PHP 安全上载文件
PHP 安全下载文件
<?phpheader ('Content-Type:text/html;Charset=utf-8');define('ROOT_PATH', dirname(__FILE__));/** * 下载文件 * @param string $file_path 绝对路径 */function downFile($file_path) { //判断文件是否存在 $file_path = iconv('utf-8', 'gb2312', $file_path); //对可能出现的中文名称进行转码 if (!file_exists($file_path)) { exit('文件不存在!'); } $file_name = basename($file_path); //获取文件名称 $file_size = filesize($file_path); //获取文件大小 $fp = fopen($file_path, 'r'); //以只读的方式打开文件 header("Content-type: application/octet-stream"); header("Accept-Ranges: bytes"); header("Accept-Length: {$file_size}"); header("Content-Disposition: attachment;filename={$file_name}"); $buffer = 1024; $file_count = 0; //判断文件是否结束 while (!feof($fp) && ($file_size-$file_count>0)) { $file_data = fread($fp, $buffer); $file_count += $buffer; echo $file_data; } fclose($fp); //关闭文件}downFile(ROOT_PATH . '/down/Sunset.jpg'); ?>

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How to convert php blob to file: 1. Create a php sample file; 2. Through "function blobToFile(blob) {return new File([blob], 'screenshot.png', { type: 'image/jpeg' })} ” method can be used to convert Blob to File.

Use Java's File.length() function to get the size of a file. File size is a very common requirement when dealing with file operations. Java provides a very convenient way to get the size of a file, that is, using the length() method of the File class. . This article will introduce how to use this method to get the size of a file and give corresponding code examples. First, we need to create a File object to represent the file we want to get the size of. Here is how to create a File object: Filef

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The Linux header refers to the beginning of a file or data stream, which is used to contain metadata about the content. By correctly writing and using Header files, developers can better utilize system resources and improve code readability and Maintainability.
