Adding Session / Array to SQL Database

I have the session created and it stores the data, that is working 100%;

I have a foreach loop that converts all the session data into an array of in_fields and in开发者_开发百科_values.

But the form is not submitting to the database, please assist !

    // sql fields and values
$in_fields = array();
$in_values = array();


foreach($_SESSION as $key => $value) {
    if(!empty($value)) {
        $value = sql_escape($value);
        $key = explode("#",$key);

            $in_fields[] = "`{$key[0]}`";
            $in_values[] = "'{$value}'";
    }
}

if(!empty($in_fields)) {

    $sql  = "INSERT INTO wills(";
    $sql .= implode(", ",$in_fields);
    $sql .= ") VALUES (";
    $sql .= implode(", ",$in_values);
    $sql .= ")";

if(executeSql($sql)) {
        $id = mysql_insert_id();
                executeSql($sql);
            }
        }

I have created a print_r of $in_fields and $in_values and it displays as an array.

The error i am receiving now:

Warning: trim() expects parameter 1 to be string, array given in E:\xampp\htdocs\sc\form\inc\functions.php on line 22

Database query error. Unknown column 'step' in 'field list'

LIne 22 from Functions.php

    $value = get_magic_quotes_gpc() ? stripslashes($value) : trim($value);  

Database query error. Unknown column 'step' in 'field list'

do you need any further explanations?