php 三维数组转二维数组(多维数组变合拼二维数组)(foreach循环数组叠加)合拼array

tech2023-06-25 107

方法一：

getdata()取得值格式

[0] => array(6) { ["id"] => string(2) "41" ["type"] => string(1) "2" ["fraction"] => string(3) "4.0" ["answer"] => string(3) "A,B" } [1] => array(6) { ["id"] => string(2) "45" ["type"] => string(1) "2" ["fraction"] => string(3) "4.0" ["answer"] => string(1) "B" } foreach($list as $k=>$val){ $data2=[]; $data2 = getdata($k); $data=array_merge($data,$data2); }

合拼的数组键值是从0开始的

$data=array_merge($data,$data2);

方法二：

foreach($list as $k=>$val){ $data2=[]; $data2 = getdata($k); $data=$data+$data2; }

合拼的数组键值不改变

其它案例：

/*************** * @function 三维数组转二维数组 * @Param: $array : 传入参数 * @Return: $tempArr 返回结果数组 ***************/ function array3_to_array2($array){ $array = array_filter($array); $array = array_values($array); foreach ($array as $orderKey =>$orderVal){ $count = count($orderVal); if($count > 1){ for ($i = 0;$i < $count;$i++){ $tempArr[] = $orderVal[$i]; } }else{ $tempArr[] = $orderVal[0]; } } return $tempArr; }

例子：三维数组

[0] => array(19) { [0] => array(47) { ["pid"] => string(3) "291" ["bigclass"] => NULL ["title"] => string(4) "Html" ["class_id"] => string(1) "0" ["starttime"] => NULL ["endtime"] => NULL } [1] => array(47) { ["pid"] => string(3) "291" ["bigclass"] => string(3) "566" ["title"] => string(29) "HTML+css入门课程第一节" ["class_id"] => string(1) "0" ["starttime"] => string(19) "2020-07-14 09:36:36" ["endtime"] => string(19) "2020-07-14 11:16:36" } } [1] => array(14) { [0] => array(47) { ["pid"] => string(3) "128" ["bigclass"] => NULL ["title"] => string(9) "第一章" ["class_id"] => NULL ["starttime"] => NULL ["endtime"] => NULL } [1] => array(47) { ["pid"] => string(3) "128" ["bigclass"] => string(3) "288" ["title"] => string(13) "今天课程2" ["class_id"] => NULL ["starttime"] => string(19) "2019-04-18 00:00:00" ["endtime"] => string(19) "2019-04-18 00:30:00" } [2] => array(47) { ["pid"] => string(3) "128" ["bigclass"] => string(3) "288" ["title"] => string(13) "今天课程3" ["class_id"] => NULL ["starttime"] => string(19) "2019-04-22 09:57:24" ["endtime"] => string(19) "2019-04-22 10:27:24" } } }

最终效果：

array(33) { [0] => array(47) { ["pid"] => string(3) "291" ["bigclass"] => NULL ["title"] => string(4) "Html" ["class_id"] => string(1) "0" ["starttime"] => NULL ["endtime"] => NULL } [1] => array(47) { ["pid"] => string(3) "291" ["bigclass"] => string(3) "566" ["title"] => string(29) "HTML+css入门课程第一节" ["class_id"] => string(1) "0" ["starttime"] => string(19) "2020-07-14 09:36:36" ["endtime"] => string(19) "2020-07-14 11:16:36" } [2] => array(47) { ["pid"] => string(3) "291" ["bigclass"] => string(3) "566" ["title"] => string(20) "HTML+css入门课程" ["class_id"] => string(1) "0" ["starttime"] => string(19) "2020-07-15 17:45:56" ["endtime"] => string(19) "2020-07-15 19:45:56" } [3] => array(47) { ["pid"] => string(3) "291" ["bigclass"] => string(3) "566" ["title"] => string(29) "HTML+css入门课程第二节" ["class_id"] => string(1) "0" ["starttime"] => string(19) "2020-07-16 09:37:21" ["endtime"] => string(19) "2020-07-16 11:37:21" } [4] => array(47) { ["pid"] => string(3) "291" ["bigclass"] => string(3) "566" ["title"] => string(32) "123HTML+css入门课程第二节" ["class_id"] => string(1) "0" ["starttime"] => string(19) "2020-07-16 14:33:15" ["endtime"] => string(19) "2020-07-16 17:03:15" } [5] => array(47) { ["pid"] => string(3) "291" ["bigclass"] => string(3) "566" ["title"] => string(31) "01HTML+css入门课程第一节" ["class_id"] => string(1) "0" ["starttime"] => string(19) "2020-07-16 17:37:18" ["endtime"] => string(19) "2020-07-16 19:17:18" } [6] => array(47) { ["pid"] => string(3) "291" ["bigclass"] => string(3) "566" ["title"] => string(32) "666HTML+css入门课程第一节" ["class_id"] => string(1) "0" ["starttime"] => string(19) "2020-07-17 09:43:25" ["endtime"] => string(19) "2020-07-17 12:13:25" } [7] => array(47) { ["pid"] => string(3) "291" ["bigclass"] => string(3) "566" ["title"] => string(31) "22HTML+css入门课程第一节" ["class_id"] => string(1) "0" ["starttime"] => string(19) "2020-07-17 14:16:34" ["endtime"] => string(19) "2020-07-17 17:16:34" } }

