如何检查多维数组中是否存在特定的数组键
if i'm accessing an index like that
$var = $final_Length_Array[1][0]['id'];
how to check whether the "id" key index exist in the array or not.
i tried to use function array_key_exists but it seems to be working only on one dimension array.
i tried it like if(array_key_exists('id',$final_Length_Array)){ but it didn't work
i also tried isset to check whether there is a result or not but it didn't work also if(isset($final_Length_Array[1][0]['id'])){
any help i'll be appreciate it
如果我正在访问类似的索引 p>
$ var = $ final_Length_Array [1] [0] ['id'];
code> pre>
如何检查数组中是否存在“id”键索引。 p>
我试图使用函数 array_key_exists code>但它似乎只在一个维数组上工作。 p>
我尝试过 比如 if（array_key_exists（'id'，$ final_Length_Array））{ code>但它不起作用 p>
我也尝试过isset检查是否有结果或 不是但它也不起作用 if（isset（$ final_Length_Array [1] [0] ['id']））{ code> p>
任何帮助我' 我会很感激 p>
div>
Super hacky solution:
function array_key_exists_recursive($array, $key) {
return strpos(json_encode($array), "\"" . $key . "\":") !== false;
}
Better solution:
$array = ['a' => ['b' => 'c']];
function array_key_exists_recursive($key, $array) {
if (array_key_exists($key, $array)) {
return true;
}
foreach($array as $k => $value) {
if (is_array($value) && array_key_exists_recursive($key, $value)) {
return true;
}
}
return false;
}
var_dump(array_key_exists_recursive('b', $array));