How can I wrap text using Imagick in PHP so that it is drawn as multiline text?

Question

The Imagick library in PHP allows you to draw text on top of an image.

How can I tell Imagick to wrap the text based upon some bounded text box, so that the words ap

Answer 1

I found a bug with @BMiner's function where it returns a lineheight of 0 when there is only one word.

I ended up re-writing it in one loop using array functions. I kept the parameters the same so it works with current implementations.

I used preg_split instead so it works well with extra or double spaces, tabs, and line-breaks.

function wordWrapAnnotation($image, $draw, $text, $maxWidth)
{
    $words = preg_split('%\s%', $text, -1, PREG_SPLIT_NO_EMPTY);
    $lines = array();
    $i = 0;
    $lineHeight = 0;

    while (count($words) > 0)
    {
        $metrics = $image->queryFontMetrics($draw, implode(' ', array_slice($words, 0, ++$i)));
        $lineHeight = max($metrics['textHeight'], $lineHeight);

        if ($metrics['textWidth'] > $maxWidth or count($words) < $i)
        {
            $lines[] = implode(' ', array_slice($words, 0, --$i));
            $words = array_slice($words, $i);
            $i = 0;
        }
    }

    return array($lines, $lineHeight);
}