PHP Replace Last Occurence of a String in a String?

Question

Anyone know of a very fast way to replace the last occurrence of a string with another string in a string?

Answer 1

You can use this function:

function str_lreplace($search, $replace, $subject)
{
    $pos = strrpos($subject, $search);

    if($pos === false)
    {
        return $subject;
    }
    else
    {
        return substr_replace($subject, $replace, $pos, strlen($search));
    }
}

Source

Answer 2

This will also work:

function str_lreplace($search, $replace, $subject)
{
    return preg_replace('~(.*)' . preg_quote($search, '~') . '(.*?)~', '$1' . $replace . '$2', $subject, 1);
}

UPDATE Slightly more concise version (http://ideone.com/B8i4o):

function str_lreplace($search, $replace, $subject)
{
    return preg_replace('~(.*)' . preg_quote($search, '~') . '~', '$1' . $replace, $subject, 1);
}