callbackUpload(string $fieldName, callable $callback)

The callbackUpload is used when we need to replace the default upload functionality of Grocery CRUD Enterprise.

For example the below code will show us an error at the page (so we can dump the data after the upload):

$crud->callbackUpload(function ($test1 = null) {

    return false;

will result the below output:

object(stdClass)#85 (5) {
  ["fieldName"] => string(9) "photo_url"
  ["uploadFieldName"] => string(28) "photo_url__gcrud_upload"
  ["uploadPath"] => string(81) "/path/to/project/Uploads"
  ["maxUploadSize"] => string(3) "20M"
  ["minUploadSize"] => string(2) "1B"
  ["allowedFileTypes"] => array(4) {
    [0] => string(3) "gif"
    [1] => string(4) "jpeg"
    [2] => string(3) "jpg"
    [3] => string(3) "png"

Please have in mind that this is completely replacing the functionality of the default upload. That means that once you use this function you will need to make sure that:

For example you can see a full working example below. The example is pretty big as it handles all of the above bullet points.

// At this example we are using the Grocery CRUD Upload library. 
// However, you can replace it with any other library you wish! 
// Just make sure that you are returning the correct values as the below example.

$crud->callbackUpload(function ($uploadData)  {

    $uploadPath = $uploadData->uploadPath;
    $fieldName = $uploadData->uploadFieldName;
    $allowedFileTypes = $uploadData->allowedFileTypes;
    $maxUploadSize = $uploadData->maxUploadSize;
    $minUploadSize = $uploadData->minUploadSize;

    $uploader = new \GroceryCrud\Core\Upload\Upload($fieldName, $uploadPath);


    if ($uploader->validate() === true) {
    } else {
        $errors = "- " . implode("\n -", $uploader->getValidationErrors());
        return (new \GroceryCrud\Core\Error\ErrorMessage())->setMessage("There were some validation errors with the upload:\n" . $errors);

    $uploadResult = $uploader->getUploadedFiles()->getFirstUploadedFile();

    return (object)[
        'uploadResult' => $uploadResult,
        'stateParameters' => $uploadData