Tema Hatası var ne yapmalıyım?

Warning: move_uploaded_file() expects parameter 2 to be string, array given in /home/acikogre/public_html/......./wp-content/themes/....../ilan-ekle.php on line 61

60.	$file_name[$i]="fresim/".$rastgele.$file_name[$i];
61.	move_uploaded_file($_FILES["file_name"]["tmp_name"],$file_name);