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PHP判断来源显示图片水印

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2016-06-21 08:50:171438browse

 

// # 配置文件 php100.com

 

$floder = ''; #图片保存文件夹 

 

$waterpic = 'win.png'; #水印图片地址 

 

$referer = 'kalvin'; #来源页包含字符串 

 

// # 配置文件 

 

header("Content-type: image/png"); # 设置输出文件头 

 

$filename = $floder . $_GET["filename"]; # 设置源文件地址 

 

$sourceImg = imagecreatefromjpeg($filename); # 读取源图像 

 

$waterImg = imagecreatefrompng($waterpic); # 读取水印标志 

 

$bg_color = imagecolorat($waterImg, 1, 1); # 取出标志中需要设为透明的颜色 

 

imagecolortransparent($waterImg, $bg_color); # 设置标志中需要透明的颜色 

 

$sourceX = imagesx($sourceImg); # 取得源图像宽度 

 

$sourceY = imagesy($sourceImg); # 取得源图像高度 

 

$waterX = imagesx($waterImg); # 取得标志像宽度 

 

$waterY = imagesy($waterImg); # 取得标志像高度 

 

$x = ($sourceX - $waterX) / 2; 

$y = ($sourceY - $waterY) / 2; #计算中心位置 

 

if (isset($_SERVER['HTTP_REFERER']) && strpos($_SERVER['HTTP_REFERER'], $referer) == false) 

    imagecopymerge($sourceImg, $waterImg, $x, $y, 0, 0, $waterX, $waterY, 80); #合并图像 合并度设置为50 .100为完全合并.相当于把第二个参数里的图像透明到原来的50/100然后贴到第一个参数的图像里 

 

imagepng($sourceImg); #输出图像 php100.com

 

?> 



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