Php 从多维数组获取信息
几周前我发布了这个问题，得到了一些很好的反馈，但我没有清楚地发布我的问题，也没有得到解决问题的答案。所以，我正在重做这篇文章，然后再试一次 然而，php没有很好的函数来处理深度多维数组，这使得这很困难（但并非不可能！），这很可能是因为我选择了将数组格式化为人类可读的，而不是使其“更平坦”且更易于代码处理 我的所有源代码都可以通过Github获得： 问题 我有一个随机副本生成器，它从各种json源文件生成非常丰富的数据和嵌套数据。数组是动态的，因此它的结构会发生变化，但是有些键不会发生变化（多维数组中的每个数组都会为其生成一个uid） 所以我的数组看起来有点像这样：Php 从多维数组获取信息,php,arrays,multidimensional-array,Php,Arrays,Multidimensional Array,几周前我发布了这个问题，得到了一些很好的反馈，但我没有清楚地发布我的问题，也没有得到解决问题的答案。所以，我正在重做这篇文章，然后再试一次 然而，php没有很好的函数来处理深度多维数组，这使得这很困难（但并非不可能！），这很可能是因为我选择了将数组格式化为人类可读的，而不是使其“更平坦”且更易于代码处理 我的所有源代码都可以通过Github获得： 问题 我有一个随机副本生成器，它从各种json源文件生成非常丰富的数据和嵌套数据。数组是动态的，因此它的结构会发生变化，但是有些键不会发生变化（多维数
{"uid":"5796615f0c12c","intro":"While traveling in the wilderness, the characters fall into a sinkhole that opens beneath their feet, dropping them into the adventure location.","goal":"Retrieve a stolen item hidden in the dungeon.","starting_area":{"desc":"Circle, 40ft. diameter; one passage at each cardinal direction","width":40,"length":40,"height":10,"shape":"circle","passages":"N,E,W","doors":"S","tile":"starting_area_006.png","id":6,"uid":"5796615f0c48e","N":{"desc":"Continue straight 20ft., comes to a dead end.","width":10,"length":20,"height":10,"shape":"","passages":"","secret_chance":10,"doors":"S","tile":"passage_006.png","id":6,"secret":{"chance":15,"description":"No hidden doors found."},"uid":"5796615f0c974","from_uid":"5796615f0c48e","S":{"desc":"Wooden","width":5,"length":1,"height":10,"barred":0,"locked":0,"secret":0,"shape":"","tile":"","id":1,"uid":"5796615f0d04c","direction":"S"}},"E":{"desc":"Continue straight 20ft., then the passage turns right and continues 10ft.","width":10,"length":20,"height":10,"shape":"","passages":"","secret_chance":0,"doors":"","tile":"passage_008.png","id":8,"uid":"5796615f0d155","from_uid":"5796615f0c48e"},"W":{"desc":"Continue straight 20ft., side passage to the left, then an additional 10ft. ahead","width":10,"length":40,"height":10,"shape":"","passages":"E","secret_chance":0,"doors":"","tile":"passage_005.png","id":5,"uid":"5796615f0da1d","from_uid":"5796615f0c48e"}},"5796615f0e422":{"content":{"content":"Trap (see 'Random Traps')","monster":0,"treasure":0,"trap":1,"id":7},"desc":"Chapel where the lair's inhabitants worship","doors":"","height":10,"id":6,"length":0,"passages":"S","purpose":"Trap designed to kill or capture creatures","shape":"square","state":"Holes, floor partially collapsed","tile":"chamber_006.png","uid":"5796615f0e520","width":0,"S":{"desc":"Continue straight 20ft., comes to a dead end.","width":10,"length":20,"height":10,"shape":"","passages":"","secret_chance":0,"doors":"","tile":"passage_009.png","id":9,"uid":"5796615f0ffc7","from_uid":"5796615f0e520"}},"5796615f10c68":{"content":{"content":"Monster (random