php curl post with file (multipart)

curl.post.multipart.php

<?php

if ( ! function_exists('getCurlPostwithFile')){
  function getCurlPostwithFile($_url='', $_param=array(), $_file_name=array()){

    if($_url !=''){
      ini_set("memory_limit", "512M");

      $_file_data = array();
      foreach ($_file_name as $_key => $_val){
        $_file_data[] = array(
          'name' => $_key
          ,'filename' => basename($_val)
          //,'binary_data' => '바이너리'
          ,'binary_data' => file_get_contents($_val)
        );
      }
      $_data = $_param;

      $boundary = uniqid();
      $delimiter = '-------------' . $boundary;

      //make multipart data
      $_post_data = build_data_files($boundary, $_data, $_file_data);

      $_headers = array(
        "Content-Type: multipart/form-data; boundary=" . $delimiter
        ,"Content-Length: " . strlen($_post_data)
      );
      $curlObj = curl_init();
      curl_setopt($curlObj, CURLOPT_URL, $_url );
      curl_setopt($curlObj, CURLOPT_SSL_VERIFYPEER, false);
      curl_setopt($curlObj, CURLOPT_SSLVERSION, 1);
      curl_setopt($curlObj, CURLOPT_POST, true);
      curl_setopt($curlObj, CURLOPT_CUSTOMREQUEST, 'POST');
      curl_setopt($curlObj, CURLOPT_HEADER, false);
      curl_setopt($curlObj, CURLOPT_HTTPHEADER, $_headers);
      curl_setopt($curlObj, CURLOPT_RETURNTRANSFER, true);
      curl_setopt($curlObj, CURLOPT_POSTFIELDS, $_post_data);
      $response = curl_exec($curlObj);
      $_json = array();
      $_json = json_decode($response,true);
      curl_close($curlObj);
      return array(
        'response' => $response
        ,'json' => $_json
        ,'data' => $_post_data
      );
    }else{
      return false;
    }
  }
}
if ( ! function_exists('build_data_files')){
  // build multipart/formdata , multipart 폼데이터 만들기
  function build_data_files($boundary, $fields, $files){
    $data = '';
    $eol = "\r\n";
    $delimiter = '-------------' . $boundary;
    foreach ($fields as $name => $content) {
      $data .= "--" . $delimiter . $eol
        . 'Content-Disposition: form-data; name="' . $name . "\"".$eol.$eol
        . $content . $eol;
      }
    foreach ($files as $_key => $_val) {
      $data .= "--" . $delimiter . $eol
        . 'Content-Disposition: form-data; name="' . $_val['name'] . '"; filename="' . $_val['filename'] . '"' . $eol
        //. 'Content-Type: image/png'.$eol
        . 'Content-Transfer-Encoding: binary'.$eol;

      $data .= $eol;
          $data .= $_val['binary_data'] . $eol;
      }
    /*
      foreach ($files as $name => $content) {
      $data .= "--" . $delimiter . $eol
        . 'Content-Disposition: form-data; name="' . $name . '"; filename="' . $name . '"' . $eol
        //. 'Content-Type: image/png'.$eol
        . 'Content-Transfer-Encoding: binary'.$eol;

      $data .= $eol;
          $data .= $content . $eol;
      }
    */
      $data .= "--" . $delimiter . "--".$eol;
      return $data;
  }
}
//sample
$_url = 'url';
$_send_param = array(
  'param1' => 'param1'
  ,'param2' => 'param2'
);
$_file_name = array( 'file1' => 'file path(absolute path)');
$_tmp = getCurlPostwithFile($_url, $_send_param, $_file_name);
$_response = $_tmp['response'];
//$_response  = null;
$_json = $_tmp['json'];


?>