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PHP implements recursive deletion of a value in a multidimensional array
PHP implements recursive deletion of a value in a multidimensional array
这篇文章主要介绍了PHP递归删除多维数组中的某个值,需要的朋友可以参考下
今天在做业务逻辑的过程中，需要在一个不确定的多维数组中删除某个特定的key,查了挺长时间加上自己的修改，终于满足了业务逻辑，该方法在修改后应该可以适用于很多地方，所以记录下来以备后用，我这里是一个多维数组，还是json_encode后的，主要目的是删除所有old_tags_id数组中有tag_id=264的数据，顺便要删除相应的tag_name，还有 addtag要减1,，代码如下:
先放递归函数，当然这里是核心，很多人看了这个应该就已经知道如何使用了.
public function dealMenuTagDelete(&$menuData, $tag_id)
{
if (!is_array($menuData)) {
return false;
}
foreach ($menuData as $key => $val) {
if ($key === 'old_tags_id') {
foreach ($val as $tagKey => $tagVaule) {
if ($tagVaule == $tag_id) {
unset($menuData['old_tags_id'][$tagKey]);
unset($menuData['old_tags'][$tagKey]);
$menuData['addtag']--;
}
}
}
if (is_array($val)) {
self::dealMenuTagDelete($menuData[$key], $tag_id);
}
}
return $menuData;
}维数组长这样，还是jeson_encode后的格式:
[ {
"typ": "res_ejcd",
"tit": "message1",
"data": "1@2@3",
"subdata": {
"zizicd1": {
"typ": "res_wb",
"data": "qqqq",
"addtag": 1,
"old_tags": [
"\"campaign综合分析\"",
"test add a tag"
],
"old_tags_id": [
"264",
"17"
],
"new_tags_id": [],
"tit": "1"
},
"zizicd2": {
"typ": "res_wb",
"data": "wwww",
"addtag": 1,
"old_tags": [
"test add a tag"
],
"old_tags_id": [
"17"
],
"new_tags_id": [],
"tit": "2"
},
"zizicd3": {
"typ": "res_wb",
"data": "ddd",
"addtag": 1,
"old_tags": [],
"old_tags_id": [],
"new_tags_id": [
"new_tag1"
],
"tit": "3"
}
},
"addtag": 0,
"old_tags": [],
"old_tags_id": [],
"new_tags_id": []
},
{
"typ": "res_tw",
"tit": "Post",
"data": "2121",
"subdata": null,
"addtag": 1,
"old_tags": [
"“519引号阅读user message图文”"
],
"old_tags_id": [
"183"
],
"new_tags_id": []
},
{
"typ": "res_wb",
"tit": "Today1",
"data": "12312321",
"subdata": null,
"addtag": 1,
"old_tags": [],
"old_tags_id": [],
"dynamicdata": "{\"default\":{\"message_type\":\"1\",\"val\":\"dynamic\"},\"segementation\":[{\"segId\":\"451\",\"message_type\":\"1\",\"val\":\"你属于conversation 80这一组\"},{\"segId\":\"450\",\"message_type\":\"1\",\"val\":\"poll-1212\\n有三个人，rainbow H T_T\"}]}",
"configId": "2392",
"new_tags_id": [
"new_tag2"
]
}
]然后赋值，调用
$tag_id = 264; $menuData = json_decode($data,true);//这里第二个参数用true就会转化为数组了 self::dealMenuTagDelete($menuData,$tag_id); print_r($menuData);
以上就是本文的全部内容，希望对大家的学习有所帮助。
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