在php中计算逗号分隔的值，如何？ [英] Counting comma separated values in php, how to?

问题描述

我有一个变量保持值用逗号（Implode）分隔，我想获得该变量的值的总数，但count（）只是返回1.

I have a variable holding values separated by a comma (Implode), I'm trying to get the total count of the values in that variable however, count() is just returning 1.

我已经尝试将逗号分隔的值转换为一个正确格式的数组，仍然吐出1。

I've tried converting the comma separated values to a properly formatted array which still spits out1.

因此，可以看到sarray会话等于value1，value2，value3的快速代码段：

So heres the quick snippet where the sarray session equals to value1,value2,value3:

$schools = $_SESSION['sarray'];
$result = count($schools);

任何帮助将不胜感激。

Any help would be appreciated.

推荐答案

您需要 explode $ schools 转换为实际数组：

You need to explode $schools into an actual array:

$schools = $_SESSION['sarray'];
$schools_array = explode(",", $schools);
$result = count($schools_array);

如果你只需要计数，并且100％确定它是一个干净的逗号分隔的列表，还可以使用 substr_count（），这可能会稍微快一点，更重要的是，对于非常大的数据集，内存更容易：

if you just need the count, and are 100% sure it's a clean comma separated list, you could also use substr_count() which may be marginally faster and, more importantly, easier on memory with very large sets of data:

$result = substr_count( $_SESSION['sarray'], ",") +1; 
 // add 1 if list is always a,b,c;

这篇关于在php中计算逗号分隔的值，如何？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！