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PHP最简单的加水印方法

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Jun 23, 2016 pm 01:29 PM

<?php$img = imagecreatefromjpeg($filename);$logo = imagecreatefromjpeg($filename);/*imagecraetefromjpeg-由文件或URL创建一个新图像imagecreatefromjpeg(string $filename)如果启用了fopen包装器，URL可以作为文件名*/imagecopy($img,$logo,15,15,0,0,$width,$height);/*imagecopy($dst_im,$src_im,$dst_x,$dst_y,$src_x,$src_y,$src_w,$src_h)$dst_im是背景图像，就是需要添加水印的图片$src_im是水印图片；$dst_x,#dst_y需要把水印放到背景图片的(x,y)坐标;$src_x,$src_y是截取水印的图片的开始坐标$width，$height是截取的图片的就是水印的长度和宽度*/$url = 'http://www.stchat.cn/data/attachment/forum/201506/12/100759pidbdaydh8dy7iby.jpg';$content = file_get_contents($url);//把url写入到content这个变量里面/*file_get_contents--将整个文件读入到一个字符串*/$filename = 'tmp.jpg';file_put_contents($filename,$content);//把所有内容放到filename这个变量里面，第一个存放的是背景图片/*file_put_contents(string $filename,mixed $data)将一个字符串写入一个文件filename要被写入数据的文件名data要写入的数据，类型可以是string,array或者是stream资源*/$url = '';file_put_contents('logo.png',file_get_contents($url));//第二个是水印的图片$img = imagecreatefromjpeg($filename);$logo = imagecreatefrompng('logo.png');$size = getimagesize('logo.png');/*getimagesize()获得图像大小*/imagecopy($img,$logo,15,15,0,0,$size[0],$size[1]);header("centent-type:image/jpeg");imagejpeg(img);?>

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