php模拟post上传图片实现代码

<?php 
$psn_id = "1fbahh"; 
$url = SERVER_URL . '/get_imginfo.php'; 
//SERVER_URL为我自己定义的常量，其值为：http://localhost:8080/phpClientSer 
$ans = postData_json($url, "psn_id=$psn_id");//postData_json()和postData()在check.php 
 
print_r($ans); 
 
if ($ans['count'] > 0) { 
 if (!file_exists("org")) { 
  mkdir("org"); 
  mkdir("org/resouse/"); //从服务器读取过来的原图片存放路径 
  mkdir("org/w100/"); //把上目录中临时存放的图片处理为宽度100后存放的路径 
  mkdir("org/temp/"); //出来gif图片是的临时mul 
 } 
 foreach ($ans['pdt_id'] as $k => $pdt_id) { 
  $img = "org/resouse/" . $pdt_id . $ans['img_style'][$k]; 
 
  $url = SERVER_URL . '/get_stream.php';//访问服务器的路径 
  $postString = $ans['img_url'][$k]; //传递的参数[服务器上图片的路径] 
  $stream = postData($url, "img_url=" . $ans['img_url'][$k]);//从服务器读取的图片内容 
  $file = fopen($img, "w+"); //打开文件准备写入 
  fwrite($file, $stream); //写入 
  fclose($file); //关闭 
 
  $image_resize = new image_resize(); 
  $image_resize->act($img, $pdt_id);//处理图片 
 
  $img_u = "org/w100/" . $pdt_id . $ans['img_style'][$k];//处理后图片的存放路径 
   
  //下面的代码是把处理过的图片转为二进制传到服务器，问题就出在这段代码 
  $stm = file_get_contents($img_u); 
  $url = SERVER_URL . '/create_img.php'; 
  $postString = "pdt_id=$pdt_id&img_style=" . $ans['img_style'][$k] . "&img_stm=" . $stm; 
  $move = postData($url, $postString); 
  echo "result---------" . $move . "\r\n"; 
 } 
} 
?> 

function postData($remote_server, $post_string) { 
 $context = array( 
  'http' => array( 
   'method' => 'POST', 
   'header' => 'Content-type: application/x-www-form-urlencoded' . 
   '\r\n' . 'User-Agent : Jimmy\'s POST Example beta' . 
   '\r\n' . 'Content-length:' . strlen($post_string) + 8, 
   'content' => $post_string) 
 ); 
 $stream_context = stream_context_create($context); 
 $data = file_get_contents($remote_server, false, $stream_context); 
 return $data; 
} 
 
function postData_json($remote_server, $post_string) { 
 $context = array( 
  'http' => array( 
   'method' => 'POST', 
   'header' => 'Content-type: application/x-www-form-urlencoded' . 
   '\r\n' . 'User-Agent : Jimmy\'s POST Example beta' . 
   '\r\n' . 'Content-length:' . strlen($post_string) + 8, 
   'content' => $post_string) 
 ); 
 $stream_context = stream_context_create($context); 
 $data = file_get_contents($remote_server, false, $stream_context); 
  
 return json_decode($data, true); 
} 

$img_url = $_POST['img_url']; 
$stream = file_get_contents($img_url); 
echo $stream;

$img_stm = $_POST['img_stm']; 
$pdt_id = $_POST['pdt_id']; 
$img_style = $_POST['img_style']; 
 
$img_url = $_SERVER['DOCUMENT_ROOT'] . "upload2/w100/" . $pdt_id . $img_style; 
$file = fopen($img_url,"w+");//打开文件准备写入 
 
fwrite($file,$img_stm);//写入 
fclose($file);//关闭 
echo "ok";