PHP生成水印

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　　文本水印
　　我们使用函数watermark_text()来生成文本水印，你必须先指定字体源文件、字体大小和字体文本，具体代码如下：
　　

• $font_path = "GILSANUB.TTF"; // Font file
  
• $font_size = 30; // in pixcels
  
• $water_mark_text_2 = "phpfuns"; // Watermark Text
  
• function watermark_text($oldimage_name, $new_image_name)
  
• {
  
• global $font_path, $font_size, $water_mark_text_2;
  
• list($owidth,$oheight) = getimagesize($oldimage_name);
  
• $width = $height = 300;
  
• $image = imagecreatetruecolor($width, $height);
  
• $image_src = imagecreatefromjpeg($oldimage_name);
  
• imagecopyresampled($image, $image_src, 0, 0, 0, 0, $width, $height, $owidth, $oheight);
  
• $blue = imagecolorallocate($image, 79, 166, 185);
  
• imagettftext($image, $font_size, 0, 68, 190, $blue, $font_path, $water_mark_text_2);
  
• imagejpeg($image, $new_image_name, 100);
  
• imagedestroy($image);
  
• unlink($oldimage_name);
  
• return true;
  
• }
  

　　

　　图片水印
　　我们使用函数watermark_image()来生成图片水印，你必须先水银图片的源文件。具体代码如下：
　　

• $image_path = "phpfuns.png";
  
• function watermark_image($oldimage_name, $new_image_name)
  
• /{
  
• global $image_path;
  
• list($owidth,$oheight) = getimagesize($oldimage_name);
  
• $width = $height = 300;
  
• $im = imagecreatetruecolor($width, $height);
  
• $img_src = imagecreatefromjpeg($oldimage_name);
  
• imagecopyresampled($im, $img_src, 0, 0, 0, 0, $width, $height, $owidth, $oheight);
  
• $watermark = imagecreatefrompng($image_path);
  
• list($w_width, $w_height) = getimagesize($image_path);
  
• $pos_x = $width - $w_width;
  
• $pos_y = $height - $w_height;
  
• imagecopy($im, $watermark, $pos_x, $pos_y, 0, 0, $w_width, $w_height);
  
• imagejpeg($im, $new_image_name, 100);
  
• imagedestroy($im);
  
• unlink($oldimage_name);
  
• return true;
  
• }
  

　　

　　上传图片表单
　　我们使用下面的表单来上传图片：
　　

• 
  
• // HTML Code
  
• 
  
• Upload Image
  
• Image :
  
• 
  
• 
  
•