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
(
)
)
)
)
)
