PHP平鋪水印

$bigimgpath = "logo.png"; //原圖

$logo = "logo2.png"; //水印
$im = imagecreatefromstring(file_get_contents($bigimgpath));
//獲取水印源
$watermark = imagecreatefromstring(file_get_contents($logo));
//獲取圖、水印 寬高型別
list($bgwidth, $bghight, $bgtype) = getimagesize($bigimgpath);
list($logowidth, $logohight, $logotype) = getimagesize($logo);
//定義平鋪資料
$x_length = $bgwidth - 10; //x軸總長度
$y_length = $bghight - 10; //y軸總長度
//建立透明畫布 偽白色
$opacity=20;
$w = imagesx($watermark);
$h = imagesy($watermark);
$cut = imagecreatetruecolor($w,$h);
$white = imagecolorallocatealpha($cut, 255,255,255,0);
imagefill( $cut, 0, 0, $white );
//整合水印
imagecopy($cut, $watermark, 0, 0, 0, 0, $w, $h);
//迴圈平鋪水印
for ($x = 0; $x < $x_length; $x) 
$x += $logowidth;
}header("content-type:image/png");
imagejpeg($im);
die;

示例效果圖

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