How to download txt files in php

php method to implement txt download file: 1. Create a PHP sample file; 2. Add "function downloadtxt($file = "") {...}" code; 3. Pass "downloadtxt(" Just download the file using classmsg");".

The operating environment of this article: Windows 7 system, PHP version 7.1, Dell G3 computer.

How to implement txt file download in php?

PHP implements txt file generation and download

##1.txt Generation

This function is used to output multiple pieces of data. Each field is separated by a space, and the next piece of data will be directly wrapped in a new line.

public function dlfileftxt($data = array(),$filename = "unknown") {
	header("Content-type:application/octet-stream");
	header("Accept-Ranges:bytes"); 
	header("Content-Disposition:attachment;filename=$filename.txt"); 
	header("Expires:0"); 
	header("Cache-Control:must-revalidate,post-check=0,pre-check=0 "); 
	header("Pragma:public");
	if (!empty($data)){
		foreach($data as $key=>$val){
			foreach ($val as $ck => $cv) {
				$data[$key][$ck]=iconv("UTF-8", "GB2312", $cv);				
			}
			$data[$key]=implode(" ", $data[$key]);				
		}
		echo implode("\n",$data);
	}
	exit();
}

dlfileftxt(array(1=>array("student"=>"小红","class"=>"一班"),2=>array("student"=>"老黄","class"=>"二班")),"班级信息");

txtFile name: Class information

txt content:
Xiaohong Class 1
Laohuang Class 2
Code analysis:
"Content-type:application/octet-stream"
//Only binaries can be submitted, and only one binary can be submitted , if you submit a file, you can only submit one file, and there can only be one background receiving parameter, and it can only be a stream (or byte array)
"Accept-Ranges: bytes"
//Indicate whether the server supports it Specify range request and which type of segmented request
"Content-Disposition:attachment;filename=$filename.txt"
//Of course the filename parameter can contain path information, but User-Agnet will ignore this information , only the last part of the path information will be used as the file name. When you use this header information when the response type is application/octet-stream, it means that you do not want to display the content directly, but pop up a "File Download" dialog box, and the next step is up to you." Open "or "Save"
(Note: Some browsers will not be able to recognize Chinese strings and may appear garbled, and you need to force the character encoding of the string to UTF-8)

1.txt download

Since some browsers can interpret txt files, when using the browser to access a certain txt on the server, a new window will be opened to read the txt content instead of downloading the file

function downloadtxt($file = "") {
	if(!$file) 
		return false;
	$filename = '/path/'.$file.'.txt'; //文件路径
	header("Content-Type: application/force-download");
	header("Content-Disposition: attachment; filename=".basename($filename));
	readfile($filename);
}

downloadtxt("classmsg");

Code analysis:

"Content-Type: application/force-download"
//Force download file content
readfile()
//This function reads the file and writes the file content to the standard output device. The return value is the file size read

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