根据数组键名删除post值中的引号

Question

I want to be able to remove quotations from a field on or abouts the name of 'quote'. On post, all my field names and values get matched up and put into an array then enter to the database. Before the SQL is built and after I build the value-key array, how can I single out the field quote, remove the quotation marks that the user inputted, and then add/keep the content in the $values array for my SQL? The questionable area starts with the comment "remove quotes"

public function insertIntoDb($table, $carryUrl = NULL, $ext = '')
{
    if (in_array($table, $this->disallow_insert)) {
        self::show_error("Inserting into the table '{$table}' is not possible, check the configuration file if this is an error.");
    } elseif (!isset($table)) {
        self::show_error('Missing `table` parameter in ' . __FUNCTION__);
    }
    $resultInsert = Nemesis::query("SHOW COLUMNS FROM {$table}");
    if (!$resultInsert) {
        self::show_error(QUERY_ERROR);
    }
    $fieldnames = array();
    if ($resultInsert->num_rows > 0) {
        while ($row = $resultInsert->fetch_array()) {
            $fieldnames[] = $row['Field'];
            $values = array_intersect_key($_POST, array_flip($fieldnames));
            // $values = array_filter($values, function($x) { return $x !== ''; });
            // <5.3 $values = array_filter($values, create_function('$x', 'return $x !== "";'));
        }
    }
    // remove quotes for testimonials
    if (array_key_exists('quote', array_change_key_case($values, CASE_LOWER))) {

        $values['quote'] = preg_replace("/<!--.*?-->/", "", $values); // remove quotes

    }
    // filter the array
    $values = self::filter($values);
    $sql = sprintf("INSERT INTO %s (created, created_by, %s) VALUES (NOW(), '$_SESSION[user_id]', '%s')", $table, implode(', ', array_keys($values)), implode("', '", $values));
    if ($this->debug) {
        echo '<p>' . $sql . '</p>';
    } elseif (Nemesis::query($sql)) {
        $msg = new Messages();
        $msg->add('s', QUERY_INSERT_SUCCESS);
        if ($table == 'projects') {
            $msg = new Messages();
            $msg->add('s', "Information was added to the database. Time to add images!");
        }
        if (!is_null($carryUrl) && isset($carryUrl)) {
            redirect($carryUrl . '?id=' . $_POST['id'] . '&table=' . $table . $ext);
        }
    } else {
        self::show_error(QUERY_ERROR);
    }
}

Answer 1

preg_replace is a function that returns a value, not a void. You'll need to assign the returned value back to $values['quote']:

// remove quotes for testimonials
if (array_key_exists('quote', array_change_key_case($values, CASE_LOWER))) {

    $values['quote'] = preg_replace("/(\"|')/", "", $values['quote']); // remove quotes

}