<?php #封装一个image类 class Image{ private static $info; #图片基本信息 private static $image; #内存中的图片 public function __construct($src){ #判断文件 if(!is_file($src)){ return false; } #如果不是文件,直接返回 //获取图片信息 $info = getimagesize($src); self::$info=array( 'width'=>$info[0], 'height'=>$info[1], 'type'=>image_type_to_extension($info[2],false), 'mime'=>$info['mime'] ); //获取图片信息 $type=self::$info['type']; $fun ="imagecreatefrom{$type}"; self::$image = $fun($src); } /** * @param int $width $height 应该在配置文件中声明使用,可取消参数 * @return 缩略图 图片资源 * 缩略图的形成与使用 */ public function thumb($width ,$height){ //新建镇色彩图片 $image_thumb =imagecreatetruecolor($width ,$height); #获取图片的宽高比 $src_m = self::$info['width'] / self::$info['height']; #源文件空格比 $dst_m = $width / $height; #缩略图宽高比 #源文件图片是 N:1 型的 宽不变, 改变高 if($src_m > $dst_m ){ $cha_width = $width; $cha_height = ceil($width / $src_m) ; }else{ #源文件图片是 1:N 型的 高不变,改变宽 $cha_width = floor($height * $src_m) ; $cha_height = $height ; } #对缩略图的其实位置进行重置 $dst_x = ($width - $cha_width) /2 ; $dst_y = ($height - $cha_height) /2 ; imagecopyresampled($image_thumb ,self::$image , $dst_x , $dst_y ,0 , 0, $cha_width , $cha_height ,self::$info['width'],self::$info['height']); #生成缩略图 self::$image =$image_thumb; // #显示缩略图图片 // self::show(self::$image); #保存缩略图 self::save(self::getNewName()); //销毁图片 imagedestroy($this->image_thumb); #返回缩略图名字 return self::getNewName(); } #水印的生成坐标 private static function setLocal($pos){ #对 pos 参数进行判断 , 指定相应的水印生成坐标 #水印图片在config 文件中记录 $conf['mark'] switch ($pos) { case 1: $x = 0; $y = 0; break ; case 2: default: $x = self::$info['width']-50; $y = self::$info['height']-50; #不该是20 这个定制, 应该改成水印图片的宽高 } return $local=array('x' => $x ,'y'=>$y); } #添加文字水印 public function fontMark($content ,$font_url ,$size,$angle){ #字体颜色 $col = imagecolorallocatealpha(self::$image,mt_rand(200,255),mt_rand(200,255),mt_rand(200,255),20); #获取水印输出位置坐标 $local = self::setLocal(2); imagettftext(self::$image,$size,$angle,$local['x'],$local['y'],$col,$font_url,$content); #显示缩略图图片 self::show(self::$image); #保存文字水印 没有添加保存路径 self::save(self::getNewName()); #返回水印图片的名字 return self::getNewName(); } #添加图片水印 public function imageMark($url ,$alpha){ $info= getimagesize($url); #获取图片信息 $type=image_type_to_extension($info[2],false); $fun = "imagecreatefrom{$type}"; #获取水印输出位置坐标 $local = self::setLocal(2); $water = $fun($url); #水印图片 imagecopymerge(self::$image, $water, $local['x'], $local['y'],0 , 0,$info[0] , $info[1], 30); #销毁图片水印 imagedestroy($water); #显示缩略图图片 self::show(self::$image); #保存图片水印 没有添加保存路径 self::save(self::getNewName()); #返回水印图片的名字 return self::getNewName(); } #生成随机的 图片名字 /** * @return string 返回一个新的名字 * */ private static function getNewName(){ #获取一个时间 $str = time(); #获取随机字符串 $string = "qwertyuiopasdfghjklzxcvbnmQWERTYUIOASDFGHJKZXCVBNM1234567890"; for($i=0 ; $i<br> <p> The above introduces the image processing class (improved version), including aspects of the content. I hope it will be helpful to friends who are interested in PHP tutorials. </p> <p> </p>

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