首先需要PHP安裝gd庫,一般預設會給自動安裝,大家放心!
demo下載下傳、包含其他的一些處理圖檔的類:上傳、縮略圖、檢查是否合法等
接下來直接上demo代碼:
<?php
setWater(ROOT_PATH . '/' . $file_path,ROOT_PATH .'/data/files/mall/settings/shuiyin.png',ROOT_PATH . '/' .$watermark_file,'img',5,'','','');
/**
* 設定水印 zst
* @param $imgSrc 待處理圖檔全路徑
* @param $markImg 水印圖檔全路徑
* @param $watermark_file 處理完畢水印圖檔路徑
* @param $markType 圖檔添加水印的方式,img代表以圖檔方式,text代表以文字方式添加水印
* @param int $markPos 圖檔水印添加的位置預設為0,取值範圍:0~9 0:随機位置,在1~8之間随機選取一個位置 1:頂部居左 2:頂部居中 3:頂部居右 4:左邊居中 5:圖檔中心 6:右邊居中 7:底部居左 8:底部居中 9:底部居右
* @param $markText 給圖檔添加的水印文字
* @param $TextColor 水印文字的字型顔色
* @param $fontType 具體的字型庫,可帶相對目錄位址
*/
function setWater($imgSrc,$markImg,$watermark_file,$markType,$markPos,$markText,$TextColor,$fontType)
{
$srcInfo = @getimagesize($imgSrc);
$srcImg_w = $srcInfo[0];
$srcImg_h = $srcInfo[1];
switch ($srcInfo[2])
{
case 1:
$srcim =imagecreatefromgif($imgSrc);
break;
case 2:
$srcim =imagecreatefromjpeg($imgSrc);
break;
case 3:
$srcim =imagecreatefrompng($imgSrc);
break;
default:
die("不支援的圖檔檔案類型");
exit;
}
/*合成水印路徑為空就覆寫原圖*/
if (empty($watermark_file)){
$watermark_file = $imgSrc;
}
if(!strcmp($markType,"img"))
{
if(!file_exists($markImg) || empty($markImg))
{
return;
}
$markImgInfo = @getimagesize($markImg);
$markImg_w = $markImgInfo[0];
$markImg_h = $markImgInfo[1];
if($srcImg_w < $markImg_w || $srcImg_h < $markImg_h)
{
return;
}
switch ($markImgInfo[2])
{
case 1:
$markim =imagecreatefromgif($markImg);
break;
case 2:
$markim =imagecreatefromjpeg($markImg);
break;
case 3:
$markim =imagecreatefrompng($markImg);
break;
default:
die("不支援的水印圖檔檔案類型");
exit;
}
$logow = $markImg_w;
$logoh = $markImg_h;
}
if(!strcmp($markType,"text"))
{
$fontSize = 16;
if(!empty($markText))
{
if(!file_exists($fontType))
{
return;
}
}
else {
return;
}
$box = @imagettfbbox($fontSize, 0, $fontType,$markText);
$logow = max($box[2], $box[4]) - min($box[0], $box[6]);
$logoh = max($box[1], $box[3]) - min($box[5], $box[7]);
}
if($markPos == 0)
{
$markPos = rand(1, 9);
}
switch($markPos)
{
case 1:
$x = +5;
$y = +5;
break;
case 2:
$x = ($srcImg_w - $logow) / 2;
$y = +5;
break;
case 3:
$x = $srcImg_w - $logow - 5;
$y = +15;
break;
case 4:
$x = +5;
$y = ($srcImg_h - $logoh) / 2;
break;
case 5:
$x = ($srcImg_w - $logow) / 2;
$y = ($srcImg_h - $logoh) / 2;
break;
case 6:
$x = $srcImg_w - $logow - 5;
$y = ($srcImg_h - $logoh) / 2;
break;
case 7:
$x = +5;
$y = $srcImg_h - $logoh - 5;
break;
case 8:
$x = ($srcImg_w - $logow) / 2;
$y = $srcImg_h - $logoh - 5;
break;
case 9:
$x = $srcImg_w - $logow - 5;
$y = $srcImg_h - $logoh -5;
break;
default:
die("此位置不支援");
exit;
}
$dst_img = @imagecreatetruecolor($srcImg_w, $srcImg_h);
imagecopy ( $dst_img, $srcim, 0, 0, 0, 0, $srcImg_w, $srcImg_h);
if(!strcmp($markType,"img"))
{
imagecopy($dst_img, $markim, $x, $y, 0, 0, $logow, $logoh);
imagedestroy($markim);
}
if(!strcmp($markType,"text"))
{
$rgb = explode(',', $TextColor);
$color = imagecolorallocate($dst_img, $rgb[0], $rgb[1], $rgb[2]);
imagettftext($dst_img, $fontSize, 0, $x, $y, $color, $fontType,$markText);
}
switch ($srcInfo[2])
{
case 1:
imagegif($dst_img, $watermark_file);
break;
case 2:
imagejpeg($dst_img, $watermark_file);
break;
case 3:
imagepng($dst_img, $watermark_file);
break;
default:
die("不支援的水印圖檔檔案類型");
exit;
}
imagedestroy($dst_img);
imagedestroy($srcim);
}