前端时间因为工作需要，书写了一个支持gif动画的水印类，类为php代码，忘好心的朋友可以转播分享，但是不要忘记附上版权，来自大连新图闻科技

以下为类的代码片段，我在截取了类中的一小段函数没显示，因为要保证完整的版权，有需要的朋友可以加我工作QQ索取：499375381

<?php
/**
* 水印类，支持GIF动画  需要  MagickWandForPHP 扩展
* 作者：张虹亮 icyzhl#yeah.net
* $imagefile 源图片路径
* $string 水印文字
* $options array类型，水印的样式设置
  data array
  str(string) 水印文字(需要UTF8格式)
  size:文字大小
  position:
  int,int 数字确定准确位置

  color:字体颜色 只能用网页16进制模式表示 (如：#ff0000)或者：auto,根据背景颜色自动调整文字颜色(gif动画无效）
  blod:是否粗体（true or false 目前不可用)
  water_file(string) 水印图片文件
  font (string) 字体文件
  gif(bool) true 支持GIF动画，否则不支持
  format(string) 输出图片的格式，只能是 jpeg gif 和 png 中的一个
  
**/开始定义支持gif动画水印的类名称
class watermark {
  //设置构造函数
  function watermark($imagefile,$options) {
  $this->wnd = NewMagickWand();
  $this->imagefile = $imagefile;
  if(!MagickReadImage( $this->wnd, $imagefile )) $this->error("kill","source image not finded");
  $this->width  = MagickGetImageWidth($this->wnd);
  $this->height  = MagickGetImageHeight($this->wnd);
  $this->mime  = MagickGetImageMimeType($this->wnd);
  $this->options  = $options;  
  $this->image_number =  MagickGetNumberImages($this->wnd);
  }
  
/**
*
* 设置gif动画水印是文字还是图片，当然了，我这里不光光支持gif动画，也支持文字，在类函数调用的时候说明即可
*
***/

  function set_water_mode() {
  foreach($this->options['data'] as $key=>$option) {  
  if(!empty($option['str'])) {
  $str = trim($option['str']);
  if(!empty($str)) {
  $this->data[$key]['water_file'] = false;  
  $this->data[$key]['water_mode'] = 'font';  
  if($option['direction']) {
  $this->data[$key]['str_arr'] = $this->str_nl($option['str']);
  }  
  $this->data[$key]['str'] = $option['str'];
  } else {
  $this->data[$key]['str'] = false;
  }
  } else {
  $this->data[$key]['str'] = false;
  }
  
  if($this->data[$key]['str']=== false) {
  if(!empty($option['water_file'])) {
  $this->data[$key]['water_file'] = $option['water_file'];
  $this->data[$key]['water_mode'] = 'file';
  } else {
  $this->data[$key]['water_file'] = false;
  }
  }
  
  if($this->data[$key]['str'] === false && $this->data[$key]['water_file'] === false ) $this->error("kill","water set error no fonts and no file");
  else {
  $this->dwand[$key] = NewDrawingWand();
  if($this->data[$key]['water_mode']=='font') {
  if(!is_object($this->pwand[$key])) {$this->pwand[$key] = NewPixelWand();}
  
  }else {
  if(!is_object($this->water_wnd[$key])) $this->water_wnd[$key] = NewMagickWand();
  if(!MagickReadImage( $this->water_wnd[$key], $this->data[$key]['water_file'] )) $this->error("kill","water image not finded");
  }
  }
  }
  
  }

/**
*
* 设置水印字体样式
*
**/  
  function set_style() {
  foreach($this->options['data'] as $key=>$option) {  

  if($this->data[$key]['water_mode']=='font') {
  if($option['color']) {
  if(!is_object($this->pwand[$key])) {$this->pwand[$key] = NewPixelWand();}
  PixelSetColor($this->pwand[$key], $option['color']);
  }
  
  if($option['angle']) {
  $this->data[$key]['angle'] = $option['angle'];
  } else $this->data[$key]['angle'] = 0;
  if(file_exists($option['font'])) DrawSetFont($this->dwand[$key], $option['font']);
  if($option['blod']) DrawSetFontWeight($this->dwand[$key],600);
  DrawSetFontSize($this->dwand[$key], $option['size']?$option['size']:12);
  DrawSetFillColor($this->dwand[$key], $this->pwand[$key]);
  }
  
  }
  }

/**
*
* 设置gif图片水印的位置
*
***/  
  function set_position() {
  foreach($this->options['data'] as $key=>$option) {  
  
