phpgd类,phpGD库类

/**

* GD库类

* 功能&＃xff1a;水印 缩略图 验证码*/

classImageTool{protected static $erroTxt;/**

* getImgInfo

* 获取图片信息

* param filename

* return Array/False*/

protected static function getImgInfo($filename){if (!file_exists($filename)) {#code...

ImageTool::$erroTxt &＃61; $filename.‘图片不存在‘;return false;

}$imgInfo &＃61; getimagesize($filename);if(!$imgInfo){

ImageTool::$erroTxt &＃61; $filename.‘未知图片类型‘;return false;

}$info[‘width‘] &＃61; $imgInfo[0];$info[‘height‘] &＃61; $imgInfo[1];$info[‘ext‘] &＃61; strtolower( str_replace(‘/‘, ‘‘, strrchr($imgInfo[‘mime‘],‘/‘)) );return $info;

}/**

* water()

* 功能&＃xff1a;图片加水印

* param : $dst_img 目标图片

* $water_img 水印图片

* $save 目标函数保存路径

* $pos 水印位置 上右下左 0 1 2 3 默认为2右下角

* $alpha透明度

* return*/

public static function water($dst_img,$water_img,$save&＃61;‘‘,$pos&＃61;‘2‘,$alpha&＃61;‘50‘){$dst_info &＃61; ImageTool::getImgInfo($dst_img);$water_info &＃61; ImageTool::getImgInfo($water_img);if(!$dst_info || !$water_info){return false;

}//判断水印图片是否大于目标图片

if ($dst_info[‘width‘]<&＃61;$water_info[‘width‘] || $dst_info[‘height‘]<&＃61;$water_info[‘height‘]) {#code...

ImageTool::$erroTxt&＃61;‘水印图片大于待操作图片‘;return false;

}//生产对应画布函数

$createDstFun &＃61; ‘imagecreatefrom‘.$dst_info[‘ext‘];$createWaterFun &＃61; ‘imagecreatefrom‘.$water_info[‘ext‘];//return $createWaterFun;

if (!function_exists($createDstFun)) {#code...

ImageTool::$erroTxt&＃61;$createDstFun.‘函数异常‘;return false;

}if (!function_exists($createWaterFun)) {#code...

ImageTool::$erroTxt&＃61;$createWaterFun.‘函数异常‘;return false;

}//创建画布

// ob_clean();

$dst_im &＃61; $createDstFun($dst_img);$water_im &＃61; $createWaterFun($water_img);//画布函数操作

$src_x &＃61; 0;$src_y &＃61; 0;$src_w &＃61; $water_info[‘width‘];$src_h &＃61; $water_info[‘height‘];switch ($pos) {case ‘0‘:

#code...左上角

$dst_x &＃61; 0;$dst_y &＃61; 0;break;case ‘1‘:

#code...右上角

$dst_x &＃61; $dst_info[‘width‘]-$water_info[‘width‘];$dst_y &＃61; 0;break;case ‘3‘:

#code...左下角

$dst_x &＃61; 0;$dst_y &＃61; $dst_info[‘height‘]-$water_info[‘height‘];break;default:

#code...右下角

$dst_x &＃61; $dst_info[‘width‘]-$water_info[‘width‘];$dst_y &＃61; $dst_info[‘height‘]-$water_info[‘height‘];break;

}//return $pos;

$rs &＃61; imagecopymerge ( $dst_im , $water_im , $dst_x , $dst_y , $src_x , $src_y , $src_w , $src_h , $alpha);if( !$rs){

ImageTool::$erroTxt&＃61;‘水印添加失败‘;return false;

}$imgInputFun&＃61;‘image‘.$dst_info[‘ext‘];if(!$save){$save &＃61; $dst_img;unlink($dst_img);

}$imgInputFun($dst_im,$save);

imagedestroy($dst_im);

imagedestroy($water_im);return true;

}/**

* thumb()

* 缩略图

* param :

* $src_img 原图片路径

* $thumb_w,$thumb_h 缩略图宽高

* $save 缩略图保存路径*/

public static function thumb($src_img,$thumb_w&＃61;‘200‘,$thumb_h&＃61;‘200‘,$save&＃61;‘‘){$thumbInfo &＃61; ImageTool::getImgInfo($src_img);if(!$thumbInfo){return false;

}//创建画布

$dst_im &＃61; imagecreatetruecolor($thumb_w,$thumb_h);//缩略图函数

$thumbFun &＃61; ‘imagecreatefrom‘.$thumbInfo[‘ext‘];$thumb_im &＃61; $thumbFun($src_img);//缩略图比例

