Amit Dhamu

Software Engineer

Ignore nl2br() Inside Pre/Code Tag

To ensure new lines are saved as <br>'s, I use PHPs built-in nl2br() function.

Inside an article however which may have a mixture of content such as <pre> or <code> tags, you don't want new lines created inside the content of those tags.

Therefore, I suggest using the function below.

# Change <code> for <pre> if required
function codenl2br($string) {
    $string = str_replace("n", "<br>", $string);

    if (preg_match_all('/<code>(.*?)</code>/', $string, $match)) {
        foreach ($match as $a) {
            foreach ($a as $b) {
                $string = str_replace('<code>' . $b . '</code>', "<code>" . str_replace("<br>", "", $b) . "</code>", $string);
            }
        }
    }
    return $string;
}

Credits


 nl2br / code / pre / line break / php

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