dongliuzhuan1219 2017-10-12 02:38
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使用preg_match组合正则表达式

I currently have 2 regular expressions to match. I need to match either of them

I am currently using this code:

$string = '000.400.101';

$regex1 = "^(000\.000\.|000\.100\.1|000\.[36])";
$regex2 = "^(000\.400\.0|000\.400\.100)";

$result = (preg_match('/'.$regex1.'/', $string) ||
           preg_match('/'.$regex2.'/', $string)) ? 1 : 0 ;

I would like to shorten this and clean it up a little. Would the below be equivalent:

$result = (preg_match('/'.$regex1.'|'.$regex2.'/', $string)) ? 1 : 0 ;
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  • dpa55065 2017-10-12 02:46
    关注

    You can try consolidating everything into the following single regex:

    000\.(?:[36]|000\.|100\.1|400\.(?:0|100))
    

    Demo

    $result = preg_match('/000\.(?:[36]|000\.|100\.1|400\.(?:0|100))/', $string) ? 1 : 0;
    

    And here is a link to a demo in PHP showing that the code works.

    By the way, if you have the general need to regex match IP addresses, I think this general problem should be very well covered already on Stack Overflow and within PHP, and you should search around for something which might help you.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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