检查数组是否唯一(但0可以重复) - Check if an array is unique (but 0 can repeat)

Check if an array is unique (but 0 can repeat)

本文关键字：数组是否唯一检查 | 更新日期: 2023-09-27

我有以下数组:

$check = array(
  $_POST["list1"],
  $_POST["list2"],
  $_POST["list3"],
  $_POST["list4"],
  $_POST["list5"],
  $_POST["list6"],
  $_POST["list7"],
  $_POST["list8"],
  $_POST["list9"],
  $_POST["list10"],
);

我想检查这个数组中所有的值是否唯一(0是唯一可以重复的值)。所以:1, 2, 5, 7, 7, 0, 0, 4, 2, 1 ->错误1,2,3,0,0,0,0,7,8,9 -> ok任何想法?

PHP5.3

$result = array_reduce ($check, function ($valid, $value) {
  static $found = array();
  if (!$valid || (($value != 0) && in_array($value, $found))) {
    return false;
  } else {
    $found[] = $value;
    return true;
  }
}, true);

或

$counted = array_count_values($check);
unset($counted[0], $counted['0']); // Ignore "0" (dont know, if its an integer or string)
$valid = (count($counted) == array_sum($counted));

<?php
    function isValidArray($array)
    {
        $found = array();
        foreach($array as $item)
        {
            $item = (int) $item;
            if($item == 0)
                continue;
            if(in_array($item, $found))
                return false;
            array_push($found, $item);
        }
        return true;
    }
?>