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1. hp3
   Member
   Posted 1 year ago #

   I have a front end form with file upload that limits files to certain types. I need to display an error message if a user submits a file in an unsupported format.

   File upload works correctly and I can limit uploads to certain types using the below function. I've added this function to the theme functions.php.

   // limit front end upload to image formats only
   add_filter('upload_mimes', 'image_upload_mimes');
   function image_upload_mimes ( $existing_mimes=array() ) {	
   
   	// remove all mime types
   	unset($existing_mimes);
   	$existing_mimes = array('jpg|jpeg|jpe' => 'image/jpeg',
   							'gif' => 'image/gif',
   							'png' => 'image/png',
   							'bmp' => 'image/bmp',
   							'tif|tiff' => 'image/tiff');
   
   	// and return the new list of mimes
   	return $existing_mimes;
   }

   If the user submits an unsupported format, I would like to display an error message indicating that the format is not supported. I believe that the back end has a built in feature for this.

   How do I detect that an uploaded format is unsupported from the front end?

2. hp3
   Member
   Posted 1 year ago #

   I found the is_wp_error() function to determine if there is a word press error, such as attempting to upload an unsubpported file type, and the get_error_message() function to show the error message.

   if ( $file_err_check === UPLOAD_ERR_OK){ // no error in file upload
       $newupload = insert_attachment($file,$pid); // $newupload returns the attachment id of the file
   
       // check for word press error, like file not supported
       if (is_wp_error($newupload)) {
            $error_string = $newupload->get_error_message();
            echo '<div id="message" class="error"><p>' . $error_string . '</p></div>';
       }
   }

   Is there a way to customize the wording of word press errors from a lanaguage file?

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