Question

我正在寻找做到这一点的最好方法......是否存在一些方便的正则表达式？或者我应该以某种方式逐段播放它？

好的，我有这样一句话：

"The rooms rooms and rooms again were great, the food was not but the beds were extremely comfortable."

我有一系列项目（分界符）：

 array('food','room','bed');

我想以某种方式神奇地获取这些单词之间的句子部分...就像将它分开（从一个分隔符到另一个分隔符），如果它是可以理解的......

第一部分：

"The"

第二部分（直到距离数组最近的项目（分隔符）：

"rooms "

第三部分：

"rooms and "

第四部分：

"rooms again were great, the"

第五部分：

"food was not but the ".

第四部分：

"beds were extremely comfortable."

基本上将句子从一个关键词重复分配到另一个关键词。

分界点的意思是将句子分开......所以只需匹配它......如果在句子中有一个单词“rooms”，它就会与分隔符“room”相匹配。复数并不重要，重点是根据分界符（数组中的项目）将句子拆分为多个部分。

请问好吗？

Answer 1

可以使用lookahead分割：

$pattern = '/(?=room|food|bed)/i';

$str = "The rooms rooms and rooms again were great, the food was not but the beds were extremely comfortable.";

print_r(preg_split($pattern, $str));

输出（test @ eval.in）

Array
(
    [0] => The 
    [1] => rooms 
    [2] => rooms and 
    [3] => rooms again were great, the 
    [4] => food was not but the 
    [5] => beds were extremely comfortable.
)

已使用i (PCRE_CASELESS) modifier。可能希望将\b word-boundaries添加到某些字词中。

另请参阅：test at regex101，regex faq

PHP通过值数组将句子分割成节

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