How to upload a file to remote server in php using curl

To upload  files using CURL please check your curl on remote server must be enabled.


All uploading functionality will be done at local server and using base64_encode we will copy our  local uploaded file to remove server.



Create two files :

1. local.php  -  for local server to upload file in local server.
2. server.php - for live remote server to copy local uploaded file.

1. Script for local.php

<form enctype="multipart/form-data" method='post'>
  <input name="file" type="file" value="choose">
  <input type="submit" value="Upload">
</form>

<?php
if(isset($_POST["submit"])){
    // Move file to a temp location
    $uploadDir = 'your local upload directory path here';
    $uploadFile = $uploadDir . basename($_FILES['file']['name']);
    if (move_uploaded_file($_FILES['file']['tmp_name'], $uploadFile)){
        
        // set array to send data to remote server
        $remoteData = array(
            'fileName' => $uploadFile,
            'fileData' => base64_encode($uploadFile)
        );

        // start curl set up for remote file upload
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, 'http://your-server/server.php');
        curl_setopt($curl, CURLOPT_TIMEOUT, 30);
        curl_setopt($curl, CURLOPT_POST, 1);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($curl, CURLOPT_POSTFIELDS, $remoteData);
        $response = curl_exec($curl);
        curl_close($curl);
        echo $response;   // set response to server.php file 
    } else {
        echo "Your file not uploaded to server.";
    }
} ?> 



2.  Script for server.php
 

<?php
// check if post data is available or not
if (isset($_POST['fileName']) && $_POST['fileData']){
    // save uploaded file
    $uploadDir = 'your path to save file';
    file_put_contents(
        $uploadDir. $_POST['fileName'],
        base64_decode($_POST['fileData'])
    );// done  

   echo "Success";  

} else { 

   echo "Error : File not uploaded to remote server."; 

} ?>