PHP - preg_match() word after other word

问题

I have a text like this one: The cat was born on 1980 and lives ...

So i want to get the cat's age with regex (the text could have more than 1 occurrence of a number with 4 digits).

I'm trying this preg_match('/born on [0-9]{4}/', $text, $matches) but the result is: array('born on 1980'). I want to ignore everything before a year.

Demo: http://www.phpliveregex.com/p/aYl

回答1:

Group the value you want then it will be the first item of the array.

$text = 'The cat was born on 1980 and lives ...';
preg_match('/born on ([0-9]{4})/', $text, $matches);
echo $matches[1];

Output:

1980

来源：https://stackoverflow.com/questions/29907526/php-preg-match-word-after-other-word