如何在阵列中找到最常见的重复项？

Question

在getMostFrequentlyOccurringItem()下面创建函数的最佳方法是什么？

//should return "paragraph"
echo getMostFrequentlyOccurringItem(array('line', 'paragraph', 'paragraph'));

//should return "line"
echo getMostFrequentlyOccurringItem(array('wholeNumber', 'line', 'line', 'line'));

//should return null
echo getMostFrequentlyOccurringItem(array('wholeNumber', 'wholeNumber', 'paragraph', 'paragraph'));

//should return "wholeNumber"
echo getMostFrequentlyOccurringItem(array('wholeNumber', '', '', ''));

function getMostFrequentlyOccurringItem($items) {
    //...
}

回答:

谢谢亚当,这是我完成的解决方案:http: //tanguay.info/web/index.php？pt = codeExamples&id = 396

Answer 1

首先array_count_values(),按照您的喜好按摩输出.

php> =array_count_values(array('wholeNumber', 'line', 'line', 'line'))
array(
  "wholeNumber" => 1,
  "line" => 3,
)

arsort($counts, SORT_NUMERIC)将array_count_values()首先按频率对输出进行排序.