将文本拆分为句子

本文介绍了将文本拆分为句子的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

如何将文本分成句子数组?

How can I split a text into an array of sentences?

示例文字:

应输出:

0 => Fry me a Beaver.
1 => Fry me a Beaver!
2 => Fry me a Beaver?
3 => Fry me Beaver no. 4?!
4 => Fry me many Beavers...
5 => End

我尝试了一些通过搜索在SO上找到的解决方案，但是它们都失败了，尤其是在第4句话时.

I tried some solutions that I've found on SO through search, but they all fail, especially at the 4th sentence.

/(?<=[!?.])./

/\.|\?|!/

/((?<=[a-z0-9)][.?!])|(?<=[a-z0-9][.?!]\"))(\s|\r\n)(?=\"?[A-Z])/

/(?<=[.!?]|[.!?][\'"])\s+/    // <- closest one

推荐答案

由于您想拆分"句子，所以为什么要匹配它们?

Since you want to "split" sentences why are you trying to match them ?

在这种情况下，我们使用 preg_split().

For this case let's use preg_split().

代码:

$str = 'Fry me a Beaver. Fry me a Beaver! Fry me a Beaver? Fry me Beaver no. 4?! Fry me many Beavers... End';
$sentences = preg_split('/(?<=[.?!])\s+(?=[a-z])/i', $str);
print_r($sentences);

输出:

Array
(
    [0] => Fry me a Beaver.
    [1] => Fry me a Beaver!
    [2] => Fry me a Beaver?
    [3] => Fry me Beaver no. 4?!
    [4] => Fry me many Beavers...
    [5] => End
)

说明:

简单地说，我们是按分组空间 \ s + 进行拆分，然后做两件事:

Well to put it simply we are spliting by grouped space(s) \s+ and doing two things:

(?< = [.?！])肯定在声明之后，基本上我们在空间后面搜索是否有点或问号或感叹号.

(?<=[.?!]) Positive look behind assertion, basically we search if there is a point or question mark or exclamation mark behind the space.

(?= [az])肯定的前瞻性断言，搜索空格后是否有字母，这是解决no. 4问题的一种方法.

(?=[a-z]) Positive look ahead assertion, searching if there is a letter after the space, this is kind of a workaround for the no. 4 problem.

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Assertion