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  1. <?php
  2.  
  3. $string = "tell me about cats";
  4. preg_match("~\b(tell me about|you know(?: of| about)?|what do you think(?: of| about)?|(?:what|who) is|(?:whats|whos)) ((?:[a-z]+ ?){1,2})$~", $string, $match);
  5. print_r($match);
  6. ?>
Success #stdin #stdout 0.02s 52472KB
comments (?)
stdin 
Standard input is empty
stdout 
Array
(
    [0] => tell me about cats
    [1] => tell me about
    [2] => cats
)
https://ideone.com/v36Ual
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
public

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