die("INSERT INTO '".$setup['table']."' ($inserts) VALUES ($values)");
}
Thanks.

Answer 1

Aside from all the fixes that was commented to you; this can be simplified, try it;
<form method="post">
<input type="text" name="form_array[column1]" />
<input type="text" name="form_array[column2]" />
<button name="insert">Go</button>
</form>
<?php
if(isset($_POST['insert'])){
$table = 'table';
$handler = 'form_array';
$keys = array_keys($_POST[$handler]);
$sql = "INSERT INTO `{$table}` (`".implode('`, `', $keys)."`) VALUES ('".implode("', '", $_POST[$handler])."')";
echo $sql;
}
Output:
INSERT INTO `table` (`column1`, `column2`) VALUES ('value1', 'value2')