dqq46733 2016-04-05 15:15
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为什么计算一个空字符串返回1？

I realise strlen is the correct function to use, I'm just curious as to why this happens.

How come if PHP in I do echo count("");, it returns the value 1?

See example

I'd have expected it to return 0, as opposed to 1.

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  • doumei9589 2016-04-05 15:15
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    count is counting how many element there are. Here you got a string, so one element.

    Please read the doc :

    Returns the number of elements in array_or_countable. If the parameter is not an array or not an object with implemented Countable interface, 1 will be returned. There is one exception, if array_or_countable is NULL, 0 will be returned.

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