php使用Imagick生成图片的方法

public function getPic(){
  header(Content-Type: text/html; charset=utf-8);
  $text = 中粮屯河（sh600737）;//中粮屯河（sh600737）
  $watermark = 305988103123zczcxzas;
  $len = strlen($text);
  $width = 10.5*(($len-8)/3*2+8);
  $height = 26;
  $imagick = new Imagick();
  $color_transparent = new ImagickPixel(#ffffff); //transparent 透明色
  $imagick->newImage($width, $height, $color_transparent, jpg);
  //$imagick->borderimage(#000000, 1, 1);
  $style[font_size] = 12;
  $style[fill_color] = #000000;
  for($num= strlen($watermark); $num>=0; $num--){
   $this->add_text($imagick,substr($watermark, $num,1), 2+($num*8), 30, 1,$style);
   $this->add_text($imagick,substr($watermark, $num,1), 2+($num*8), 5, 1,$style);
  }
  //return;
  $style[font_size] = 20;
  $style[fill_color] = #FF0000;
  $style[font] = ./msyh.ttf; ///微软雅黑字体 解决中文乱码
  //$text=mb_convert_encoding($text,UTF-8); //iconv("GBK","UTF-8//IGNORE",$text);
  $this->add_text($imagick,$text, 2, 20, 0,$style);
  header ( Content-type:  . strtolower ($imagick->getImageFormat ()) );
  echo $imagick->getImagesBlob ();
}
// 添加水印文字
public function add_text(& $imagick, $text, $x = 0, $y = 0, $angle = 0, $style = array()) {
  $draw = new ImagickDraw ();
  if (isset ( $style [font] ))
   $draw->setFont ( $style [font] );
  if (isset ( $style [font_size] ))
   $draw->setFontSize ( $style [font_size] );
  if (isset ( $style [fill_color] ))
   $draw->setFillColor ( $style [fill_color] );
  if (isset ( $style [under_color] ))
   $draw->setTextUnderColor ( $style [under_color] );
  if (isset ( $style [font_family] ))
   $draw->setfontfamily( $style [font_family] );
  if (isset ( $style [font] ))
   $draw->setfont($style [font] );
  $draw->settextencoding(UTF-8);
  if (strtolower ($imagick->getImageFormat ()) == gif) {
   foreach ( $imagick as $frame ) {
    $frame->annotateImage ( $draw, $x, $y, $angle, $text );
   }
  } else {
   $imagick->annotateImage ( $draw, $x, $y, $angle, $text );
  }
}