使CSV文件可下载

Question

I use the below code. But the file created in tmp is not downloading .

 $error = fopen(/tmp/error.csv);
     $write[] = "hello";
     $dest_file_path="/tmp/error.csv";
        $dest_file_name="error.csv";
        if(!empty($write))
        {
            $flag = FALSE;
            fputcsv($error,$write,";");
            fclose($error);
            header("Content-Transfer-Encoding: Binary");
            header("Content-length: ".filesize($dest_file_path));
            header('Content-Type: text/csv');
            header('Content-Disposition: attachment; filename="'.$dest_file_name.'"');
            readfile($dest_file_path);
        }

Answer 1

This answer is as per your original post without marking your edited post as an " edit ".

---

The problem is that fopen() requires 2 parameters.

As per the manual:

<?php
$handle = fopen("c:\\folder\\resource.txt", "r");
?>

So this line:

$error = fopen(/tmp/error.csv);

should read as (which is missing quotes and since you want to write to the file, w )

$error = fopen('/tmp/error.csv', 'w');

You may need to adjust your path, something to the effect of:

$error = fopen('/var/user/you/tmp/error.csv', 'w');

or

$error = fopen('/var/user/you/public_html/tmp/error.csv', 'w');

If you had error reporting on, it would have signaled something similar to this:

Warning: fopen() expects at least 2 parameters, 1 given in /path/to/file.php on line x

Add error reporting to the top of your file(s) which will help find errors.

<?php 
error_reporting(E_ALL);
ini_set('display_errors', 1);

Sidenote: Error reporting should only be done in staging, and never production.

---

More examples from the manual:

<?php
$handle = fopen("/home/rasmus/file.txt", "r");
$handle = fopen("/home/rasmus/file.gif", "wb");
$handle = fopen("http://www.example.com/", "r");
$handle = fopen("ftp://user:password@example.com/somefile.txt", "w");
?>

Answer 2

try this code

// output headers so that the file is downloaded rather than displayed
header('Content-Type: text/csv; charset=utf-8');
header('Content-Disposition: attachment; filename=data.csv');

// create a file pointer connected to the output stream
$output = fopen('php://output', 'w');

// output the column headings
fputcsv($output, array('Column 1', 'Column 2', 'Column 3'));

// fetch the data
mysql_connect('localhost', 'username', 'password');
mysql_select_db('database');
$rows = mysql_query('SELECT field1,field2,field3 FROM table');

// loop over the rows, outputting them
while ($row = mysql_fetch_assoc($rows)) fputcsv($output, $row);

taken from this link http://code.stephenmorley.org/php/creating-downloadable-csv-files/