使用functions.php，我的网站变得空白

i'm creating a theme and i had a problem with functions.php file i used this code at firs

<?php 

 if(function_exists('register_sidebar')) 
 register_sidebar (array( 
 'name' =< 'follow us ', 
 'before_widget' => '<div class="widget">', 
 'after_widget' => '</div><!--End widget-cont--></div><!--End widget-->', 
 'before_title' => '<h2>', 
 'after_title' => '</h2><div class="widget-cont">', 
 )); 
 { 
 register_sidebar(); 
 } 
 ?>

and when i enter my website it get blank page and i get this

Parse error: syntax error, unexpected '=', expecting ')' in /home/u300164519/public_html/wp-content/themes/Abs Workout/functions.php on line 5

then i fixed the problem in line 5 and change it to this code

   <?php
 if(function_exists('register_sidebar'))
 register_sidebar (array( 
 'name' )< 'follow us ',
 'before_widget' )> '<div class="widget">' 
 'after_widget' => '</div><!--End widget-cont--></div><!--End widget-->',
 'before_title' => '<h2>',
 'after_title' => '</h2><div class="widget-cont">', 
  )); {
 register_sidebar(); 
 } 
 ?>

and again i get this!!!!

Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING in /home/u300164519/public_html/wp-content/themes/Abs Workout/functions.php on line 7

what dose that mean :(! please helpp meeee! i'm tired of this :(

You have a syntax error.

Try replacing 'name' )< 'follow us ' With 'name' => 'follow us '

and

'before_widget' )> '<div class="widget">' with 'before_widget' => '<div class="widget">'.

You need to have the array formatted this way:

array(
  key1 => value1,
  key2 => value2,
  keyN => valueN
);

Your code is invalid Its should be like

function my_side() {

 register_sidebar( array(
            'name' => 'box',
            'id' => 'box',
            'before_widget' => '<div id="%1$s" class="sidebar %2$s">',
            'after_widget' => '</div>',
            'before_title' => '<h3>',
            'after_title' => '</h3>',
        ) );

}

add_action( 'widgets_init', 'my_side' );