Home > Article > Backend Development > PHP使用CURL上传|下载文件
/** * @param string $img_url 下载文件地址 * @param string $save_path 下载文件保存目录 * @param string $filename 下载文件保存名称 * @return bool */function curlDownFile($img_url, $save_path = '', $filename = '') { if (trim($img_url) == '') { return false; } if (trim($save_path) == '') { $save_path = './'; } //创建保存目录 if (!file_exists($save_path) && !mkdir($save_path, 0777, true)) { return false; } if (trim($filename) == '') { $img_ext = strrchr($img_url, '.'); $img_exts = array('.gif', '.jpg', '.png'); if (!in_array($img_ext, $img_exts)) { return false; } $filename = time() . $img_ext; } // curl下载文件 $ch = curl_init(); $timeout = 5; curl_setopt($ch, CURLOPT_URL, $img_url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout); $img = curl_exec($ch); curl_close($ch); // 保存文件到制定路径 file_put_contents($filename, $img); unset($img, $url); return true;}// 执行函数之后,会在当前文件的同一目录下生成下载好的图片curlDownFile('http://mimg.127.net/logo/163logo.gif');
第一种写法,PHP版本要求
$filename 是文件路径,必须有
filename=test.txt 是接收方收到的文件名,为空时 则取 filename 文件路径中的 basename部分
type=text/plain 文档类型,可以为空
/** * @param string $target_url 上传目标地址 * @param string $filename 上传文件路径 * @param string $form_name 表单名称 */function curlUploadFile($target_url, $filename, $form_name) { $post_data = array( $form_name => "@$filename;filename=test.txt;type=text/plain", ); $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $target_url); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); $result = curl_exec($ch); curl_close($ch);}$target_url = 'http://www.codean.net/notFound/test.php';$filename = realpath("C:/Users/HelloWorld/Desktop/Images/1.jpg");$form_name = 'file';// 接收端使用$_FILES接受curlUploadFile($target_url, $filename, $form_name);
第二种写法(推荐),PHP版本 >= 5.5
filename 需要上传的文件,建议使用绝对路径
mimetype: 默认是 application/octet-stream,此处留空
postname: 接收方$_FILES数组中的文件名,默认为文件名
/** * @param string $target_url 上传目标地址 * @param string $filename 上传文件路径 * @param string $form_name 表单名称 */function curlUploadFile($target_url, $filename, $form_name) { $upload_file = new CURLFile($filename); $post_data = array( $form_name => $upload_file ); $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $target_url); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); $result = curl_exec($ch); curl_close($ch);}$target_url = 'http://www.codean.net/notFound/test.php';$filename = realpath("C:/Users/HelloWorld/Desktop/Images/1.jpg");$form_name = 'file';// 接收端使用$_FILES接受curlUploadFile($target_url, $filename, $form_name);
/* * 第三种写法,使用PHP流发送 * @param string $target_url 上传目标地址 */function curlUploadFile($target_url) { $fh = fopen('php://temp', 'rw+'); $string = 'Hello World'; fwrite($fh, $string); rewind($fh); $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $target_url); curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 2); curl_setopt($ch, CURLOPT_PUT, true); curl_setopt($ch, CURLOPT_INFILE, $fh); curl_setopt($ch, CURLOPT_INFILESIZE, strlen($string)); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); $result = curl_exec($ch); curl_close($ch);}$target_url = 'http://www.codean.net/notFound/test.php';curlUploadFile($target_url);// 接收端取出流文件并保存$putdata = fopen('php://input', 'r');$fp = fopen('test.txt', 'w');while ($data = fread($putdata, 1024)) { fwrite($fp, $data);}fclose($fp);fclose($putdata);
/** * @param string $target_url 文件上传地址 */function curlUploadFile($target_url) { // 生成分隔符 $delimiter = '-------------' . uniqid(); // 需要上传的文件数组 $fileFields = array( 'file' => array( 'name' => 'test.png', 'type' => 'text/html', 'content' => 'This is my file content.' ), ); // 后端接受的$_POST的数组值 $postFields = array( 'file' => 'file', ); $data = ''; // 先将post的普通数据生成主体字符串 foreach ($postFields as $name => $content) { $data .= "--" . $delimiter . "\r\n"; $data .= 'Content-Disposition: form-data; name="' . $name . '"'; $data .= "\r\n\r\n" . $content . "\r\n"; } // 将上传的文件生成主体字符串 foreach ($fileFields as $name => $file) { $data .= "--" . $delimiter . "\r\n"; $data .= 'Content-Disposition: form-data; name="' . $name . '"; filename="' . $file['name'] . "\" \r\n"; $data .= 'Content-Type: ' . $file['type'] . "\r\n\r\n"; $data .= $file['content'] . "\r\n"; } // 主体结束的分隔符 $data .= "--" . $delimiter . "--"; // curl上传文件 $handle = curl_init($target_url); curl_setopt($handle, CURLOPT_POST, true); curl_setopt($handle, CURLOPT_HTTPHEADER, array( 'Content-Type: multipart/form-data; boundary=' . $delimiter, 'Content-Length: ' . strlen($data)) ); curl_setopt($handle, CURLOPT_RETURNTRANSFER, 1); curl_setopt($handle, CURLOPT_POSTFIELDS, $data); $result = curl_exec($handle); curl_close($handle);}