php读取中文图片文件读不了，编码有关问题

<?php

$image='小图.jpg';
$percent=0.05;
$im=getimagesize($image);
$width=$im[0];
$hight=$im[1];
switch ($im[2]) {
    case 1:
        $im=@imagecreatefromgif($image);
        break;
    case 2:
        $im=@imagecreatefromjpeg($image);
        break;
    case 3:
        $im=@imagecreatefrompng($image);
        break;
}

$logo='1.jpg';
$im1=getimagesize($logo);
//print_r($im1);
switch ($im1[2]) {
    case 1:
        $im1=@imagecreatefromgif($logo);
        break;
    case 2:
        $im1=@imagecreatefromjpeg($logo);
        break;
    case 3:
        $im1=@imagecreatefrompng($logo);
        break;
}
imagecopy($im,    $im1,   700,-100,0,0,'440','771');
//       底下图     上面图        
$te=imagecolorallocate($im,255,255,255);

imagettftext($im,12,0,20,20,$te,'../simhei.ttf','新年快乐');
$newwidth=$width*$percent;
$newheight=$hight*$percent;
$new=imagecreatetruecolor($newwidth,$newheight);
imagecopyresized($new,$im,0,0,0,0,$newwidth,$newheight,$width,$hight);

header("Content-type: image/jpeg");
imagejpeg($new);//编译图片
//if(imagejpeg($im,'new.jpg')){
//    echo "水印成功";
//}
//imagejpeg($new,'小图.jpg');
//imagejpeg($im,'大图.jpg');
?>