PHP程序从数组中查找丢失的元素
'array_diff'函数可用于查找数组中缺少的元素。
示例
<?php
function absent($my_list)
{
$my_array = range(min($my_list), max($my_list));
return array_diff($my_array, $my_list);
}
echo "Elements missing from first array are ";
print_r(absent(array(45, 48, 51, 52, 53, 56)));
echo "Elements missing from second array are ";
print_r(absent(array(99, 101, 104, 105)));
?>输出结果
Elements missing from first array are Array ( [1] => 46 [2] => 47 [4] => 49 [5] => 50 [9] => 54 [10] => 55 ) Elements missing from second array are Array ( [1] => 100 [3] => 102 [4] => 103 )
定义了一个名为“不存在”的函数，该函数检查以查看最小数量和最大数量并生成该范围内的数组。然后，该函数使用'array_diff'函数返回该数组与原始数组之间的差，该差给出数组中缺少的元素。