PHP outputs the entire pyramid exercise

Question

<?php
$n = 10;
for($i = 1; $i <= $n; $i ++) {
    for($k = 1; $k <= $n - $i; $k ++) {
        echo " ";
    }
    for($j = 1; $j <= ($i - 1) * 2 + 1; $j ++) {
        echo '*';
    }
    echo '<br />';
}
?>

Please tell me why the following effect is displayed:

I have checked many times and cannot find the reason. Please give me some advice. Thank you!

Answer 1

Mine is the whole thing. What did you test it on?

Answer 2

The logic of your code is correct, but the use of   in the display takes up two ** characters, so it does not look like a pyramid. This may be related to the software problem you are debugging.

Answer 3

After inserting the codeecho " "; 改写成 echo " ";, test it in each browser to display the entire pyramid.
Thank you teachers for your guidance, thank you very much!