Setting the default value for a text field as a variable in Form API

Question

I thought this would be straight forward but my lack of drupal knowledge is holing me back. I want to grab the email from the logged in user, and set it as the default value of the form. I can grab the email from the global user logged in, but cannot pass this to the form?

The email field is blank, but I have the email stored in $email1 I want to place this value in the text box, as the default field.

global $user;
    $user_full = user_load($user->uid); 
    $email1= $user_full ->mail;
    echo $email1;

 $form['admin_email'] = array (
 '#type' => 'textfield',
 '#title' => t('Admin Email need email validation!!!'),
 '#description' => t('Please enter an Email'),
 '#default_value' => $user_full->mail,
 );

Answer 1

You don't need to use user_load($user->uid);. You already have a complete object inside global $user; variable. And don't forget PHP is not a natural languages. You can't just put whitespaces where you want them. In method call or property access, there should be no spaces around ->, it should be right next to object, and property should be right after arrow.

This line is sufficient for me:

'#default_value' => $user->mail,