Question

I basically want to use str_replace() all values of a multidimensional array. I can’t seem to work out how I would do this for multidimensional arrays. I get a little stuck when the value is an array — it just seems to be in a neverending loop. I’m new to PHP so examples would be helpful.

function _replace_amp($post = array(), $new_post = array())
{
    foreach($post as $key => $value)
    {
        if (is_array($value))
        {
           unset($post[$key]);
           $this->_replace_amp($post, $new_post);
        }
        else
        {
            // Replace :amp; for & as the & would split into different vars.
            $new_post[$key] = str_replace(':amp;', '&', $value);
            unset($post[$key]);
        }
    }

    return $new_post;
}

Answer 1

This is wrong and will put you into a never-ending loop:

$this->_replace_amp($post, $new_post);

You don’t need to send new_post as an argument, and you also want to make the problem smaller for each recursion. Change your function to something like this:

function _replace_amp($post = array())
{
    $new_post = array();
    foreach($post as $key => $value)
    {
        if (is_array($value))
        {
           unset($post[$key]);
           $new_post[$key] = $this->_replace_amp($value);
        }
        else
        {
            // Replace :amp; for & as the & would split into different vars.
            $new_post[$key] = str_replace(':amp;', '&', $value);
            unset($post[$key]);
        }
    }

    return $new_post;
}