这段GD库创建图像日历的代码哪里有错误？

<?php
$y=date(Y);
$m=date(n);
$w=date(w);
$d=date(j);
$ws[0]="Sun";
$ws[1]="Mon";
$ws[2]="Tue";
$ws[3]="Wed";
$ws[4]="Thu";
$ws[5]="Fri";
$ws[6]="Sat";
$image = imagecreate(80,100);
if ($w==0 || $w==6){
$colorW= imagecolorallocate($image,225,0,0);
}else{
$colorW= imagecolorallocate($image,0,0,255);
}
$colorbk = imagecolorallocate($image,0,0,120);
$colorGreen = imagecolorallocate($image,0,225,0);
$colorB = imagecolorallocate($image,255,255,255);
$colorBlack= imagecolorallocate($image,0,0,0);
imagefill($image,0,0,$colorbk);
imagefilledrectangle($image,10,10,70,90,$colorB);
imagestring($image,5,23,15,$y,$colorBlack);
imagestring($image,5,36,35,$m,$colorGreen);   //这里是26行
imagestring($image,5,32,55,$d,$colorW);
imagestring($image,4,30,75,$ws[$w],$colorW);
header("Content-type: image/gif");
imagegif($image);
?>

Parse error:  syntax error, unexpected T_STRING in D:\wamp\www\exp\Calendar\3.php on line 26