Untitled
unknown
php
3 years ago
990 B
18
Indexable
<?php $valid = '2*([23])'; $invalid = '3+{21()'; function isStrValid(string $str): bool { $len = strlen($str); $stack = []; for ($i = 0; $i < $len; $i++) { switch ($str[$i]) { case '(': $stack[] = 0; break; case ')': if (0 !== array_pop($stack)) { return false; } break; case '[': $stack[] = 1; break; case ']': if (1 !== array_pop($stack)) { return false; } break; case '{': $stack[] = 2; break; case '}': if (2 !== array_pop($stack)) { return false; } break; } } return empty($stack); } var_dump(isStrValid($valid), isStrValid($invalid));
Editor is loading...