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php统计数组元素个数的方法,php统计数组个数

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Release: 2016-06-13 08:58:50
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php统计数组元素个数的方法,php统计数组个数

count():对数组中的元素个数进行统计;

sizeof():和count()具有同样的用途,这两个函数都可以返回数组元素个数.可以得到一个常规标量变量中的元素个数,如果传递给这个函数的数组是一个空数组,或者是一个没有经过设定的变量,返回的数组元素个数就是0;

array_count_value():统计每个特定的值在数组$array中出现过的次数;

如:

  $array=array(4,5,1,2,3,1,2,1);
  $ac=array_count_value($array);

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将创建一个名为$ac数组,该数组包括:

            关键字    值

             4     1

           5     1

           1     3

           2     2

           3     1

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发一个网友的思路,也非常不错

$arr = array(
      '1011,1003,1008,1001,1000,1004,1012',
      '1009',
      '1011,1003,1111'
    );
$result = array();
foreach ($arr as $str) {
  $str_arr = explode(',', $str);
  foreach ($str_arr as $v) {
    $result[$v] = isset($result[$v]) ? $result[$v] : 0;
    $result[$v] = $result[$v] + 1;
  }
}
print_r($result);
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以上所述就是本文的全部内容了,希望大家能够喜欢。

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