有人可以帮我解决我的问题吗?
我想在多维数组中使用var_dump特定键。 Array_keys,我无法弄清楚如何在多维数组中使用var_dump特定的或特定的键。
示例:
$array = array (
0 =>
array (
'id' => '9',
'gallery_id' => '2',
'picture' => '56475832.jpg'
),
1 =>
array (
'id' => '8',
'gallery_id' => '2',
'picture' => '20083622.jpg'
),
2 =>
array (
'id' => '7',
'gallery_id' => '2',
'picture' => '89001465.jpg'
),
3 =>
array (
'id' => '6',
'gallery_id' => '2',
'picture' => '47360232.jpg'
),
4 =>
array (
'id' => '5',
'gallery_id' => '2',
'picture' => '4876713.jpg'
),
5 =>
array (
'id' => '4',
'gallery_id' => '2',
'picture' => '5447392.jpg'
),
6 =>
array (
'id' => '3',
'gallery_id' => '2',
'picture' => '95117187.jpg'
)
);
如果我只想访问多维数组的特定键“id”怎么办?
array_keys是否有效?
还有什么可以胜任这项工作?因为我现在卡住了。
答案 0 :(得分:0)
您可以使用foreach循环来访问ID。像这样:
foreach($array as $key => $arrays){
echo $array[$key]['id'];
echo '<br />';
}
答案 1 :(得分:0)
试试这个。我编写了一个简单的函数,它通过给定的索引名称获取值数组:
<?php
$array = array (
0 =>
array (
'id' => '9',
'gallery_id' => '2',
'picture' => '56475832.jpg'
),
1 =>
array (
'id' => '8',
'gallery_id' => '2',
'picture' => '20083622.jpg'
),
2 =>
array (
'id' => '7',
'gallery_id' => '2',
'picture' => '89001465.jpg'
),
3 =>
array (
'id' => '6',
'gallery_id' => '2',
'picture' => '47360232.jpg'
),
4 =>
array (
'id' => '5',
'gallery_id' => '2',
'picture' => '4876713.jpg'
),
5 =>
array (
'id' => '4',
'gallery_id' => '2',
'picture' => '5447392.jpg'
),
6 =>
array (
'id' => '3',
'gallery_id' => '2',
'picture' => '95117187.jpg'
)
);
function dumpValuesByIndexName($array, $indexName)
{
$tempArray = array();
foreach($array as $key => $value)
{
if(isset($value[$indexName]))
$tempArray[$key] = $value[$indexName];
}
return $tempArray;
}
$result = dumpValuesByIndexName($array, 'id');
var_dump($result);
结果是:
array(7) {
[0]=>
string(1) "9"
[1]=>
string(1) "8"
[2]=>
string(1) "7"
[3]=>
string(1) "6"
[4]=>
string(1) "5"
[5]=>
string(1) "4"
[6]=>
string(1) "3"
}
以下是工作示例:CLICK!
答案 2 :(得分:0)