Possible Duplicate:
Check if a variable is empty
Simple PHP question:
I have this stement:
if (isset($_POST["password"]) && ($_POST["password"]=="$password")) {
...//IF PASSWORD IS CORRECT STUFF WILL HAPPEN HERE
}
Somewhere above this statement I use the following line in my JavaScript to set the username as a variable both in my JavaScript and in my PHP:
uservariable = <?php $user = $_POST['user']; print ("\"" . $user . "\"")?>;
What I want to do is add a condition to make sure $user is not null or an empty string (it doesn't have to be any particular value, I just don't want it to be empty. What is the proper way to do this?
I know this is a sill question but I have no experience with PHP. Please advise, Thank you!
Null OR an empty string?
if (!empty($user)) {}
Use empty().
After realizing that $user ~= $_POST['user'] (thanks matt):
var uservariable='<?php
echo ((array_key_exists('user',$_POST)) || (!empty($_POST['user']))) ? $_POST['user'] : 'Empty Username Input';
?>';