creature)","monster":1,"treasure":0,"trap":0,"id":5},"desc":"Kennel for pets or guard beasts","doors":"E","height":10,"id":9,"length":0,"monster":[{"name":"giant weasel","size":"M","rarity":"common","cr":1,"xp":400,"ac":15,"touch-ac":14,"flat-footed-ac":14,"hp":9,"FORT":3,"REF":7,"WILL":1,"init":4,"melee":"bite","melee_hit":5,"melee_dmg":"1d6+3","Str":14,"Dex":19,"Con":10,"Int":2,"Wis":13,"Cha":11,"environments":"land","treasure":0,"desc":"The predatory nature of this wolf-sized creature is revealed by its long teeth, sleekly muscular body, and belligerent hiss.","info":"<p>Like their smaller cousins, giant weasels have long, slender bodies and short legs, and come in a variety of colors from reddish brown to snowy white.<\/p>Giant weasels are active and tenacious predators, and have a reputation for being as clever as they are quick. 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希望这能更好地解释这个问题。谢谢你的时间 我认为最好的方法是使用json_decode（）将json格式化为数组 然后循环遍历数组，检查uid是否与所需的值匹配，如果匹配，则获取结果 像这样的东西可能会有帮助
$array[$i]->starting_area[$j]->N[$k]->passage
可能会为您提供所需的值我认为最好的方法是使用json_decode（）将json格式化为数组 然后循环遍历数组，检查uid是否与所需的值匹配，如果匹配，则获取结果 像这样的东西可能会有帮助
$array[$i]->starting_area[$j]->N[$k]->passage
可能会为您提供所需的值首先，您可能需要检查您发布的
jsonJSON字符串uid首先，您可能需要检查您发布的json
字符串。。。它可能没有正确格式化，或者它的某些部分可能没有正确复制和粘贴。在任何情况下，数据都是为了在这篇文章中使用而重建的
把这一观察抛在脑后；下面是一个有注释的函数，可以帮助您做到这一点。。。（返回“通道”的值，其中uid=5790de65145bc）。该函数接受2个参数。第一个参数是JSON字符串
，第二个参数是要获取段落的uid
。你不妨试试看
您对数据结构的控制程度如何？UID似乎是一个很好的候选键，而不仅仅是集合中的另一个元素。我完全可以控制它，它只是我个人的学习项目。UID只是一种为东西提供唯一ID的方法，这样我就可以针对数组的某些部分（我在这里遇到了麻烦），我试图让它成为人类可读的，事实证明这样做很难。你说得对，我试图修复它，但遇到了麻烦。我的项目实际上在github上：有完整的数据文件。我希望重做这个条目，并澄清我的数据是动态的，因此我需要一种灵活的方法来查找数据。您对数据的结构有多大的控制？UID似乎是一个很好的候选键，而不仅仅是集合中的另一个元素。我完全可以控制它，它只是我个人的学习项目。UID只是一种为东西提供唯一ID的方法，这样我就可以针对数组的某些部分（我在这里遇到了麻烦），我试图让它成为人类可读的，事实证明这样做很难。你说得对，我试图修复它，但遇到了麻烦。我的项目实际上在github上：有完整的数据文件。我希望重做这个条目，并澄清我的数据是动态的，因此我需要一种灵活的方法来查找数据。json是有效的（我使用jsonlint和内部json检查程序来验证外部json数据的格式），我可能发布了一个错误的片段…（很可能）。我会尝试你的样品，并尽快回复谢谢$iPassages=getPassagesByUID（$_SESSION['dungeon'，$GenerateQueue[0]）；其中$GenerateQueue[0]=5790de65145bc和$U会话['dungeon']是上述数组，返回null。当我回显返回的$key值时，我得到：uid intro goal start_区域-它没有进入数组，只是停留在表面级别…：-（@DavidWhite会再看一次……现在知道问题可能在哪里了be@DavidWhite但是，再次检查它，要非常小心，生成的JSON数据
不是原始数据，而是一个JSON字符串
，否则它将不起作用……无论如何，您也可以在这里测试它：尝试一下，产生一些提示和1个致命错误。。让我调整一下。不喜欢：$passion=$data->N->passion；注意：尝试获取非对象的属性，我会尝试调整它。哦，我删除了json解码，因为我不需要它，因为此时我的数据是$\u会话数组。我不应该说json数据…因为它不在这个阶段。json是有效的（我使用jsonlint和内部json检查程序来验证我的外部json数据的格式），我可能发布了一个错误的代码片段…（很可能）。我将尝试您的示例并尽快回复，谢谢！！$iPassages=getPassagesByUID（$_SESSION['dungeon']，$GenerateQueue[0]）；其中$GenerateQueue[0]=5790de65145bc和$_SESSION['dungeon']是上面的数组，r
$array = json_decode($json_string) // Considering json_string holds your json array
$array[$i]->starting_area[$j]->N[$k]->passage
<?php
// THIS MUST BE A JSON STRING... NOT AN ARRAY OR PHP OBJECT...
