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benjaminpearson on 11/19/09

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Last Edited at 11/19/09 07:46pm

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PHP HTTP POST images & files

/ Published in: PHP

The following are instructions to "re-post" files that have been already been POSTed to your php script. This can help if you want to have a form (with file upload) that POSTs its data to your own script where the text elements can be handled and then the script POSTs the file for processing/storage on another system.

Basically the key is that you only POST the `$_FILES['tmp_name']` with an "@" symbol prepended.

Spent a good hour trying to figure this out. Thanks to gordon who posted on 08-Sep-2004 10:08 at http://theserverpages.com/php/manual/en/ref.curl.php

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<?php
$url = ''; // the url of the file processing script (ie, http://example.com/upload)

// Iterate through each file, check it has been stored in a tmp location, then post to another url
foreach ($_FILES as $file) {
  // tmp_name will look something like this /private/var/tmp/phpRDJDT92
  if ($file['tmp_name'] > '') {
    $params['file'] = '@'.$file['tmp_name']; // Its this @ symbol thats the key.
    $response = post($url, $params);
  }
}

function post($url, $params = array()) {
  try {
    $response = http_post($url, $params);
    return $response;
  } catch (Exception $e) {
    return null;
  }
}

// More REST methods available at http://snipplr.com/view/19781/php-rest/
// Nothing special about this cURL POST. You dont have to set any special headers for file uploading.
function http_post($url, $data) {
  $c = curl_init();
  curl_setopt($c, CURLOPT_URL, $url);
  curl_setopt($c, CURLOPT_POST, 1);
  curl_setopt($c, CURLOPT_SSL_VERIFYPEER, true);
  curl_setopt($c, CURLOPT_POSTFIELDS, $data);
  curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
  $output = curl_exec($c);
  curl_close($c);
  return $output;
}
?>

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