White spaces throwing off HTML form validation

Question

When using: if (empty($_POST['Username'])){ .. } The user can input a number of whitespaces so therefore the post is technically not empty, so it continues the insert into my database. I want the fields to contain text.. Is there a way to perform this?

**1)** use `trim()`, **2)** In the HTML part use the attribute `required` **3)** HTML5 even supports the attribute `pattern` to validate the input with regex. — HamZa, May 26 '13 at 16:35

score 5 · Accepted Answer · answered May 26 '13 at 16:34

5

Use the trim() function.

if (empty(trim($_POST['Username']))){ .. }

answered May 26 '13 at 16:34

Tom Naessens

1,827
22
38

score 2 · Answer 2 · answered May 26 '13 at 16:34

2

How about;

if (empty($_POST['Username']) || trim($_POST['Username'] == ""){

This will check if the POST key value is empty, but if it is not.. It will remove all whitespaces and then check if it's equal to nothing

answered May 26 '13 at 16:34

Daryl Gill

5,464
9
36
69

White spaces throwing off HTML form validation

2 Answers2

Linked