I have the following code which works by itself but when I try it on wordpress, it shows the login but when I click on submit, it does not submit the form, and goes to following address and shows a white page.
http://localhost:8080/wordpress/wp-admin/admin.php
<form method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
Username <input type="text" name="username" />
<br />
Password <input type="password" name="password" />
<br />
<input type="submit" value="Login" />
<?php
if(isset($_POST["username"])
....
You should perhaps go into more detail of what you are trying to achieve.
Any reason you are not using wp_login_form()?
As for the white screen, I would also recommend to turn on debugging, inside your wp-config.php file is the line
define('WP_DEBUG', false);. Change that to true. ( I can only also assume the login showed a white screen because of missing nonce fields, which would go away with using wp_login_form() )Add name attribute in the form field