查找数组子键中是否存在键? [英] Find a key exists in the sub keys of an array?
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问题描述
如何检查数组的子键中是否存在键?如果找到了该项目的键,则返回该项目?
How can I check if a key exists in the sub keys of an array? And if that key of the item is found then return that item?
例如,我有这个数组,
Array
(
[0] => Array
(
[a] => Array
(
[quantity_request] => 1
[time_created] => 1339688613
[variant] => Array
(
)
)
)
[1] => Array
(
[b] => Array
(
[quantity_request] => 1
[time_created] => 1339688631
[variant] => Array
(
)
)
)
[2] => Array
(
[c] => Array
(
[quantity_request] => 1
[time_created] => 1339688959
[variant] => Array
(
)
)
)
)
我想找到键'b'并返回它下面的所有内容,就像我要的那样,
I want to find key 'b' and return everything under it, like this is what I am after,
[b] => Array
(
[quantity_request] => 1
[time_created] => 1339688631
[variant] => Array
(
)
)
我尝试了一下,但没有任何回报,
I try with this, but nothing returns,
if (array_key_exists('b', $this->content)) {
echo "The 'b' element is in the array";
}
有什么想法吗?
推荐答案
function get_letter($letter){
foreach($this->content as $v){
if(array_key_exists($letter, $v) {
return $v[$letter];
}
}
return false;
}
$array = get_letter('a');
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