devreply_14_upload.php

<?php

/**
 * Version: 3
 * Reference: https://devreply.com/questions/show/14
 * Date: 2016-08-28
 */

/**
 * @return bool
 */
function isPost()
{
    return $_SERVER['REQUEST_METHOD'] === 'POST';
}

/**
 * @param $file_data
 * @return bool
 */
function isUpload($file_data)
{
    return file_exists($file_data['tmp_name']) and is_uploaded_file($file_data['tmp_name']);
}

/**
 * @param $file_data
 * @return array
 */
function uploadFile($file_data)
{
    $data = [
        'status' => false,
        'message' => '',
        'image' => [],
    ];

    $config = [
        'type_whitelist' => [IMAGETYPE_JPEG],
        'max_size' => 1 * 1000000,
        'ext_list' => [
            2 => 'jpg',
        ],
        'path' => 'images/'
    ];

    if (isset($file_data['error']) and $file_data['error'] === 0) {
        if (isset($file_data['size']) and $file_data['size'] > 0 and $file_data['size'] < $config['max_size']) {
            if (isset($file_data['tmp_name']) and in_array(exif_imagetype($file_data['tmp_name']), $config['type_whitelist'])) {
                $data['image']['mimetype'] = $file_data['type'];
                $data['image']['extension'] = $config['ext_list'][exif_imagetype($file_data['tmp_name'])];
                $data['image']['basename'] = md5(file_get_contents($file_data['tmp_name']));
                $data['image']['filename'] = $data['image']['basename'] . '.' . $data['image']['extension'];
                $data['image']['size'] = $file_data['size'];
                $data['image']['blob'] = file_get_contents($file_data['tmp_name']);
                list($data['image']['width'], $data['image']['height']) = getimagesize($file_data['tmp_name']);

                if (!is_file($config['path'] . $data['image']['filename'])) {
                    if (move_uploaded_file($file_data['tmp_name'], $config['path'] . $data['image']['filename'])) {
                        $data['status'] = true;
                    } else {
                        $data['message'] = 'เกิดปัญหาการย้ายไฟล์';
                    }
                } else {
                    $data['status'] = true;
                }
            } else {
                $data['message'] = 'รูปภาพไม่ใช่ชนิด JPEG';
            }
        } else {
            $data['message'] = 'ขนาดไฟล์ต้องไม่มากกว่า 1MB';
        }
    } else {
        $data['message'] = 'มีปัญหาระหว่างอัพโหลดรูปภาพ';
    }

    return $data;
}

$file_upload = (isset($_FILES['images'])) ? $_FILES['images'] : [];

if (isPost() and isUpload($file_upload)) {
    $result = uploadFile($file_upload);

    if ($result['status']) {
        header('Content-Type: ' . $result['image']['mimetype']);
        echo $result['image']['blob'];
    } else {
        echo $result['message'];
    }
}

?>