gistfile1.php

<?php 

public function addhw() {
		
    $array=array(
        'hw_name' => $_POST['hw_name'],
        'hw_description' =>$_POST['hw_description'], 
        'hw_model' => $_POST['hw_model'],
        'hw_serialno' => $_POST['hw_serialno'],
        'hw_manufacturer_id' => $_POST['manufacturer_id'],
        'hw_picture' => 'includes/images/hardware_logo.png'
    );

    $query = $this->db->insert('hardware', $array);
    $last_id = $this->db->insert_id();
    
    if($_POST['hw_type'] == 'RAM' || $_POST['hw_type'] == 'Graphics Card') {
        $array1=array(
            'hardware_id'=>$last_id,
            'memory_type'=>$_POST['memory_type'],
            'memory_size'=>$_POST['memory_size']
        );
        
        $query1=$this->db->insert('hardware_memory',$array1);

        if (!$query1) {
            echo mysqli_error($query1);
        }else{
            return $query;
        }
    }
    
    return $query;
}