php图片管理后台

// 检查文件大小
if ($_FILES['file']['size'] > 500000) {
    echo "文件太大";
    exit;
}

// 检查文件类型
$allowed_types = array('jpg', 'jpeg', 'png', 'gif');
$file_type = strtolower(pathinfo($_FILES['file']['name'], PATHINFO_EXTENSION));
if (!in_array($file_type, $allowed_types)) {
    echo "不支持的文件类型";
    exit;
}

// 检查磁盘空间
if (disk_free_space('.') < $_FILES['file']['size']) {
    echo "磁盘空间不足";
    exit;
}

// 移动上传的文件到指定目录
$upload_dir = 'uploads/';
if (!file_exists($upload_dir)) {
    mkdir($upload_dir, 0777, true);
}
$target_file = $upload_dir . basename($_FILES['file']['name']);
if (move_uploaded_file($_FILES['file']['tmp_name'], $target_file)) {
    echo "文件上传成功";
} else {
    echo "文件上传失败";
}

// 确保图片路径正确
$image_path = 'uploads/' . basename($_FILES['file']['name']);
if (file_exists($image_path)) {
    header('Content-Type: image/jpeg');
    readfile($image_path);
} else {
    echo "图片不存在";
}