parse_brackets.php

parse_brackets.php

<?php


  function parse() {
    $special = [
      '[' => ']',
      '{' => '}',
      '(' => ')'
    ];
    $string  = str_split('(())');

    $opening = 0;

    foreach ($string as $character) {
      if (in_array($character, array_keys($special))) {
        $opening++;
      }
      if (in_array($character, $special)) {
        $opening--;
      }
    }

    return ($opening == 0);
  }