Question

    $var1 = "a<b>
        b<br>
        c
";

        $var2 = "a<b>
        b<br>
        c<br>
";

How can I detect and delete the <br> after the c in $var2?

Thanks.

Answer 1

What about a regex solution

preg_replace('#<br>\\s*$#', '', $var2);

it is also working with optional newlines and whitespace at the end of the string.

$ anchors the regex to the end of the string.

\s is a whitespace character (this includes newlines)

* means 0 or more

That means the regex matches a <br> followed by optional whitespace at the end of the string and preg_replace replaces it with an empty string.