Function to create thumbnail images with php

upload_helper

function createThumb($rawname, $ext, $path)
    {
        $custom_width = 200;
        $type = str_replace('.', '', $ext);
        $filename = $rawname . $ext;
        $mini_filename = $rawname . '_mini' . $ext;
        $file_path = $path . $filename;
        // Build new image
        if ($type == 'jpeg' || $type == 'jpg') {
            $thumb = imagecreatefromjpeg($file_path);
        } elseif ($type == 'png') {
            $thumb = imagecreatefrompng($file_path);
        } elseif ($type == 'gif') {
            $thumb = imagecreatefromgif($file_path);
        }
        // Original sizes
        $ox = imagesx($thumb);
        $oy = imagesy($thumb);
        // New sizes
        $nx = $custom_width;
        $ny = floor($oy * ($custom_width / $ox));
        $nm = imagecreatetruecolor($nx, $ny);
        // Creating thumbnail
        imagecopyresized($nm, $thumb, 0, 0, 0, 0, $nx, $ny, $ox, $oy);
        imagejpeg($nm, $path . $mini_filename);
    }