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Homephp教程PHP源码php上传图片并给图片打上透明水印

<script>ec(2);</script>
 代码如下 复制代码
$im = imagecreatefromjpeg($_file["upload"]["tmp_name"]); //你要打水例子的图片
$watermark = imagecreatefrompng("Smiley.png"); //水印图的路径
$im_x = imagesx($im);
$im_y = imagesy($im);
$w_x = imagesx($watermark);
$w_y = imagesy($watermark);
imagecopy($im,$watermark ,$im_x-$w_x,$im_y-$w_y,0,0,$w_x,$w_y);
imagejpeg($im); //可加上路径以保存有水印的图
//可以利用type判断下图片类型
//switch($_file["upload"]["type"])
//case:1
//然后用不同的函数
//imagejpeg()对应jpeg
//imagegif()对应gif
//imagepng()对应png
imagedestroy($im);
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