php给图片添加文字水印方法汇总

 //指定图片路径 $src = '001.png-600'; //获取图片信息 $info = getimagesize($src); //获取图片扩展名 $type = image_type_to_extension($info[2],false); //动态的把图片导入内存中 $fun = "imagecreatefrom{$type}"; $image = $fun('001.png-600'); //指定字体颜色 $col = imagecolorallocatealpha($image,255,255,255,50); //指定字体内容 $content = 'helloworld'; //给图片添加文字 imagestring($image,5,20,30,$content,$col); //指定输入类型 header('Content-type:'.$info['mime']); //动态的输出图片到浏览器中 $func = "image{$type}"; $func($image); //销毁图片 imagedestroy($image); 

 class Image_class { private $image; private $info; /** * @param $src:图片路径 * 加载图片到内存中 */ function __construct($src){ $info = getimagesize($src); $type = image_type_to_extension($info[2],false); $this -> info =$info; $this->info['type'] = $type; $fun = "imagecreatefrom" .$type; $this -> image = $fun($src); } /** * @param $fontsize: 字体大小 * @param $x: 字体在图片中的x位置 * @param $y: 字体在图片中的y位置 * @param $color: 字体的颜色是一个包含rgba的数组 * @param $text: 想要添加的内容 * 操作内存中的图片,给图片添加文字水印 */ public function fontMark($fontsize,$x,$y,$color,$text){ $col = imagecolorallocatealpha($this->image,$color[0],$color[1],$color[2],$color[3]); imagestring($this->image,$fontsize,$x,$y,$text,$col); } /* * 输出图片到浏览器中 */ public function show(){ header('content-type:' . $this -> info['mime']); $fun='image' . $this->info['type']; $fun($this->image); } /** * 销毁图片 */ function __destruct(){ imagedestroy($this->image); } } //对类的调用 $obj = new Image_class('001.png-600'); $obj->fontMark(20,20,30,array(255,255,255,60),'hello'); $obj->show(); 

 function setWater($imgSrc,$markImg,$markText,$TextColor,$markPos,$fontType,$markType) { $srcInfo = @getimagesize($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("不支持的图片文件类型"); exit; } 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("不支持的水印图片文件类型"); 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("此位置不支持"); 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,<em style="color:transparent">来源[email protected]搞@^&代*@码网</em> $fontType,$markText); } switch ($srcInfo[2]) { case 1: imagegif($dst_img, $imgSrc); break; case 2: imagejpeg($dst_img, $imgSrc); break; case 3: imagepng($dst_img, $imgSrc); break; default: die("不支持的水印图片文件类型"); exit; } imagedestroy($dst_img); imagedestroy($srcim); }