Diddling with arrays with numeric string keys

Question

To understand why I\'m asking this, read this and the comments under it. Consider the following code:

$obj = new stdClass;
$obj->{10} = \'Thing\';

$objArray          


        

Answer 1

You can try to remove it with array_splice(), if you know its offset ( foreach (...) { $offset++; ... } ), but storing data in an arrays like this, is really not a good idea. You should convert these objects to array with foreach:

foreach ( $obj as $key => $value )
    $array[$key] = $value;

Answer 2

Following pozs's advice, here's the resulting offsetUnset(). I also added a new offsetSet() which supports adding numeric keys.

public function offsetUnset($offset)
{
    $off = 0;

    foreach ($this->arr as $key => $value)
    {
        if ($key === $offset)
        {
            array_splice($this->arr, $off, 1);
            return;
        }
        $off++;
    }       
}

public function offsetSet($offset, $value)
{
    foreach($this->arr as $key => &$thevalue)
    {
        if ($key === $offset)
        {
            $thevalue = $value;
            return;
        }
    }

    // if $offset is *not* present...
    if ($offset === null)
    {
        $this->arr[] = $value;
    }
    // it's a numeric string key, now we have to hack it
    else if (strval(intval($offset)) === $offset)
    {
        // create new array via loophole:
        $tempObj = new stdClass;
        $tempObj->{$offset} = $value;

        // append to old array (+= doesn't create copies)
        $this->arr += (array) $tempObj;
        unset($tempObj);
    }
    // we are dealing with a normal key
    else
    {
        $this->arr[$offset] = $value;
    }
}

I've officially defeated PHP. Yay!