Question

I’ve got a submission page in php with an html form that points back to the same page. I’d like to be able to check if the required fields in the form aren’t filled so I can inform the user. I’d like to know how to do that with php and javascript each. However, I imagine this is a common issue so any other answers are welcome.

Answer 1

Do the check in posting part of your php

    if(isset($_POST['save']))     {             $fields=array();             $fields['Nimi']   = $_POST['name'];             $fields['Kool'] = $_POST['school'];             $fields['Aadress'] = $_POST['address'];             $fields['Telefon'] = $_POST['phone'];             $fields['Email'] = $_POST['email'];              foreach ($fields as $key => $val)             {   if(trim($val)=='')                 {   $errmsg=$key.' is not filled!';                     break;                 }             }     }  if($errmsg == '') { //do your saving here   exit(); }  if(!isset($_POST['save']) || $errmsg != '') { //show your form here  // and make it to return to the same page on submit  //<input name='save' type='submit' value='Save' onclick='return true;'> }