php發送接收文件流

<?php
    /** php 發送流文件 
    * @param  String  $url  接收的路徑 
    * @param  String  $file 要發送的文件 
    * @return boolean 
    */  
    function sendStreamFile($url, $file){  
      
        if(file_exists($file)){  
      
            $opts = array(  
                'http' => array(  
                    'method' => 'POST',  
                    'header' => 'content-type:application/x-www-form-urlencoded',  
                    'content' => file_get_contents($file)  
                )  
            );  
      
            $context = stream_context_create($opts);  
            $response = file_get_contents($url, false, $context);  
            $ret = json_decode($response, true);
            return $ret['success'];  
      
        }else{  
            return false;  
        }  
      
    }  
      
    $ret = sendStreamFile('http://127.0.0.1:81/stream.php', 'send.jpg');  
    var_dump($ret); 

    /** php 接收流文件 
    * @param  String  $file 接收後保存的文件名 
    * @return boolean 
    */  
    function receiveStreamFile($receiveFile){  
      
        $streamData = isset($GLOBALS['HTTP_RAW_POST_DATA'])? $GLOBALS['HTTP_RAW_POST_DATA'] : '';  
      
        if(empty($streamData)){  
            $streamData = file_get_contents('php://input');  
        }  
      
        if($streamData!=''){  
            $ret = file_put_contents($receiveFile, $streamData, true);  
        }else{  
            $ret = false;  
        }  
      
        return $ret;  
      
    }  
      
    $receiveFile = 'receive.jpg';  
    $ret = receiveStreamFile($receiveFile);  
    echo json_encode(array('success'=>(bool)$ret));   
?>