Question

我有一个包含许多键和值对的数组。我想用php数组中的一个键获取所有值。

我的结果如

 $seat=[
        (int) 0 => [
            (int) 0 => 'A_1',
            (int) 1 => 'A_2',
            (int) 2 => 'A_3',
            (int) 3 => 'A_4'
        ],
        (int) 1 => [
            (int) 0 => 'B_1',
            (int) 1 => 'B_2',
            (int) 2 => 'B_3'
        ]
    ]

我想改变如下语法。

$seat=[
        (int) 0 => [
            (int) 0 => 'A_1',
            (int) 1 => 'A_2',
            (int) 2 => 'A_3',
            (int) 3 => 'A_4'            
            (int) 4 => 'B_1',
            (int) 5 => 'B_2',
            (int) 6 => 'B_3'
        ]
    ]

谢谢大家：

Answer 1

试试这个，

<?php

$result = array();

$seat=array( 
    "0" => array("0" => 'A_1',"1" => 'A_2',"2" => 'A_3',"3" => 'A_4'),
    "1" => array("0" => 'B_1',"1" => 'B_2',"2" => 'B_3'),
    "2" => array("0" => 'C_1',"1" => 'C_2',"2" => 'C_3'));

for($i=0;$i<count($seat);$i++){
    $result = array_merge($result,$seat[$i]);   
}
echo "<pre>";print_r($result);

?>

<强> 输出

Array
(
    [0] => A_1
    [1] => A_2
    [2] => A_3
    [3] => A_4
    [4] => B_1
    [5] => B_2
    [6] => B_3
    [7] => C_1
    [8] => C_2
    [9] => C_3
)

Answer 2

只需使用array_merge功能。

$result = call_user_func_array('array_merge', $seat);

工作演示： http://phpio.net/s/1tx5

Answer 3

你可以这样做：

function flattenArray($arr) {
    $toflat = array($arr);
    $res = array();

    while (($r = array_shift($toflat)) !== NULL) {
        foreach ($r as $v) {
            if (is_array($v)) {
                $toflat[] = $v;
            } else {
                $res[] = $v;
            }
        }
    }

    return $res;
}

$newArray = array(flattenArray($array1)); // This will be your desired result

<强>输出：

// So for example, if you pass array to flatternArray($array) method:

$array = array:2 [
  0 => array:3 [
    0 => 1
    1 => 2
    2 => 3
  ]
  1 => array:3 [
    0 => 4
    1 => 5
    2 => 6
  ]
]

// then $newArray will results in:

array:1 [
  0 => array:6 [
    0 => 1
    1 => 2
    2 => 3
    3 => 4
    4 => 5
    5 => 6
  ]
]

希望这有帮助！

Answer 4

由于您的输入是索引数组，因此您只需将结构展平（使用经典的splat＆merge技术），然后将合并的结构推入一个空数组即可获得所需的结果（无需循环）。

代码：（Demo）

$seat = [
    ['A_1', 'A_2', 'A_3', 'A_4'],
    ['B_1', 'B_2', 'B_3'],
    ['C_1']
];

var_export(
    [array_merge(...$seat)]
);

输出：

array (
  0 => 
  array (
    0 => 'A_1',
    1 => 'A_2',
    2 => 'A_3',
    3 => 'A_4',
    4 => 'B_1',
    5 => 'B_2',
    6 => 'B_3',
    7 => 'C_1',
  ),
)

将值映射到php数组中的一个键

4 个答案: