Nov 22, 2009

The Absolute Bare Minimum Every Programmer Should Know About Regular Expressions

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The Absolute Bare Minimum Every Programmer Should Know About Regular Expressions

dserban
Aug 16 2007, 08:46 PM
Well, the title says it all and I really don't have anything to add to that, except to say that this is a really, really powerful technology that is very pervasive in many programming as well as scripting languages and as well in mainstream database products.

I really recommend you put in the time and effort to learn regular expressions, they are power tools that are going to open for you a whole new world of text processing possibilities.

Link:
http://immike.net/blog/2007/04/06/the-abso...ar-expressions/

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develCuy
Aug 16 2007, 10:59 PM
regexp in PHP Arrays:

Clear blanks:
CODE
$array = preg_grep('/[^$]/', $array);


Patterns for zip codes
CODE
$zip_code = str_replace(' ','','ZIP CODE');

    $pattern = array(
      array(
        '/^[[:alnum:]]{6,6}+$/',
        '/[[:alpha:]]/',
        '/[[:digit:]]/'
      ),
      array(
        '/^(\d){5,5}+$/'
      )
    );
        $is_zip_code = true
    for($_j = 0; $_j < count($pattern[$_i]); $_j++){
      $is_zip_code = ($is_zip_code and preg_match($pattern[$_i][$_j],$zip_code));
    }


Regexp have power to resume your code in rules, then you are able to change the pattern easily.
There are many tools to create regexp patterns.

Blessings!

 

 

 


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