CURL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');
CURL上传文件
1.PHP5.5之前使用CURL上传文件
第一种写法,PHP版本要求 < 5.5
$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, $form_name);
2.PHP5.5之后使用CURL上传文件
第二种写法(推荐),PHP版本 >= 5.5
filename 需要上传的文件,建议使用绝对路径
mimetype: 默认是 application/octet-stream,此处留空
postname: 接收方$_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);
3.PHP发送文件流上传文件
/*
* 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);
4.HTTP报文方式上传文件
/**
* @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 . "
";
$data .= 'Content-Disposition: form-data; name="' . $name . '"';
$data .= "
" . $content . "
";
}
// 将上传的文件生成主体字符串
foreach ($fileFields as $name => $file) {
$data .= "--" . $delimiter . "
";
$data .= 'Content-Disposition: form-data; name="' . $name . '"; filename="' . $file['name'] . ""
";
$data .= 'Content-Type: ' . $file['type'] . "
";
$data .= $file['content'] . "
";
}
// 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);
}