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

Issue

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 appear as multiline text rather than a single line?

Solution

I have been using @Sarke's version successfully for a while, but I noticed there is an infinite loop if a word is longer than the $maxWidth. Here is a version that fixes the infinite loop:

function wordWrapAnnotation($image, $draw, $text, $maxWidth)
{   
    $text = trim($text);

    $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);

        // check if we have found the word that exceeds the line width
        if ($metrics['textWidth'] > $maxWidth or count($words) < $i) 
        {   
            // handle case where a single word is longer than the allowed line width (just add this as a word on its own line?)
            if ($i == 1)
                $i++;

            $lines[] = implode(' ', array_slice($words, 0, --$i));
            $words = array_slice($words, $i);
            $i = 0;
        }   
    }   

    return array($lines, $lineHeight);
}

Answered By - John Langford

Answer Checked By - Clifford M. (PHPFixing Volunteer)