php图片上传类同时可生成缩略图与加水印
作者：袖梨
2022-06-24
| 代码如下 | 复制代码 |
| class upimages { var $annexfolder = "upload";//附件存放点，默认为：annex var $smallfolder = "small";//缩略图存放路径，注：必须是放在 $annexfolder下的子目录，默认为：smallimg var $markfolder = "mark";//水印图片存放处 var $upfiletype = "jpg gif png";//上传的类型，默认为：jpg gif png rar zip var $upfilemax = 1024;//上传大小限制，单位是"kb"，默认为：1024kb var $fonttype;//字体 var $maxwidth = 500; //图片最大宽度 var $maxheight = 600; //图片最大高度 function upimages($annexfolder,$smallfolder,$includefolder) { $this->annexfolder = $annexfolder; $this->smallfolder = $smallfolder; $this->fonttype = $includefolder."/04b_08__.ttf"; } function upload($inputname) { $imagename = time();//设定当前时间为图片名称 if(@empty($_files[$inputname]["name"])) die("没有上传图片信息，请确认"); $name = explode(".",$_files[$inputname]["name"]);//将上传前的文件以"."分开取得文件类型 $imgcount = count($name);//获得截取的数量 $imgtype = $name[$imgcount-1];//取得文件的类型 if(strpos($this->upfiletype,$imgtype) === false) die(error("上传文件类型仅支持 ".$this->upfiletype." 不支持 ".$imgtype)); $photo = $imagename.".".$imgtype;//写入数据库教程的文件名 $uploadfile = $this->annexfolder."/".$photo;//上传后的文件名称 $upfileok = move_uploaded_file($_files[$inputname]["tmp_name"],$uploadfile); if($upfileok) { $imgsize = $_files[$inputname]["size"]; $ksize = round($imgsize/1024); if($ksize > ($this->upfilemax*1024)) { @unlink($uploadfile); die(error("上传文件超过 ".$this->upfilemax."kb")); } } else { die(error("上传图片失败，请确认你的上传文件不超过 $upfilemax kb 或上传时间超时")); } return $photo; } function getinfo($photo) { $photo = $this->annexfolder."/".$photo; $imageinfo = getimagesize($photo); $imginfo["width"] = $imageinfo[0]; $imginfo["height"] = $imageinfo[1]; $imginfo["type"] = $imageinfo[2]; $imginfo["name"] = basename($photo); return $imginfo; } function smallimg($photo,$width=128,$height=128) { $imginfo = $this->getinfo($photo); $photo = $this->annexfolder."/".$photo;//获得图片源 $newname = substr($imginfo["name"],0,strrpos($imginfo["name"], "."))."_thumb.jpg";//新图片名称 if($imginfo["type"] == 1) { $img = imagecreatefromgif($photo); } elseif($imginfo["type"] == 2) { $img = imagecreatefromjpeg($photo); } elseif($imginfo["type"] == 3) { $img = imagecreatefrompng($photo); } else { $img = ""; } if(empty($img)) return false; $width = ($width > $imginfo["width"]) ? $imginfo["width"] : $width; $height = ($height > $imginfo["height"]) ? $imginfo["height"] : $height; $srcw = $imginfo["width"]; $srch = $imginfo["height"]; if ($srcw * $width > $srch * $height) { $height = round($srch * $width / $srcw); } else { $width = round($srcw * $height / $srch); } if (function_exists("imagecreatetruecolor")) { $newimg = imagecreatetruecolor($width, $height); imagecopyresampled($newimg, $img, 0, 0, 0, 0, $width, $height, $imginfo["width"], $imginfo["height"]); } else { $newimg = imagecreate($width, $height); imagecopyresized($newimg, $img, 0, 0, 0, 0, $width, $height, $imginfo["width"], $imginfo["height"]); } if ($this->tofile) { if (file_exists($this->annexfolder."/".$this->smallfolder."/".$newname)) @unlink($this->annexfolder."/".$this->smallfolder."/".$newname); imagejpeg($newimg,$this->annexfolder."/".$this->smallfolder."/".$newname); return $this->annexfolder."/".$this->smallfolder."/".$newname; } else { imagejpeg($newimg); } imagedestroy($newimg); imagedestroy($img); return $newname; } function watermark($photo,$text) { $imginfo = $this->getinfo($photo); $photo = $this->annexfolder."/".$photo; $newname = substr($imginfo["name"], 0, strrpos($imginfo["name"], ".")) . "_mark.jpg"; switch ($imginfo["type"]) { case 1: $img = imagecreatefromgif($photo); break; case 2: $img = imagecreatefromjpeg($photo); break; case 3: $img = imagecreatefrompng($photo); break; default: return false; } if (empty($img)) return false; $width = ($this->maxwidth > $imginfo["width"]) ? $imginfo["width"] : $this->maxwidth; $height = ($this->maxheight > $imginfo["height"]) ? $imginfo["height"] : $this->maxheight; $srcw = $imginfo["width"]; $srch = $imginfo["height"]; if ($srcw * $width > $srch * $height) { $height = round($srch * $width / $srcw); } else { $width = round($srcw * $height / $srch); } if (function_exists("imagecreatetruecolor")) { $newimg = imagecreatetruecolor($width, $height); imagecopyresampled($newimg, $img, 0, 0, 0, 0, $width, $height, $imginfo["width"], $imginfo["height"]); } else { $newimg = imagecreate($width, $height); imagecopyresized($newimg, $img, 0, 0, 0, 0, $width, $height, $imginfo["width"], $imginfo["height"]); } $white = imagecolorallocate($newimg, 255, 255, 255); $black = imagecolorallocate($newimg, 0, 0, 0); $alpha = imagecolorallocatealpha($newimg, 230, 230, 230, 40); imagefilledrectangle($newimg, 0, $height-26, $width, $height, $alpha); imagefilledrectangle($newimg, 13, $height-20, 15, $height-7, $black); imagettftext($newimg, 4.9, 0, 20, $height-14, $black, $this->fonttype, $text[0]); imagettftext($newimg, 4.9, 0, 20, $height-6, $black, $this->fonttype, $text[1]); if($this->tofile) { if (file_exists($this->annexfolder."/".$this->markfolder."/".$newname)) @unlink($this->annexfolder."/".$this->markfolder."/".$newname); imagejpeg($newimg,$this->annexfolder."/".$this->markfolder."/".$newname); return $this->annexfolder."/".$this->markfolder."/".$newname; } else { imagejpeg($newimg); } imagedestroy($newimg); imagedestroy($img); return $newname; } } |
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