确定数组中有多少连续字段为空

问题描述：

I have an array with variables like:
$shippingtimearr = array("", "1630", "1530", "1530", "1530", "", "");

Each field in this array represents a weekday.
I need to determine how many consecutive fields are empty depending on the day ("starting field").

For example:
If the start is $shippingtimearr[5] it should return 3 since next "Monday" ($shippingtimearr[0]) is NULL.
If the start is an array value that is not NULL, it should return 0;

I tried creating a "for" loop like this:

for( $i = 2; $shippingtimearr[$i] = 0; $i++ ) {
            $counter++;
         }

But it didn't work and obviously, this would not account for the fact that a "week" should be looped again to see if the first days next week are "NULL".

我有一个包含变量的数组：
$ shippingtimearr = array（“”，“1630 “，”1530“，”1530“，”1530“，”“，”“”; code> 此数组中的每个字段代表一个工作日。我需要确定有多少连续字段为空，具体取决于当天（“起始字段”）。例如：如果开始是 $ shippingtimearr [5] code>，它应该返回 3 code>，因为下一个“星期一”（ $ shippingtimearr [0] code>）是 NULL code>。如果start是一个不是 NULL code>的数组值，它应该返回 0 code >; p>

我尝试创建一个“for”循环： p>


  for（$ i = 2; $ shippingtimearr [$ i  ] = 0; $ i ++）{
 $ counter ++; 
} 
  code>  pre> 
 
 但它没有用，显然，这不会说明这一事实 应该再次循环“周”以查看下周的第一天是否为“ NULL  code>”。 p> 
  div>

答

Since nobody seemed to understand exactly what I was looking for, I will post a solution I came up with myself using a "while" loop:

$counter = 0;
$shippingtimearr = ["", "1630", "1530", "1530", "1530", "", ""];
$start = 3;

while ($shippingtimearr[$start++] == NULL) {
    ++$counter;
    if ($start > 6) $start = 0;
}

答

$shippingtimearr = array("", "1630", "1530", "1530", "1530", "", "");
$contains_empty = count($shippingtimearr) - count(array_filter($shippingtimearr));

答

May be you are looking for some simpler answer like

<?php
$shippingtimearr = array("", "1630", "1530", "1530", "1530", "", "");
$counter = 0;
for($i=0;$i<count($shippingtimearr);$i++){
    if($shippingtimearr[$i]=="")
        $counter++;
}
echo $counter;
?>

答

You can use array_count_values(), check the live demo

<?php

$shippingtimearr = array("", "1630", "1530", "1530", "1530", "", "");
print_r(array_count_values($shippingtimearr)['']);

确定数组中有多少连续字段为空

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