annotate english or chinese text on image

annotate.php

<?php
header('Content-Type: text/html; charset=utf-8');
mb_internal_encoding('utf-8');

function wordWrapAnnotation(&$image, &$draw, $text, $maxWidth)
{
    // separate the text by chinese characters or words or spaces
    preg_match_all('/([\w]+)|(.)/u', $text, $matches);
	
    // $words is array of Chinese characters, English Words or spaces
    $words = $matches[0];
    $lines = array();
    $i = 0;
    $lineHeight = 0;
    while($i < count($words) )
    {
        $currentLine = $words[$i];
        if($i+1 >= count($words))
        {
            $lines[] = $currentLine;
            break;
        }
        //Check to see if we can add another word to this line
        $metrics = $image->queryFontMetrics($draw, $currentLine . $words[$i+1]);
        while($metrics['textWidth'] <= $maxWidth)
        {
            //If so, do it and keep doing it!
            $currentLine .= $words[++$i];
            if($i+1 >= count($words))
                break;
            $metrics = $image->queryFontMetrics($draw, $currentLine . $words[$i+1]);
        }
        //We can't add the next word to this line, so loop to the next line
        $lines[] = $currentLine;
        $i++;
        //Finally, update line height
        if($metrics['textHeight'] > $lineHeight)
            $lineHeight = $metrics['textHeight'];
    }
    return array($lines, $lineHeight);
}

function isThisChineseText($text) {
	return preg_match("/\p{Han}+/u", $text);
}


	$text1 = $_POST['overlay_text_line1'];
	$text2 = $_POST['overlay_text_line2'];

	$temp_name = 'labels/' . $_POST['file'];
	$xpos = $_POST['xpos'];
	$ypos = $_POST['ypos'];
	$xpos2 = $_POST['xpos2'];
	$ypos2 = $_POST['ypos2'];
	$fontsize = $_POST['fontsize'];
	$maxWidthAllowedForText = $_POST['maxwidth'];
	$heightPerLine = $_POST['line_height'];
	
	$chineseText = isThisChineseText($text1);
	$englishText = !$chineseText;
	
	$fontfiles = array(
		'en' => 'AmericanTypewriter.ttc',
		'zh' => 'STHeiTi.ttf'
	);
	
	
	$fontfile = $fontfiles['zh'];
	if ($englishText) {
		$fontfile = $fontfiles['en'];
		print 'english'		;
	} else {
		print 'chinese';
	}
	
	$twoLines = !empty($text1) && !empty($text2);
	$oneLine = !$twoLines;
	

	// Create a new file for the image to be written
	$new_file = 'img/overlayd_'.time().'.png';
	
	// Resizing the uploaded image
	$resized_photo = new Imagick($temp_name);
	
	// Write the image to a new file so that we can put the overlay text later
	$resized_photo->setImageFormat('png');
	$resized_photo->writeImage($new_file);
	
	// Now create the overlay text
	$overlay = new Imagick();
	$draw = new ImagickDraw();
	$pixel = new ImagickPixel( 'transparent' );
	
	// Use the same width as the image or up to you
	$overlay->newImage(260, 75, $pixel);
	
	// Set fill color
	$draw->setFillColor('#FEF94B');
	
	// set utf 8 format
	$draw->setTextEncoding('UTF-8');
	
	// Set font. Check your server for available fonts.
	$draw->setFont($fontfile);
	$draw->setFontSize( $fontsize );

	// Create the text
	list($lines1, $lineHeight) = wordWrapAnnotation($overlay, $draw, $text1, $maxWidthAllowedForText, $chineseText);
	list($lines2, $lineHeight) = wordWrapAnnotation($overlay, $draw, $text2, $maxWidthAllowedForText, $chineseText);
	
	$lines = array_merge($lines1, $lines2);

	$angle = 0; // angle at which the word is printed

	$overlay->annotateImage($draw,  $xpos, $ypos + 0*$heightPerLine, $angle, $lines[0]);	
	
	if ($twoLines) {
		$overlay->annotateImage($draw,  $xpos2, $ypos2 + 1*$heightPerLine, $angle, $lines[1]);
	}

?>