PHP 代码 - 获取图片 URL，并缓存结果

require('xfm_simple_cache.v.2.php');\n#echo nice_baidu_get('百度', 1);\n\nrequire_once('3rd/phpQuery.php');\n\n$keyword = isset($_GET['kw'])?$_GET['kw']:'';\nif ($keyword !== '') {\n //header('location: '.'http://cdn.qianchusai.com/img/'.urlencode($keyword).'.jpg');\n //exit;\n $pn = '1';\n $s = $keyword;\n $ttt = explode(',', $s);\n $s = $ttt[0];\n $xfm_cache = xfm_get_cache_img($s);\n if ($xfm_cache !== '') {\n #xfm_delete_cache($_string);\n $img_url = $xfm_cache;\n header("Location: ".$img_url);\n exit;\n }\n else {\n $img_arr = get_article_v1($s, $pn);\n if (count($img_arr)>0) {\n $img_url = $img_arr[0];\n header("Location: ".$img_url);\n xfm_put_cache($s, $img_arr[0]);\n }\n else {\n header('location: '.'https://img2.baidu.com/it/u=3862871684,2562239546&fm=253&fmt=auto&app=138&f=JPEG?w=440&h=317');\n exit;\n }\n }\n}\nexit;