php代码如下:复制代码代码如下:php
array('request_fulluri'=>true));$context = stream_context_create($opts);$content = file_get_contents($url,false,$context);//匹配img标签,将所有匹配字符串保存到数组$matches$reg = "//i";preg_match_all($reg, $content, $matches);$count = count($matches[0]);for ($i=0; $i/*将所有图片的url转换为小写*$matches[1][$i] = strtolower($matches[1][$i]);*///如果图片为相对路径就转化为全路径if (!strpos('a'.$matches[1][$i], 'http')){//因为'/'是第0个位置if (strpos('a'.$matches[1][$i], '/')){$matches[1][$i] = 'http://'.$main_url.$matches[1][$i];}else{$matches[1][$i] = $base_url.$matches[1][$i];}}}//过滤重复的图片$img_arr = array_unique($matches[1]);//实例化图片下载类$getImg = new DownImage();$url_count = count($img_arr);for ($i=0; $i$getImg->source = $img_arr[$i];$getImg->save_address = './pic/';$file = $getImg->download();}echo "下载完成！哈哈，简单吧！";}class DownImage{public $source;//远程图片URL public $save_address;//保存本地地址public $set_extension; //设置图片扩展名public $quality; //图片的质量（0~100,100最佳，默认75左右）
//下载方法（选用GD库图片下载）
public function download(){//获取远程图片信息$info = @getimagesize($this->source);//获取图片扩展名$mime = $info['mime'];$type = substr(strrchr($mime, '/'), 1);//不同的图片类型选择不同的图片生成和保存函数switch($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';$new_img_ext = 'jpg';}//根据是否设置扩展名来合成本地文件名if (isset($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);}//生成本地文件路径$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;}}?>
远程url地址：
运行结果如图：
下载的图片本例中保存在当前目录的pic文件夹下！