Validator to check if file already exists before uploading

[waubain]

I looked through the documentation, but I could not see a Validator that checks if a file exists. I saw the GetFileUploadValidator, but that did not seem to contain a file check.

I could create an array of all the files in a directory/folder, and then using InArray Validator, but I would prefer to do is alert the user of the duplication and then give the option to Cancel or Overwrite the current file.

Here is my current Validator/Filter with the InArray validator added.

/**
 * Configure the upload element
 * Filters: (None)
 * Validators: FileUpload (Added automatically)
 */
$upload = new Quform_Element_File('upload');
$upload->addFilters(array('trim', 'filename'));
$upload->addValidator('inArray', array('haystack' => $curFiles));
$upload->getFileUploadValidator()
->setRequired(true)
->setAllowedExtensions(array('pdf'))
->setMaximumFileSize(10485760);
$form->addElement($upload);

[waubain]

I realized that ‘inArray’ will not work at this point since the ‘filename’ does not yet exist until farther in the code.

[waubain]

The below piece of code works in a test page, but I don’t know where I can place it to make it work properly within your code, if at all.

The form is being used to upload a file to a directory and not to send an email or to a database.

            /** Create an array of file names in handout directory to check if file already exists **/
                $dir = '../../handouts';
                // get directory files
                $dirfilenames = scandir($dir);
                //get name of file to be uploaded
                $files = $form->getValue('upload');
                $filename = $files[0]['filename'];
                //check if file exists
                foreach( $dirfilenames as $value ){
                  if( $value == $filename ){
                        //terminating script with a message using exit() 
                        exit('File already exists!'); 
                    }
                }
                /** End of file exists check **/
                
            // Save to a MySQL database

[Ally]

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[waubain]

Works perfectly. Thank you for the code and a great product.

[Author]

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