PHP回显标签中的代码？ [重复]

Question

This question already has an answer here:

• Reference - What does this error mean in PHP? 34 answers

for some reason unless im overlooking something, This block of code here:

<?
include_once("connect.php");
$sql = "SELECT * FROM categories ORDER BY category_title ASC";
$res = mysqli_query($con,$sql) or die(mysql_error());
$categories ="";
if (mysqli_num_rows($res) > 0) {
    while($row = mysqli_fetch_assoc($res)){
        $id = $row['id'];
        $title = $row['category_title'];
        $description = $row['category_decription'];
        $categories .= "<a href='#' class='cat_links'>".$title." - <font size='-1'>".$description."</font></a>";
    }
    echo $categories;
} else {

    echo"<p>There are no categories available yet.</p>";
}

?>

Seems to echo this out onto the page:

0) { while($row = mysqli_fetch_assoc($res)){ $id = $row['id']; $title = $row['category_title']; $description = $row['category_decription']; $categories .= "".$title." - ".$description.""; } echo $categories; } else { echo" There are no categories available yet.

"; } ?>

What have i done wrong?

Thanks in advance!

</div>

Answer 1

Change your tags from <? to <?php. Short tags can be disabled via a configuration setting, and are often turned off in production.