CURL下载文件时如何使用CURLOPT_WRITEFUNCTION [英] How use CURLOPT_WRITEFUNCTION when download a file by CURL

问题描述

我的类直接从链接下载文件：

My Class for download file direct from a link:

MyClass{

          function download($link){
                ......
                $ch = curl_init($link);
                curl_setopt($ch, CURLOPT_FILE, $File->handle);
                curl_setopt($ch,CURLOPT_WRITEFUNCTION , array($this,'__writeFunction'));
                curl_exec($ch);
                curl_close($ch);
                $File->close();
                ......

            }

          function __writeFunction($curl, $data) {
                return strlen($data);            
          } 
}

我想知道如何在下载文件时使用CRULOPT_WRITEFUNCTION。
上面的代码如果我删除行：

I want know how to use CRULOPT_WRITEFUNCTION when download file. Above code if i remove line:

curl_setopt（$ ch，CURLOPT_WRITEFUNCTION，array（$ this，'__ writeFunction'

curl_setopt($ch,CURLOPT_WRITEFUNCTION , array($this,'__writeFunction'));

然后它会运行良好，我可以下载该文件。但如果我使用CURL_WRITEFUNCTION选项，我不能下载文件。

Then it will run good, i can download that file.But if i use CURL_WRITEFUNCTION option i can't download file.

推荐答案

<?php 
$ch = curl_init();
curl_setopt($ch, CURLOPT_BUFFERSIZE, 8096);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt($ch, CURLOPT_URL, 'http://blog.ronnyristau.de/wp-content/uploads/2008/12/php.jpg');

$content = curl_exec($ch);

curl_close($ch);

$out = fopen('/tmp/out.png','w');
if($out){
    fwrite($out, $content);
    fclose($out);
}

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