Validate Email Address With Filter_Var

[Tutt 0]

I would like to see an example of the filter_var() used to validate an email address in register.php from Chapter 8 Review and Pursue. I've tried a million things but it's not catching errors correctly so I think my IF conditional is off.

 

// original code for email validation:

if (empty($_POST['email']) || (substr_count($_POST['email'], '@') != 1) ) {

$problem = TRUE;

print '<p class="error">Please enter your email address!</p>';

}

 

Thank you!

Jill

[Larry 433]

Sure, that'd be:

if (!filter_var($_POST['email'], FILTER_VALIDATE_EMAIL)) {
   $problem = TRUE;
   // Etc.

 

I'd be inclined to add an isset() clause to that conditional, too, but that's a minor point.

[phpRob 10]

I'm still a little confused understanding the differences between the empty() or isset() functions. In the above you suggest using the isset() clause on the 'email' variable, would it not work with empty()?. Think I remember reading you'd use isset on checkboxes, radio buttons alike.

 

Please explain?

[phpRob 10]

Just found this post which kinda answers my question

[Larry 433]

Yep. Let me know if you'd like further clarification.

[phpRob 10]

From my basic knowledge and brief reading isset() checks to see if a value has been set and empty() checks to see if a variable is empty, 0 or NULL? Please correct me if I'm wrong Larry!

[Larry 433]

Yes, that's correct. And the main distinction in terms of form validation is that a variable can be set but still empty (e.g., an empty string).

[phpRob 10]

Yes, that's correct. And the main distinction in terms of form validation is that a variable can be set but still empty (e.g., an empty string).

 

PHP might actually be sinking in after all hey Larry!