| header("Content-type:text/html ; charset=utf-8"); if (!empty($_POST['submit'])){ $url = $_POST['url']; //為了擷取相對路徑的圖片所做的操作 $url_fields = parse_url($url); $main_url = $url_fields['host']; $base_url = substr($url,0,strrpos($url, '/')+1); //擷取網頁內容 //設定Proxy 伺服器 $opts = array('http'=>array('request_fulluri'=>true)); $context = stream_context_create($opts); $content = file_get_contents($url,false,$context); //匹配img標籤,將所有匹配字串儲存到數組$matches $reg = "//i"; preg_match_all($reg, $content, $matches); $count = count($matches[0]); for ($i=0; $i<$count; $i++){ /*將所有圖片的url轉換為小寫 *$matches[1][$i] = strtolower($matches[1][$i]); */ //如果圖片為相對路徑就轉化為全路徑 if (!strpos('a'.$matches[1][$i], 'http')){ //因為'/'是第0個位置 if (strpos('a'.$matches[1][$i], '/')){ $matches[1][$i] = 'http://'.$main_url.$matches[1][$i]; }else{ $matches[1][$i] = $base_url.$matches[1][$i]; } } } //過濾重複的圖片 $img_arr = array_unique($matches[1]); //執行個體化圖片下載類 $getImg = new DownImage(); $url_count = count($img_arr); for ($i=0; $i<$url_count; $i++){ $getImg->source = $img_arr[$i]; $getImg->save_address = './pic/'; $file = $getImg->download(); } echo "下載完成!哈哈,簡單吧!"; } class DownImage{ public $source;//遠程圖片URL public $save_address;//儲存本地地址 public $set_extension; //設定圖片副檔名 public $quality; //圖片的品質(0~100,100最佳,預設75左右) //下載方法(選用GD庫圖片下載) public function download(){ //擷取遠程圖片資訊 $info = @getimagesize($this->source); //擷取圖片副檔名 $mime = $info['mime']; $type = substr(strrchr($mime, '/'), 1); //不同的圖片類型選擇不同的圖片產生和儲存函數 switch($type){ case 'jpeg': $img_create_func = 'imagecreatefromjpeg'; $img_save_func = 'imagejpeg'; $new_img_ext = 'jpg'; $image_quality = isset($this->quality) ? $this->quality : 100; break; case 'png': $img_create_func = 'imagecreatefrompng'; $img_save_func = 'imagepng'; $new_img_ext = 'png'; break; case 'bmp': $img_create_func = 'imagecreatefrombmp'; $img_save_func = 'imagebmp'; $new_img_ext = 'bmp'; break; case 'gif': $img_create_func = 'imagecreatefromgif'; $img_save_func = 'imagegif'; $new_img_ext = 'gif'; break; case 'vnd.wap.wbmp': $img_create_func = 'imagecreatefromwbmp'; $img_save_func = 'imagewbmp'; $new_img_ext = 'bmp'; break; case 'xbm': $img_create_func = 'imagecreatefromxbm'; $img_save_func = 'imagexbm'; $new_img_ext = 'xbm'; break; default: $img_create_func = 'imagecreatefromjpeg'; $img_save_func = 'imagejpeg'; $new_img_ext = 'jpg'; } //根據是否設定副檔名來合成本地檔案名稱 if (isset($this->set_extension)){ $ext = strrchr($this->source,"."); $strlen = strlen($ext); $newname = basename(substr($this->source,0,-$strlen)).'.'.$new_img_ext; }else{ $newname = basename($this->source); } //產生本地檔案路徑 $save_address = $this->save_address.$newname; $img = @$img_create_func($this->source); if (isset($image_quality)){ $save_img = @$img_save_func($img,$save_address,$image_quality); }else{ $save_img = @$img_save_func($img,$save_address); } return $save_img; } } ?> |