php给图片添加文字水印或图片水印-封装的方法

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, $fontType,$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);

}