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<?php
$treeData = [
[11, 12, 13, 14], [
21, 22, [
231, 232, 234, 235, [
2361, 2362, 2363
]
]
],
[31, 32, [
331, 332, 333
]
]
];
function depth($tree)
{
$maxDepth = 0;
$depth = -1;
$tree = str_split(preg_replace('/[^\{\}]+/', '', serialize($tree)));
foreach ($tree as $char) {
$char == '{' ? $depth++ : $depth--;
$maxDepth = max($maxDepth, $depth);
}
return $maxDepth;
}
echo depth($treeData);
Php
INFO