php图片处理类（生成缩略图,增加水印，获取图片信息)

php教程图片处理类（生成缩略图,增加水印，获取图片信息)
本文章提供这款图片处理类，他可以做的事情有把图片生成缩略图,可能给图片增加水印以及获取图片信息，算是比较实用代码又简洁的函数*/

class image {  public $info=array();  function __construct()  {   !extension_loaded('gd') && exit("www.bKjia.c0m提示：服务器环境不支持gd库");   return true;  }  function image()  {   $this->__construct();  }    function thumb($image,$thumb_width=300,$thumb_height=225)  {   $info=$this->info($image);   $scale=min(1,min($thumb_width/$info['width'],$thumb_height/$info['height'])); //按比例缩放   $thumb_width=intval($info['width']*$scale);   $thumb_height=intval($info['height']*$scale);   $createfunc='imagecreatefrom'.($info['type']=='jpg'?'jpeg':$info['type']);   $im=$createfunc($image);   $thumb_im=$info['type']!='gif' && function_exists('imagecreatetruecolor')?imagecreatetruecolor($thumb_width,$thumb_height):imagecreate($thumb_width,$thumb_height);   imagecopyresampled($thumb_im,$im,0,0,0,0,$thumb_width,$thumb_height,$info['width'],$info['height']);   if($info['type']=='gif' || $info['type']=='png')   {    $bgcolor=imagecolorallocate($thumb_im,0,255,0);    imagecolortransparent($thumb_im,$bgcolor);   }   $imagefunc='image'.($info['type']=='jpg'?'jpeg':$info['type']);   $thumbname='thumb_'.$info['name'].'.'.$info['type'];   $imagefunc($thumb_im,$info['path'].$thumbname);   imagedestroy($im);   imagedestroy($thumb_im);   return $info['path'].$thumbname;    }  function watermark($image,$pos=9,$watermarkimg='images/watermark.gif',$pct=65,$text='',$w_font=5,$w_color='#ff0000')  {   $imageinfo=$this->info($image);   $source_w=$imageinfo['width'];   $source_h=$imageinfo['height'];   $imagecreatefunc='imagecreatefrom'.($imageinfo['type']=='jpg'?'jpeg':$imageinfo['type']);   $im=$imagecreatefunc($image);   if(!empty($watermarkimg) && file_exists($watermarkimg)) //添加图片水印   {    $iswaterimage=true;    $watermarkinfo=$this->info($watermarkimg);    $width=$watermarkinfo['width'];    $height=$watermarkinfo['height'];    $watermarkcreatefunc='imagecreatefrom'.($watermarkinfo['type']=='jpg'?'jpeg':$watermarkinfo['type']);    $watermark_im=$watermarkcreatefunc($watermarkimg);   }   else //添加文字水印   {    $iswaterimage=false;    if(!empty($w_color) && strlen($w_color)==7)    {     $r=hexdec(substr($w_color,1,2));     $g=hexdec(substr($w_color,3,2));     $b=hexdec(substr($w_color,5,2));    }    $temp = imagettfbbox(ceil($w_font*2.5), 0, 'fonts/alger.ttf', $text);    $width = $temp[2] - $temp[6];    $height = $temp[3] - $temp[7];    unset($temp);   }   switch($pos)   {    case 0:     $wx = mt_rand(0,($source_w - $width));     $wy = mt_rand(0,($source_h - $height));     break;    case 1:     $wx = 5;     $wy = 5;     break;    case 2:     $wx = ($source_w - $width) / 2;     $wy = 5;     break;    case 3:     $wx = $source_w - $width-5;     $wy = 5;     break;    case 4:     $wx = 5;     $wy = ($source_h - $height) / 2;     break;    case 5:     $wx = ($source_w - $width) / 2;     $wy = ($source_h - $height) / 2;     break;    case 6:     $wx = $source_w - $width-5;     $wy = ($source_h - $height) / 2;     break;    case 7:     $wx = 5;     $wy = $source_h - $height-5;     break;    case 8:     $wx = ($source_w - $width) / 2;     $wy = $source_h - $height-5;     break;    default:     $wx = $source_w - $width-5;     $wy = $source_h - $height-5;     break;   }   if($iswaterimage)   {    if($imageinfo['type'] == 'png') {     imagecopy($im, $watermark_im, $wx, $wy, 0, 0, $width, $height);    } else {     imagecopymerge($im, $watermark_im, $wx, $wy, 0, 0, $width, $height, $pct);    }   }   else   {    imagestring($im,$w_font,$wx,$wy,$text,imagecolorallocate($im,$r,$g,$b));   }   $imagefunc='image'.($imageinfo['type']=='jpg'?'jpeg':$imageinfo['type']);   $imagefunc($im,$image);   imagedestroy($im);   return true;  }  function info($image)  {   $info=array();   $info['size']=filesize($image);   $imageinfo=getimagesize($image);   $info['width']=$imageinfo[0];   $info['height']=$imageinfo[1];   $info['width_height']=$imageinfo[3];   $info['mime']=$imageinfo['mime'];   unset($imageinfo);   $imageinfo=pathinfo($image);   $info['path']=$imageinfo['dirname'].'/';   $info['type']=strtolower($imageinfo['extension']); //图片类型，不含'.'   $info['name']=$imageinfo['filename'];   unset($imageinfo,$name);   $this->info=$info;   return $info;  } }

v7.0.0603UsualToolCMS大众版

UsualToolCMS 是一款企业级的网站内容管理系统，由PHP+MYSQL编写，使用模板分离技术，支持创建多种类型的站点。 拥有UsualToolCMS便能快速同时在手机端与电脑端建立网站，通过UsualToolCMS能快速接入公众号，快速生成一个微信小程序及WEBAPP，真正的多站合一。互联网技术变得更简单。 升级说明： UsualToolCMS7.0.0604增加文字/图片自动水印系

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