获取上传错误 codeigniter - PHP

在CodeIgniter中，上传文件时会产生不同类型的错误，例如文件大小超过限制、文件类型不正确等。在处理上传过程中，必须捕获并正确处理这些错误，以确保上传过程的正常进行以及数据的完整性。

下面是在CodeIgniter中获取文件上传错误的示例代码：

if ($_FILES['userfile']['error'] > 0) {
    switch($_FILES['userfile']['error']) {
        case UPLOAD_ERR_INI_SIZE:
            $error = 'The uploaded file exceeds the upload_max_filesize directive in php.ini.';
            break;
        case UPLOAD_ERR_FORM_SIZE:
            $error = 'The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form.';
            break;
        case UPLOAD_ERR_PARTIAL:
            $error = 'The uploaded file was only partially uploaded.';
            break;
        case UPLOAD_ERR_NO_FILE:
            $error = 'No file was uploaded.';
            break;
        case UPLOAD_ERR_NO_TMP_DIR:
            $error = 'Missing a temporary folder.';
            break;
        case UPLOAD_ERR_CANT_WRITE:
            $error = 'Failed to write file to disk.';
            break;
        case UPLOAD_ERR_EXTENSION:
            $error = 'File upload stopped by extension.';
            break;
        default:
            $error = 'Unknown upload error';
            break;
    }
}

在上述代码中，我们首先检查 $_FILES['userfile']['error'] 是否大于零，如果大于零，则表示存在上传错误。 然后，我们使用PHP的 switch 语句和不同的 UPLOAD_ERR_* 常量来判断所发生的具体错误类型。最后，我们可以将错误消息存储在 $error 变量中。

完成上述操作后，我们可以根据需要使用 $error 变量来输出错误消息或执行其他处理操作。

以上就是在CodeIgniter中获取文件上传错误的示例代码，希望能够帮助到大家。