note extension for sure html but for markup i make it js

php requests function.js

 public static function postRequest($url, $postData, $headers){
      //init curl:
      $ch = curl_init($url);
      // Configuring curl options
      $options = array(
          CURLOPT_CUSTOMREQUEST => 'POST',
          CURLOPT_RETURNTRANSFER => true,
          CURLOPT_POSTFIELDS => $postData,
          CURLOPT_HTTPHEADER => $headers
      );

      // Setting curl options
      curl_setopt_array( $ch, $options );

      // Getting results
      $result = curl_exec($ch); // Getting jSON result string

      $info = curl_getinfo($ch);
      curl_close($ch);

      $responseCode = $info['http_code'];

      return $result;
}

public static function deleteRequest($url, $headers){
    $url = $url;
    $options = array(
        CURLOPT_RETURNTRANSFER=> TRUE,
        CURLOPT_CUSTOMREQUEST => 'DELETE',
        CURLOPT_HTTPHEADER => $headers
    );
    $ch = curl_init($url);
    curl_setopt_array($ch, $options);

    $result = curl_exec($ch);

    return $result;
}

// patch request:
public static function patchRequest($url, $patchData, $headers){
    //init curl:
    $ch = curl_init($url);
    // Configuring curl options
    $options = array(
        CURLOPT_CUSTOMREQUEST => 'PATCH',
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_POSTFIELDS => $patchData,
        CURLOPT_HTTPHEADER => $headers
    );
    
    // Setting curl options
    curl_setopt_array( $ch, $options );

    // Getting results
    $result = curl_exec($ch); // Getting jSON result string

    $info = curl_getinfo($ch);
    curl_close($ch);

    $responseCode = $info['http_code'];

    return $result;
}

public static function getRequest($url){
    $url = $url;
    $options = array(
        CURLOPT_RETURNTRANSFER=> TRUE,
        CURLOPT_CUSTOMREQUEST => 'GET'
    );
    $ch = curl_init($url);
    curl_setopt_array($ch, $options);

    $result = curl_exec($ch);

    return $result;
}

upload file to php.js

//function to upload files to server:
/// inputName: input name in the form
/// allowedExt: allowed extensions as array
/// dir folder to upload file to should be already created look ex:
// ex: /uploads/ -> upload folder in the root dir
// will rename the file to the time in mill sec and the extension.
// max size in Byte
function uploadFile($inputName, $allowedExt, $dir, $maxSize){
    $currentDir = getcwd();
    //dir should be already created
    $uploadDirectory = $dir;

    $errors = []; // Store all errors here

    $fileName = $_FILES[$inputName]['name'];
    $fileSize = $_FILES[$inputName]['size'];
    $fileTmpName  = $_FILES[$inputName]['tmp_name'];
    $fileType = $_FILES[$inputName]['type'];
    $fileExtension = strtolower(end(explode('.',$fileName)));

    $newFileName = time() . '.' .$fileExtension ;

    $uploadPath = $currentDir . $uploadDirectory . basename($newFileName); 

    //check if there extension validate:
    if($allowedExt != null){
        if (! in_array($fileExtension, $allowedExt)) {
            $errors[] = "This file extension is not allowed. Please upload a JPEG or PNG file";
        }
    }
    

    if ($fileSize > $maxSize) {
        $errors[] = "This file is more than ". $maxSize/1000000 ." MB. Sorry, it has to be less than or equal to ". $maxSize/1000000 ." MB";
    }

    if (empty($errors)) {
        $didUpload = move_uploaded_file($fileTmpName, $uploadPath);

        if ($didUpload) {
            return $uploadPath;
        } else {
            echo "An error occurred somewhere. Try again or contact the admin";
        }
    } else {
        foreach ($errors as $error) {
            echo $error . "These are the errors" . "\n";
        }
    }
}