echo一个字符串，用br和水平标签替换nl和一些html字符

Question

For debugging I want to echo or print my MySQL with html replacements for the nl and horizontal tabs.

$sql="
SELECT
    *
FROM
    `mytable`;";

I can do echo nl2br($sql); in order to replace \\n with <br /> . This gives me the screen output:

SELECT
*
FROM
`mytable`;

Now I want to swap the horizontal tabs for something like   in order to indent them on the screen.

What could I use instead of   , I've never liked it?

Thanks

Answer 1

您可以使用HTML <pre>标记。

echo '<pre>' . $sql . '</pre>';