参考：https://www.cnblogs.com/fan-bk/p/8555800.html

php,合并数组,合并一维数组,合并二维数组,合并多维数组

合并数组

例子1：

<?php

$msg = [

　　"code" => "0",

　　"msg" => "",

　　"count" => "",

];

$data = [

　　"name" => "lady",

　　"age" => "0",

　　"count" => "0",

];

$msg['data'] = $data;

print_r($msg);

输出：

Array

(

　　[code] => 0

　　[msg] =>

　　[count] =>

　　[data] => Array

　　(

　　　　[name] => lady

　　　　[age] => 0

　　　　[count] => 0

　　)

例子二:

<?php

$a1 = [

'red', 'green',

];

$a2 = [

'blue', 'yellow',

];

print_r(array_merge($a1, $a2));

输出：

Array

(

　　[0] => red

　　[1] => green

　　[2] => blue

　　[3] => yellow

)

例子三:

<?php

$a1 = [

'apple' => 'red',

'banner' => 'yellow',

];

$a2 = [

'pear' => 'yellwo',

'apple' => 'green',

];

$result = array_merge_recursive($a1, $a2);

print_r($result);

输出：

Array

(

[apple] => Array

(

[0] => red

[1] => green

)

[banner] => yellow

[pear] => yellwo

)

例子四:

<?php

$a = array('color' => 'red');

$b = array('color' => 'blue', 'type' => 'fruit');

$arr = $a + $b;

print_r($arr);

输出：

Array

(

[color] => red

[type] => fruit

)

例子五:

<?php

$a = [

[

'id' => '1',

'name' => '张三',

'age' => '18',

[

'id' => '1',

'name' => '小米',

'age' => '15',

[

'id' => '3',

'name' => '张三',

'age' => '20',

[

'id' => '3',

'name' => '张六',

'age' => '29',

[

'id' => '3',

'name' => '张三疯',

'age' => '20',

];

$b = [];

foreach ($a as $k => $v) {

if (!isset($b[$v['id']])) {

$b[$v['id']] = $v;

} else {

$b[$v['id']]['name'] .= ',' . $v['name'];

}

// echo '<pre>';

print_r(array_values($b));

输出：

Array

(

[0] => Array

(

[id] => 1

[name] => 张三,小米

[age] => 18

)

[1] => Array

(

[id] => 3

[name] => 张三,张六,张三疯

[age] => 20

)

例子六：

<?php

$arr = array(

array(

'id' => 1,

'pid' => 0,

'name' => '新闻分类',

array(

'id' => 2,

'pid' => 0,

'name' => '最新公告',

array(

'id' => 3,

'pid' => 1,

'name' => '国内新闻',

array(

'id' => 4,

'pid' => 1,

'name' => '国际新闻',

array(

'id' => 5,

'pid' => 0,

'name' => '图片分类',

array(

'id' => 6,

'pid' => 5,

'name' => '新闻图片',

array(

'id' => 7,

'pid' => 5,

'name' => '其它图片',

);

//整理函数

/**

* 生成无限级树算法

* @author Baiyu 2014-04-01

* @param array $arr 输入数组

* @param number $pid 根级的pid

* @param string $column_name 列名,id|pid父id的名字|children子数组的键名

* @return array $ret

function make_tree($arr, $pid = 0, $column_name = 'id|pid|children') {

list($idname, $pidname, $cldname) = explode('|', $column_name);

$ret = array();

foreach ($arr as $k => $v) {

if ($v[$pidname] == $pid) {

$tmp = $arr[$k];

unset($arr[$k]);

$tmp[$cldname] = make_tree($arr, $v[$idname], $column_name);

$ret[] = $tmp;

}

return $ret;

}

$output_array = make_tree($arr);

print_r($output_array);

输出:

Array

(

[0] => Array

(

[id] => 1

[pid] => 0

[name] => 新闻分类

[children] => Array

(

[0] => Array

(

[id] => 3

[pid] => 1

[name] => 国内新闻

[children] => Array

(

)

[1] => Array

(

[id] => 4

[pid] => 1

[name] => 国际新闻

[children] => Array

(

)

[1] => Array

(

[id] => 2

[pid] => 0

[name] => 最新公告

[children] => Array

(

)

[2] => Array

(

[id] => 5

[pid] => 0

[name] => 图片分类

[children] => Array

(

[0] => Array

(

[id] => 6

[pid] => 5

[name] => 新闻图片

[children] => Array

(

)

[1] => Array

(

[id] => 7

[pid] => 5

[name] => 其它图片

[children] => Array

(

)

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php 三维数组转二维数组(多维数组变合拼二维数组)(foreach循环 数组叠加)合拼array

方法一：

方法二：

其它案例：

参考：https://www.cnblogs.com/fan-bk/p/8555800.html

php,合并数组,合并一维数组,合并二维数组,合并多维数组

合并数组

php 三维数组转二维数组(多维数组变合拼二维数组)(foreach循环数组叠加)合拼array