PHP按值数组将句子拆分为部分

Question

我正在寻找执行此操作的最佳方法...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节循环播放它？

好吧，我有这么一句话：

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

我有一个项目数组（分隔符）：

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

如果可以理解的话，我想以某种方式神奇地获得这些单词之间的句子部分......就像将它分割（从一个分隔符到另一个分隔符）......

第一节：

"The"

第二部分（直到数组中最近的项目（分隔符）：

"rooms "

第三部分：

"rooms and "

第四节：

"rooms again were great, the"

还有第五部分：

"food was not but the ".

第四节：

"beds were extremely comfortable."

基本上将句子从一个关键字重复拆分到另一个关键字。

分隔符的意义在于分割句子......所以只需匹配它......如果句子中有一个单词“rooms”，它匹配分隔符“room”。复数不重要，关键是根据分隔符（数组中的项目）将句子分成多个部分。

有什么想法吗？

Answer 1

可以使用lookahead进行拆分：

$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.
)

使用i (PCRE_CASELESS)modifier。可能需要在某些单词中添加\b word-boundaries。

另见：test at regex101、regex faq