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How to save files in php

藏色散人

Release： 2023-03-11 08:10:02

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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。

How to save files in php

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，就用链接实现，例如：

<a href="xxx/youfile.txt"> youfile.txt </a>

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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($res_filepath)){
        header("Content-type: text/html; charset=utf-8");
        echo "<html>
                <div style=&#39;margin-left: 20px&#39;>
                    <br>
                    <font color=&#39;blue&#39;>$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=&#39;../fetch.php&#39;>http://proxy.mimvp.com/api/fetch.php</a>
                     
                    <!--
                    <script>
                    alert(&#39;" . $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&#39;);
                    </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);
    }
?>

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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();
?>

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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);
?>

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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);
?>

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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(&#39;Content-Description: File Transfer&#39;);
    header(&#39;Content-Type: application/octet-stream&#39;);
    header(&#39;Content-Disposition: attachment; filename=&#39;.basename($filepath));
    header(&#39;Content-Transfer-Encoding: binary&#39;);
    header(&#39;Expires: 0′);
    header(&#39;Cache-Control: must-revalidate, post-check=0, pre-check=0′);
    header(&#39;Pragma: public&#39;);
    header(&#39;Content-Length: &#39; . filesize($filepath));
    readfile($file_path);
?>

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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(&#39;Content-type: application/x-&#39;.$fileinfo[&#39;extension&#39;]);
    header(&#39;Content-Disposition: attachment; filename=&#39;.$fileinfo[&#39;basename&#39;]);
    header(&#39;Content-Length: &#39;.filesize($filename));
    readfile($thefile);
    exit();
?>

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