PHP圖片加水印十分簡單的代碼

文字水印:

複製代碼 代碼如下:

$w = 80;

$h = 20;

$im = imagecreatetruecolor($w,$h);

$textcolor = imagecolorallocate($im, 123, 12, 255);

$white = imagecolorallocate($im, 255, 255, 255);

$grey = imagecolorallocate($im, 128, 128, 128);

$black = imagecolorallocate($im, 0, 0, 0);

imagefilledrectangle($im, 0, 0, 399, 29, $grey); //畫一矩形並填充

// 把字符串寫在圖像左上角

imagestring($im, 3, 2, 3, "Hello world!", $textcolor);

// 輸出圖像

header("Content-type: image/jpeg");

imagejpeg($im);

imagedestroy($im);

圖片水印

$groundImg = "DSC05940.jpeg";

$groundInfo = getimagesize($groundImg);

$ground_w = $groundInfo[0];

//print_r($groundInfo);

$ground_h = $groundInfo[1];

switch($groundInfo[2]){

case 1:

$ground_im = imagecreatefromgif($groundImg);

break;

case 2:

$ground_im = imagecreatefromjpeg($groundImg);

break;

case 3:

$ground_im = imagecreatefrompng($groundImg);

break;

}

$waterImg = "DSC05949.jpeg";

$imgInfo =getimagesize($waterImg);

$water_w = $imgInfo[0];

$water_w = $imgInfo[1];

switch($imgInfo[2]){

case 1:

$water_im = imagecreatefromgif($waterImg);

break;

case 2:

$water_im = imagecreatefromjpeg($waterImg);

break;

case 3:

$water_im = imagecreatefrompng($waterImg);

break;

}

imagecopy($ground_im,$water_im,100,100,0,0,500,500);

header("Content-type: image/jpeg");

imagejpeg($ground_im);

合併圖片php提供了很多函數：例如：imagecopymerge，imagecopyresized