之前我们讲解过使用javascript获取json数据节点路径的问题，今天我们更进一步，讲解下php获取json数据所有的节点路径
<?php function iterTree($data) { $retData = array(); $data = json_decode($data, true); if (!is_array($data) && empty($data)) { echo 'error !' ."n"; } else { $queue = array(); foreach ($data as $field => $value) { $queue[] = $field; } $head = 0; $tail = count($queue); while ($head < $tail) { $field = $queue[$head++]; $path = explode("https://www.jb51.net/", $field); $tmpData = &$data; foreach ($path as $key => $ph) { $tmpData = &$tmpData[$ph]; } if (is_array($tmpData) && !empty($tmpData)) { $newField = $field; foreach ($tmpData as $curField => $curValue) { $newField = $field . 'https://www.jb51.net/' . $curField; $queue[$tail++] = $newField; } } else { $retData[] = $field; } } } return $retData; } //测试数据 $data = file_get_contents("http://restapi.ele.me/v1/restaurants?extras%5B%5D=food_activity&extras%5B%5D=restaurant_activity&extras%5B%5D=certification&fields%5B%5D=id&fields%5B%5D=name&fiel ds%5B%5D=phone&fields%5B%5D=promotion_info&fields%5B%5D=name_for_url&fields%5B%5D=flavors&fields%5B%5D=is_time_ensure&fields%5B%5D=is_premium&fields%5B%5D=image_path&fields%5B%5D=rating&fie lds%5B%5D=is_free_delivery&fields%5B%5D=minimum_order_amount&fields%5B%5D=order_lead_time&fields%5B%5D=is_support_invoice&fields%5B%5D=is_new&fields%5B%5D=is_third_party_delivery&fields%5B% 5D=is_in_book_time&fields%5B%5D=rating_count&fields%5B%5D=address&fields%5B%5D=month_sales&fields%5B%5D=delivery_fee&fields%5B%5D=minimum_free_delivery_amount&fields%5B%5D=minimum_order_des cription&fields%5B%5D=minimum_invoice_amount&fields%5B%5D=opening_hours&fields%5B%5D=is_online_payment&fields%5B%5D=status&fields%5B%5D=supports&fields%5B%5D=in_delivery_area&geohash=wx4g07 j0w1v7&is_premium=0&limit=1000&offset=24&type=geohash"); $ret = iterTree($data); print_r($ret);