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php保存文件的方法：首先創(chuàng)建一個(gè)PHP示例文件；然后生成文件；最后用代碼“if(isset($_GET["filepath"])) {…}”實(shí)現(xiàn)下載保存即可。
本文操作環(huán)境：windows7系統(tǒng)、PHP7.1版，DELL G3電腦
php保存文件的方法
PHP 下載保存文件到本地
經(jīng)常需要點(diǎn)擊按鈕，然后彈出一個(gè)對(duì)話框，保存下載文件。
最常見(jiàn)的方式，就用<a>鏈接實(shí)現(xiàn)，例如：
<a href="xxx/youfile.txt"> youfile.txt </a>
本文介紹的下載保存方式，是通過(guò)生成文件后，然后用代碼實(shí)現(xiàn)下載保存。
完整示例（推薦）
<?php /** * 下載文件header函數(shù) * 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> 是臨時(shí)文件已過(guò)期，服務(wù)器不保存！ <br><br> 請(qǐng)?zhí)崛∽钚麓恚?<a href='../fetch.php'>http://proxy.mimvp.com/api/fetch.php</a> <!-- <script> alert('" . $file_basename . "\n是臨時(shí)文件，服務(wù)器不保存! \n\n請(qǐng)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); } // 下載或取消后，刪除臨時(shí)文件 $del_result = @unlink($res_filepath); if ($del_result == true) { @unlink($res_filepath); } ?>
網(wǎng)上其他方式
第一種：
<?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); ?>
第二種：
<?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實(shí)現(xiàn)下載文件的兩種方法
方法1：
<?php /** * 下載文件, header函數(shù)實(shí)現(xiàn) */ 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函數(shù)的用法
方法2：
<?php //文件下載, readfile實(shí)現(xiàn) $fileinfo = pathinfo($filename); header('Content-type: application/x-'.$fileinfo['extension']); header('Content-Disposition: attachment; filename='.$fileinfo['basename']); header('Content-Length: '.filesize($filename)); readfile($thefile); exit(); ?>
推薦學(xué)習(xí)：《PHP視頻教程》
