<?php //缩略图类 class Thumb{ public static $thumb_prefix = ‘‘;//缩略图前缀 public static $thumb_savePath = ‘‘;//缩略图保存路径 public static $thumb_width = ‘‘;//缩略图宽度 public static $thumb_height = ‘‘;//缩略图高度 public static function save($sPath){//保存为缩略图,传入一个实参 $imgArr = self::getImageInfo($sPath);//获取图片信息 if (is_array($imgArr)) { //将三个静态属性以逗号为分隔拆分为数组,实现多张缩略图的生成 $thumb_prefix_arr = explode(‘,‘, self::$thumb_prefix); $thumb_width_arr = explode(‘,‘, self::$thumb_width); $thumb_height_arr = explode(‘,‘, self::$thumb_height); $countP = count($thumb_prefix_arr); $countW = count($thumb_width_arr); $countH = count($thumb_height_arr); if ($countP>0 && $countP==$countW && $countW==$countH) { //遍历一个数组,生成多张缩略图 $reArr = array(); foreach ($thumb_prefix_arr as $key=>$value){ //生成空白画布并填充颜色 $image = imagecreatetruecolor($thumb_width_arr[$key], $thumb_height_arr[$key]); $color = imagecolorallocate($image, 255, 255, 255);//白色 imagefill($image, 0, 0, $color); //计算出缩略比例 $width_scale = $imgArr[‘width‘]/$thumb_width_arr[$key];//宽比 $height_scale = $imgArr["height"]/$thumb_height_arr[$key];//高比 $scale = $width_scale>$height_scale ? $width_scale : $height_scale; //计算缩略图宽高 $width = $imgArr["width"]/$scale; $height = $imgArr["height"]/$scale; //到目标图片的位置 $dst_x = ($thumb_width_arr[$key]-$width)/2; $dst_y = ($thumb_height_arr[$key]-$height)/2; //获取原始图片资源并拷贝 $src_image = $imgArr["createFunName"]($sPath);//获取原始图片资源 imagecopyresized($image, $src_image, $dst_x, $dst_y, 0, 0, $width, $height, $imgArr["width"], $imgArr["height"]); //保存并返回值 $re = $imgArr[‘saveFunName‘]($image,self::$thumb_savePath.‘/‘.$thumb_prefix_arr[$key].$imgArr[‘name‘]); $reArr[$key] = $re; } //销毁缩略图资源及原图片资源,释放内存 imagedestroy($image); imagedestroy($src_image); return $reArr;//返回数组 }else{ return false; } }else{ return false; } } protected static function getImageInfo($path){ if (is_file($path)) { $imgArr = getimagesize($path); if (is_array($imgArr)) {//如果$imgArr是一个数组,则说明$path是一个真实图片 //判断不同的图片类型,使用变量函数,生成图片资源:$createFunName,保存图片资源:$saveFunName switch ($imgArr[‘mime‘]){ case ‘image/jpeg‘: case ‘image/pjpeg‘: $createFunName = ‘imagecreatefromjpeg‘; $saveFunName = ‘imagejpeg‘; break; case ‘image/png‘: $createFunName = ‘imagecreatefrompng‘; $saveFunName = ‘imagepng‘; break; case ‘image/gif‘: $createFunName = ‘imagecreatefromgif‘; $saveFunName = ‘imagegif‘; break; default: return false; } //获取原图片名称 $oldName = pathinfo($path,PATHINFO_BASENAME); //返回图片信息数组 return array( ‘name‘=>$oldName, ‘type‘=>$imgArr[‘mime‘], ‘width‘=>$imgArr[0], ‘height‘=>$imgArr[1], ‘createFunName‘=>$createFunName, ‘saveFunName‘=>$saveFunName ); } }else{ return false; } } }
时间: 2024-10-13 00:03:25