CURLFile 类

i've seen some downvotes , here is a small example of using curl to upload image .<?php$target="http://youraddress.tld/example/upload.php";# http://php.net/manual/en/curlfile.construct.php// Create a CURLFile object / procedural method $cfile = curl_file_create('resource/test.png','image/png','testpic'); // try adding // Create a CURLFile object / oop method #$cfile = new CURLFile('resource/test.png','image/png','testpic'); // uncomment and use if the upper procedural method is not working.// Assign POST data$imgdata = array('myimage' => $cfile);$curl = curl_init();curl_setopt($curl, CURLOPT_URL, $target);curl_setopt($curl, CURLOPT_USERAGENT,'Opera/9.80 (Windows NT 6.2; Win64; x64) Presto/2.12.388 Version/12.15');curl_setopt($curl, CURLOPT_HTTPHEADER,array('User-Agent: Opera/9.80 (Windows NT 6.2; Win64; x64) Presto/2.12.388 Version/12.15','Referer: http://someaddress.tld','Content-Type: multipart/form-data'));curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); // stop verifying certificatecurl_setopt($curl, CURLOPT_RETURNTRANSFER, true); curl_setopt($curl, CURLOPT_POST, true); // enable postingcurl_setopt($curl, CURLOPT_POSTFIELDS, $imgdata); // post images curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true); // if any redirection after upload$r = curl_exec($curl); curl_close($curl);?>

There are "@" issue on multipart POST requests.Solution for PHP 5.5 or later:- Enable CURLOPT_SAFE_UPLOAD.- Use CURLFile instead of "@".Solution for PHP 5.4 or earlier:- Build up multipart content body by youself.- Change "Content-Type" header by yourself.The following snippet will help you :D<?php/** * For safe multipart POST request for PHP5.3 ~ PHP 5.4. *  * @param resource $ch cURL resource * @param array $assoc "name => value" * @param array $files "name => path" * @return bool */function curl_custom_postfields($ch, array $assoc = array(), array $files = array()) {        // invalid characters for "name" and "filename"    static $disallow = array("\0", "\"", "\r", "\n");        // build normal parameters    foreach ($assoc as $k => $v) {        $k = str_replace($disallow, "_", $k);        $body[] = implode("\r\n", array(            "Content-Disposition: form-data; name=\"{$k}\"",            "",            filter_var($v),         ));    }        // build file parameters    foreach ($files as $k => $v) {        switch (true) {            case false === $v = realpath(filter_var($v)):            case !is_file($v):            case !is_readable($v):                continue; // or return false, throw new InvalidArgumentException        }        $data = file_get_contents($v);        $v = call_user_func("end", explode(DIRECTORY_SEPARATOR, $v));        $k = str_replace($disallow, "_", $k);        $v = str_replace($disallow, "_", $v);        $body[] = implode("\r\n", array(            "Content-Disposition: form-data; name=\"{$k}\"; filename=\"{$v}\"",            "Content-Type: application/octet-stream",            "",            $data,         ));    }        // generate safe boundary     do {        $boundary = "---------------------" . md5(mt_rand() . microtime());    } while (preg_grep("/{$boundary}/", $body));        // add boundary for each parameters    array_walk($body, function (&$part) use ($boundary) {        $part = "--{$boundary}\r\n{$part}";    });        // add final boundary    $body[] = "--{$boundary}--";    $body[] = "";        // set options    return @curl_setopt_array($ch, array(        CURLOPT_POST       => true,        CURLOPT_POSTFIELDS => implode("\r\n", $body),        CURLOPT_HTTPHEADER => array(            "Expect: 100-continue",            "Content-Type: multipart/form-data; boundary={$boundary}", // change Content-Type        ),    ));}?>

Simple function to construct CURLFile from the file path:function makeCurlFile($file){$mime = mime_content_type($file);$info = pathinfo($file);$name = $info['basename'];$output = new CURLFile($file, $mime, $name);return $output;}Then construct an array of all the form fields you want to post. For each file upload just add the CURLFiles.$ch = curl_init("https://api.example.com");$mp3 =makeCurlFile($audio);$photo = makeCurlFile($picture);$data = array('mp3' => $mp3, 'picture' => $photo, 'name' => 'My latest single', 'description' => 'Check out my newest song');curl_setopt($ch, CURLOPT_POST,1);curl_setopt($ch, CURLOPT_POSTFIELDS, $data);$result = curl_exec($ch);if (curl_errno($ch)) {   $result = curl_error($ch);}curl_close ($ch);

CURLFile() is great with Content-Type: "multipart/form-data".But, if you want to upload just a single file (e.g. for the Wordpress media API), then you have to do this WITHOUT using CURLFile().  i.e.1. Set the relevant CURLOPT_HTTPHEADER values:"Content-Type: image/jpeg"  "Content-Disposition: attachment; filename=myfile.jpg"(where the content-type needs to be the appropriate mime-type for the uploaded file, and filename is the basename of the file).2. Post the file contents directly within CURLOPT_POSTFIELDS:file_get_contents($filename);

This is how to upload two or more files at once with cURLFile.With modern browser support, you can upload many files at one time if the multiple attribute is given.<input type="file" name="file[]" muliple />With outdated browser you can place many input elements to do that.<input type="file" name="file[]" /><input type="file" name="file[]" /><input type="file" name="file[]" />Here's the php code to handle multiple uploads.<?php    $cURLHandle = curl_init();    // ... more code ...    $postFields = array(        'file[0]' => new cURLFile($file1, $mimetype1, $basename1),        'file[1]' => new cURLFile($file2, $mimetype2, $basename2)    )        curl_setopt($cURLHandle, CURLOPT_POSTFIELDS, $fields);        // ... more code ...?>Each file's mimetype can be determined by finfo, and its basename can be fetched from $_FILES if it is uploaded from the client-end or by pathinfo() if it is locally stored.Don't leave the square brackets in ''file[0]'' empty like 'file[]', in that way only the last file will be received by the remote server.