<?php
function is_cyclic(&$array) {
$isRecursive = false;
set_error_handler(function ($errno, $errstr) use (&$isRecursive) {
$isRecursive = $errno === E_WARNING && mb_stripos($errstr, 'recursion');
});
try {
count($array, COUNT_RECURSIVE);
} finally {
restore_error_handler();
}
return $isRecursive;
}
$array = [1, [2, 3]];
$array[1][1] = &$array;
var_dump(is_cyclic($array));
- Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13
- bool(true)
preferences:
76.16 ms | 406 KiB | 5 Q