Get author ID of a post in wordpress

Question

Im creating a loop where it pulls info about a users activity. the code is on the author page and what i want to to is get the current author ID, so based on what author page the user is on it will fetch the ID of that author.

See below, i would want AUTHOR-ID to be the ID of the current author.

<script type="text/javascript">                             var pieData = [                             <?php                              $user_id = AUTHOR-ID;                              /* Get all categories */                             $rand = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f');                               $categories = get_terms( 'category', 'orderby=count&hide_empty=0' );                              /* Loop for each category to count the posts of the user */                             foreach($categories as $category)                             {                             $color = '#'.$rand[rand(0,15)].$rand[rand(0,15)].$rand[rand(0,15)].$rand[rand(0,15)].$rand[rand(0,15)].$rand[rand(0,15)];                                $cat_name = $category->name;                                $cat_id = $category->term_id;                                $post_count = count(get_posts("cat=$cat_id&post_author=$user_id"));                                 echo "                                              {                                                 value: ".$post_count.",                                                 color:'".$color."',                                                 label: ".$user_id."                                             },";                              }                             ?>                             ]                             var myPie = new Chart(document.getElementById("piec").getContext("2d")).Pie(pieData);                         </script> 

Answer 1

Try with this :

<?php $author_id=$post->post_author; ?> 

it will give you current author id.

or this one will helps you more:

global $current_user; get_currentuserinfo();                        $args = array(     'author'        =>  $current_user->ID, // I could also use $user_ID, right?             );  // get his posts 'ASC' $current_user_posts = get_posts( $args ); 

Thanks.