<?php include("include/function.php"); // 1. 取得亂數 $handn = rand(1,3); // echo $handn; // 2. 設定檔名 if ( $handn == 1 ){ $hand ="scissors.png"; } elseif ( $handn == 2 ){ $hand ="rock.png"; } elseif ( $handn == 3 ){ $hand ="paper.png"; } // 3. 到正確的地方去 echo 檔名即可 // echo $hand; ?> body的部分: <div class="rand"> <img src="images/<?php echo"$hand"; ?>" /> </div>