Question

How do you insert a string before a number?

I have the following WordPress function:

get_the_term_list( $post->ID, 'level', '', ', ', '' )

This function outputs numbers like so:

<a href="#">1</a>

or, if there is more than one entry in the database:

<a href="#">1</a>, <a href="#">2</a>

How can I insert “level ” before the number? so that it looks like this:

<a href="#">level 1</a>

Or:

<a href="#">level 1</a>, <a href="#">level 2</a>

Answer 1

You simply match the number. In a regex \d+ can be used for decimals.

 $text = preg_replace('#>(\d+)<#', '>level $1<', $text);

And you can just use > and < anchors. Here $1 reinserts the found decimal.