php--图片加水印

<?php
//加载图片
$image = imagecreatefromjpeg("upload/cat.jpg");
//加载水印，png格式
$watermark = imagecreatefrompng("upload/xing.png");
//水印宽度和高度
$width = imagesx($watermark);
$height = imagesy($watermark);
//复制图像至
imagecopyresampled($image,$watermark,0,0,0,0,$width,$height,$width,$height);
//生成图片
imagejpeg($image,"upload/cat_water.jpg",100);
//销毁句柄
imagedestroy($image);
?>

<span>shi yong php gei tu pian jia shui yin</span>
<hr>
<table>
    <tr>
        <td>yuan tu:</td>
        <td>jia shui yin hou de tu:</td>
    </tr>
    <tr>
        <td><img src="upload/cat.jpg"></td>
        <td><img src="upload/cat_water.jpg"></td>
    </tr>
</table>