$percent &＃61; min( $thumb_w/$thumbInfo[‘width‘],$thumb_h/$thumbInfo[‘height‘] ); //小数

$bg &＃61; imagecolorallocate($dst_im, 255, 255, 255);

imagefill($dst_im, 0, 0, $bg); //填充背景为白色

$dst_image &＃61; $dst_im;$src_image &＃61; $thumb_im;$src_x &＃61; 0;$src_y &＃61; 0;$dst_w &＃61; $thumbInfo[‘width‘]*$percent; //图片粘贴到缩略图的宽

$dst_h &＃61; $thumbInfo[‘height‘]*$percent; //图片粘贴到缩略图的高

$src_w &＃61; $thumbInfo[‘width‘];$src_h &＃61; $thumbInfo[‘height‘];$dst_x &＃61; ($thumb_w - $dst_w)/2;$dst_y &＃61; ($thumb_w - $dst_h)/2;$rs &＃61; imagecopyresampled($dst_image, $src_image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h);if(!$rs){

ImageTool::$erroTxt&＃61;‘生成缩略图失败‘;return false;

}$imgInputFun&＃61;‘image‘.$thumbInfo[‘ext‘];if(!$save){//$path &＃61; str_replace(‘D:/WWW/study/food/‘, ‘../‘, dirname($src_img)).‘/thumb_‘.basename($src_img);

$path &＃61; dirname($src_img).‘/thumb_‘.basename($src_img);

}else{//$path &＃61; str_replace(‘D:/WWW/study/food/‘, ‘../‘, dirname($src_img)).‘/‘.$save.‘_‘.basename($src_img);

$path &＃61; dirname($src_img).‘/‘.$save.‘_‘.basename($src_img);

}$save &＃61; $path;$imgInputFun($dst_im,$save);

imagedestroy($dst_im);return $path;

}/**

* captcha

* 生成验证码

* param : $width 验证码宽 $heigth 验证码高

* $lineNum 线条干扰码数目

* $alpha 线条干扰码透明度

* $length 验证码字符长度

* return String*/

public static function captchat($width&＃61;‘70‘,$height&＃61;‘25‘,$lineNum&＃61;‘10‘,$length&＃61;‘4‘,$alpha&＃61;‘80‘){$capt_im &＃61; imagecreatetruecolor($width, $height);$bak_im &＃61; imagecreatetruecolor($width, $height);$bg &＃61; imagecolorallocate($capt_im, 100, 100, 100);$color &＃61; imagecolorallocate($capt_im, rand(0,255), rand(0,255), rand(0,255));

imagefill($capt_im, 0, 0, $bg);

imagefill($bak_im, 0, 0, $bg);//干扰线

for($i&＃61;0;$i

imageline($capt_im, rand(0,$width), rand(0,$height), rand(0,$width), rand(0,$height), $lincolor);

}//干扰点

for($i&＃61;0;$i<200;$i&＃43;&＃43;){$dotcolor &＃61; imagecolorallocatealpha($capt_im, rand(0,255), rand(0,255), rand(0,255),$alpha);

imagesetpixel($capt_im,rand(0,$width), rand(0,$height), $dotcolor);

}$size &＃61;18;$angle &＃61; 0;$x &＃61; 2;$y &＃61; 22;$fontfile &＃61; ‘verdana.ttf‘;$text &＃61; ImageTool::randName($length);

imagettftext($capt_im, $size, $angle, $x, $y, $color, $fontfile, $text);//验证码扭曲

$range &＃61; 4; //扭曲程度

// imagecopyresampled($dst_image, $src_image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h)

for($i&＃61;0;$i

imagecopyresampled($bak_im, $capt_im, $i, $y, $i, 0, $i, $height, $i, $height);

}header("Content-type:image/png");

imagepng($bak_im);

imagedestroy($capt_im);

imagedestroy($bak_im);return true;

}/**

* 生成随机字符

* arg $n

* return string*/

protected static function randName($n&＃61;6){ //$n 代表截取长度

$str &＃61; ‘abcdefghijkmnpqrstuvwxyzABCDEFGHIJKMNPQRSTUVWXYZ0123456789‘;$str &＃61; str_shuffle($str); //随机打乱一个字符串

$str &＃61; substr($str,0,$n); //截取子字符串

return $str;

}/**

* getError()

* 获取错误信息

* param String

* return String*/

public static functiongetError(){return ImageTool::$erroTxt;

}

}//ImageTool::captchat();

?>