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php保存文件的方法：首先创建一个PHP示例文件；然后生成文件；最后用代码“if(isset($_GET["filepath"])) {…}”实现下载保存即可。
本文操作环境：windows7系统、PHP7.1版，DELL G3电脑
php保存文件的方法
PHP 下载保存文件到本地
经常需要点击按钮，然后弹出一个对话框，保存下载文件。
最常见的方式，就用<a>链接实现，例如：
<a href="xxx/youfile.txt"> youfile.txt </a>
本文介绍的下载保存方式，是通过生成文件后，然后用代码实现下载保存。
完整示例（推荐）
<?php /** * 下载文件header函数 * copyright by www.mimvp.com * 2015-05-10 */ $res_filepath = ""; if(isset($_GET["filepath"])) { $res_filepath = $_GET["filepath"]; } // $filepath = "./lib/tmp_txt_result_file_20150508170116.txt"; $file_realpath = realpath($res_filepath); $file_basename = basename($res_filepath); // $file_filesize = filesize($res_filepath); $file_fileinfo = pathinfo($res_filepath); if (!file_exists($res_filepath)){ header("Content-type: text/html; charset=utf-8"); echo "<html> <div style='margin-left: 20px'> <br> <font color='blue'>$file_basename</font> 是临时文件已过期，服务器不保存！ <br><br> 请提取最新代理： <a href='../fetch.php'>http://proxy.mimvp.com/api/fetch.php</a> <!-- <script> alert('" . $file_basename . "\n是临时文件，服务器不保存! \n\n请重新提取最新代理'); </script> --> </div> </html>"; } else { $file_filesize = filesize($res_filepath); $file = fopen($res_filepath, "r"); Header("Content-type: application/octet-stream"); Header("Accept-Ranges: bytes"); Header("Accept-Length: " . $file_filesize); Header("Content-Disposition: attachment; filename=" . $file_basename); echo fread($file, $file_filesize); fclose($file); // echo file_get_contents($filename); // readfile($filename); } // 下载或取消后，删除临时文件 $del_result = @unlink($res_filepath); if ($del_result == true) { @unlink($res_filepath); } ?>
网上其他方式
第一种：
<?php function downfile() { $filename=realpath("resume.html"); //文件名 $date=date("Ymd-H:i:m"); Header( "Content-type: application/octet-stream "); Header( "Accept-Ranges: bytes "); Header( "Accept-Length: " .filesize($filename)); header( "Content-Disposition: attachment; filename= {$date}.doc"); echo file_get_contents($filename); readfile($filename); } downfile(); ?>
或
<?php function downfile($fileurl) { ob_start(); $filename=$fileurl; $date=date("Ymd-H:i:m"); header( "Content-type: application/octet-stream "); header( "Accept-Ranges: bytes "); header( "Content-Disposition: attachment; filename= {$date}.doc"); $size=readfile($filename); header( "Accept-Length: " .$size); } $url="url地址"; downfile($url); ?>
第二种：
<?php function downfile($fileurl) { $filename=$fileurl; $file = fopen($filename, "rb"); Header( "Content-type: application/octet-stream "); Header( "Accept-Ranges: bytes "); Header( "Content-Disposition: attachment; filename= 4.doc"); $contents = ""; while (!feof($file)) { $contents .= fread($file, 8192); } echo $contents; fclose($file); } $url="url地址"; downfile($url); ?>
PHP实现下载文件的两种方法
方法1：
<?php /** * 下载文件, header函数实现 */ header('Content-Description: File Transfer'); header('Content-Type: application/octet-stream'); header('Content-Disposition: attachment; filename='.basename($filepath)); header('Content-Transfer-Encoding: binary'); header('Expires: 0′); header('Cache-Control: must-revalidate, post-check=0, pre-check=0′); header('Pragma: public'); header('Content-Length: ' . filesize($filepath)); readfile($file_path); ?>
了解php中header函数的用法
方法2：
<?php //文件下载, readfile实现 $fileinfo = pathinfo($filename); header('Content-type: application/x-'.$fileinfo['extension']); header('Content-Disposition: attachment; filename='.$fileinfo['basename']); header('Content-Length: '.filesize($filename)); readfile($thefile); exit(); ?>
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