php 图像和水印
生成图像
$img = imagecreate(400,400); imagecolorallocate($img,255,255,255); imageellipse($img,200,200,50,50,imagecolorallocate($img,255,0,0)); header('Content-type:image/png'); // mime type 对应表 imagepng($img);
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水印
$img = imagecreatefromjpeg('lydh.jpg'); imagestring($img,5,5,5,'mysterious',imagecolorallocate($img,255,255,0)); header('Content-type:image/png'); imagejpeg($img);