  //获取水印的高度和宽度
  if($this->data[$key]['water_mode']=='font') {
  //$this->water_height = MagickGetStringHeight($this->wnd,$this->dwand,$this->str);
  $this->data[$key]['water_height'] = $option['size'];
  if(empty($this->data[$key]['water_height'])) $this->data[$key]['water_height'] = MagickGetStringHeight($this->wnd,$this->dwand[$key],$this->data[$key]['str']);
  $this->data[$key]['water_width']  = MagickGetStringWidth($this->wnd,$this->dwand[$key],$this->data[$key]['str']);
  } elseif($this->water_mode=='file') {
  $this->data[$key]['water_height'] = MagickGetImageHeight($this->water_wnd[$key]);
  $this->data[$key]['water_width']  = MagickGetImageWidth($this->water_wnd[$key]);
  }
  //边距
  
  list($x,$y) = explode(',',$option['position']);
  if(is_numeric($x) && is_numeric($y)) {
  $this->data[$key]['left'] = $x;
  $this->data[$key]['top'] = $y;
  } else {
  $this->data[$key]['left'] = 0;
  $this->data[$key]['top'] = 0;
  }
  if(!$option['direction']) $this->data[$key]['top'] += $this->data[$key]['water_height'];
  }
  
  }
  
/**
*
* 写gif动画水印到图片上
*
***/
  function write() {
  $this->set_water_mode();//确定是使用文字还是图片水印
  $this->set_style();//如果是文字设置文字的样式
  $this->set_position(); //确定水印的位置
  $this->set_format();
  MagickSetWandSize($this->wnd,$this->width,$this->height);
  MagickSetFormat( $this->wnd, $this->format);
  $this->wnd = MagickCoalesceImages($this->wnd);
  
  foreach($this->options['data'] as $key=>$option) {  
  
  //$this->dwand[$key] = NewDrawingWand();
  if($this->data[$key]['water_mode'] == 'font') {

  MagickSetImageIndex($this->wnd,0);

  $this->annotation($key);
  
  if($this->options['gif']) {
  while(MagickNextImage($this->wnd)) {
  $this->annotation($key);
  }
  }
  } elseif ($this->data[$key]['water_mode'] == 'file') {
  if($this->options['gif']) {
  $this->wnd = MagickCoalesceImages($this->wnd);
  MagickSetImageIndex($this->wnd,0);
  MagickCompositeImage($this->wnd ,$this->water_wnd[$key]  ,MW_AtopCompositeOp,$this->data[$key]['left'],$this->data[$key]['top']);
  while(MagickNextImage($this->wnd)) {
  MagickCompositeImage($this->wnd ,$this->water_wnd[$key]  ,MW_AtopCompositeOp,$this->data[$key]['left'],$this->data[$key]['top']);
  }
  } else MagickCompositeImage($this->wnd ,$this->water_wnd[$key]  ,MW_AtopCompositeOp,$this->data[$key]['left'],$this->data[$key]['top']);
  
  }
  }
  $this->is_write = true;
  }
  
/**
*
*输出图片
*
***/  
  function putout($filenam='') {
  if(!$this->is_write) $this->write();
  header( "Content-Type: image/{$this->format}" );
  if($this->options['gif'])  MagickEchoImagesBlob( $this->wnd );
  else MagickEchoImageBlob( $this->wnd );
  }
  
  function error($error_flag,$info){
  if($error_flag == 'kill') die("$info");
  }

/**
*
* 设置输出图片格式gif
*
**/
  function set_format() {
  $format_list = array('gif','jpeg','png');
  if($this->options['gif'] && $this->image_number>1) {
  $this->format = 'gif';
  return;
  }
  if(in_array($this->options['format'],$format_list)) $this->format = $this->options['format'];
  else {
  if($this->mime) {
  foreach ($format_list as $v) {
  //echo $this->format.$v.'|'.$this->mime;
  if(strpos($this->mime,$v)!==false) {$this->format = $v; break;}
  }
  } else $this->format = 'jpeg';
  
  }
  if(empty($this->format)) $this->format = 'jpeg';
  }
  
  function str_nl($str) {
  
  $strlen =  mb_strlen($str,"UTF-8");
  
  for($i=0;$i<$strlen;$i++) {
  $v = mb_substr($str,$i,1,"UTF-8");
  if(!preg_match("/^[a-zA-Z0-9]+$/",$v) && $v!=' ') $word .= " ".$v." ";
  else $word .= $v;
  }
  
  $reword = str_replace("  "," ",$word);
  while($word != $reword){
  $word = $reword;
  $reword = str_replace("  "," ",$word);
  }
  
  $words =  explode(" ",$word);
  foreach($words as $k=>$v) {
  $v = trim($v);
  if(empty($v)) unset($words[$k]);
  }
  return $words;
  }
  //这里省略了一个函数，也是该类的重要函数之一
}
?>

再次说明：以上类文件中我减少了一个函数，如果有需要请联系我本人索取完整类的内容，支持gif动画的类水印就写到这里