// HOWEVER, IF YOU ARE GENERATING AN A PHP OBJECT (AND NOT JSON STRING)
// THE FUNCTION WOULD STILL WORK BUT YOU HAVE TO
// SIMPLY NOT DO A json_decode WITHIN THE FUNCTION
$strJson = '{"uid":"5790de6513913","intro":"While traveling in the wilderness, the characters fall into a sinkhole that opens beneath their feet, dropping them into the adventure location.","goal":"Retrieve a stolen item hidden in the dungeon.","starting_area":{"desc":"Circle, 40ft. diameter; one passage at each cardinal direction","width":40,"length":40,"height":10,"shape":"circle","passages":"N,E,W","doors":"S","tile":"starting_area_006.png","id":6,"uid":"5790de6513da8","N":{"passage":{"desc":"Continue straight 20ft., comes to a dead end.","width":10,"length":20,"height":10,"shape":"","passages":"211","secret_chance":10,"doors":"S","tile":"passage_006.png","id":6,"uid":"5790de65145bc","from_uid":"5790de6513da8","secret":{"chance":15,"description":"No hidden doors found."}}}}}';
$iPassages = getPassagesByUID($strJson, "5790de65145bc");
var_dump($iPassages); //<== DISPLAYS:: int 211
function getPassagesByUID($jsonString, $uid){
// DECODE/CONVERT THE $jsonString INTO A PHP OBJECT.
// IF $jsonString IS ALREADY A PHP OBJECT, YOU DON'T HAVE TO json_decode IT;
// INSTEAD THE LINE BELOW SHOULD READ:
// $objJson = $jsonString; //SO BE CAREFUL WHAT YOU PASS IN ;-)
$objJson = json_decode($jsonString);
// LOOP THROUGH ALL THE ENTRIES IN THE JSON OBJECT
foreach($objJson as $key=>$data){
// CHECK IF THE PROPERTY IS starting_area
// (SINCE starting_area CONTAINS THE N OBJECT WHICH CONTAINS THE PASSAGE OBJECT)
if($key == "starting_area"){
// IF THAT IS THE CASE, GET THE passage OBJECT & STORE IT IN A VARIABLE
$passage = $data->N->passage;
// CHECK IF THE PROPERTY passages EXIST ON THIS PASSAGE OBJECT
// AND THAT THE uid PROPERTY MATCHES THE $uid GIVEN AS A PARAMETER
if(property_exists($passage, "passages") && $passage->uid == $uid){
// IF IT DOES, RETURN THE VALUE THEREOF
return $passage->passages;
}
}
}
return null;
}
<?php
$jsonString = '{
"uid" : "5790de6513913",
"intro" : "While traveling in the wilderness, the characters fall into a sinkhole that opens beneath their feet, dropping them into the adventure location.",
"goal" : "Retrieve a stolen item hidden in the dungeon.",
"starting_area" : {
"desc" : "Circle, 40ft. diameter; one passage at each cardinal direction",
"width" : 40,
"length" : 40,
"height" : 10,
"shape" : "circle",
"passages" : "N,E,W",
"doors" : "S",
"tile" : "starting_area_006.png",
"id" : 6,
"uid" : "5790de6513da8",
"N" : {
"passage": {
"desc" : "Continue straight 20ft., comes to a dead end.",
"width" : 10,
"length" : 20,
"height" : 10,
"shape" : "",
"passages" : "211",
"secret_chance" : 10,
"doors" : "S",
"tile" : "passage_006.png",
"id" : 6,
"uid" : "5790de65145bc",
"from_uid" : "5790de6513da8",
"secret" : {
"chance" : 15,
"description" : "No hidden doors found."
}
}
}
}
}';