为什么echo只从PHP数组中打印一个值？

Question

I got the following code:

$comments = $db->QueryFetchArray("SELECT * FROM `ycommentbox` WHERE `url`='".$id."'");
foreach ($comments as $comment) {
    echo $comment;
}

which echoes:

"test121677129055"

"ycomemntbox" structure:

Why isn't it echoing the other 2 rows but just the first one?

It should echo this:

"test121677129055"
"test221677129056"
"test321677129057"

Answer 1

Because QueryFetchArray only returns a single row; it's only an array because it includes all the column values from that row.

To get all the rows, you need to either do QueryFetchAll to get them in one big array, or do an initial Query followed by FetchArray in a loop that will run once per row.

Answer 2

Try this

And your id wants to match with this query :

 $comments = $db->QueryFetchAll("SELECT * FROM `ycommentbox` WHERE `url`='".$id."'");
    foreach ($comments as $comment) {
        echo $comment;
    }

OR you can change this query like this

$comments = $db->QueryFetchAll("SELECT * FROM `ycommentbox`");
        foreach ($comments as $comment) {
            echo $comment;
        }

Answer 3

You can use print_r for multiple values
and use echo for single value ok
OR:
If you use only echo then use echo & tr td html tags between "" .
Write starting tags in "" and .$variable . and again end tags between `""

Answer 4

For loop looks ok, so I can suggest first to make a {echo count($comments);} to check actually how many rows returned by the query. It will validate the query first.