如果缺少密钥，PHP Array将删除项目

I have the following array format:

Array
(
    [0] => stdClass Object
        (
            [tid] => 3
            [children] => Array ()
        )
    [1] => stdClass Object
        (
            [tid] => 15
        )
    [2] => stdClass Object
        (
            [tid] => 12
            [children] => Array ()
        )
    [3] => stdClass Object
        (
            [tid] => 9
            [children] => Array ()
        )
)

I would like to remove items that do not have [children] and am having some difficulty doing so.

Help is appreciated, thank you.

Can you give this a shot and let me know what happens?

$myArray = array_filter($myArray, "hasChildren");

function hasChildren($node) {
    if (isset($node->children)) return true;
    return false;
}

Try this, where $array is the array you want to process

foreach($array as $key => $value)
{
    if(!isset($value['children'])
        unset($array[$key]);
}

This will remove all items in your array where children is not set or is null. Since in your example you set children to empty arrays, you will need to use isset() and not empty().