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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