如何使用正則表達式從文本中獲取日期

Question

我有一個文本Summary for rxd7865 November 13, 2012 to November 13, 2012。

我想從上面的文本只提取日期字符串像November 13, 2012。

我如何在PHP中使用正則表達式來做到這一點？

Answer 1

正則表達式：

preg_match('/(?<the_date>(January|February|March) [0-9]{2}, 20[0-9]{2})/', $string, $matches); 
echo $matches[the_date]; 

的解釋：

() // are called capture groups or matches 
(?<name>) // are named capture groups or named matches 
| // separator between a list of alternative matches 
[] // is a character class 
[0-9] // is a character class that allows only characters from 0 to 9 
{} // is a repetition specifier 
[]{2} // allows the character class to repeat twice 

Answer 2

隨着preg_match_all，它採用PCRE syntax