ereg() deprecated so have to rewrite to preg_match()

[lsolesen]

A while back I used ereg() in some of my functions, but from php 5.3 ereg() is deprecated, so I need to rewrite them to preg_match(). However, I am not to good with regular expressions in preg_match()-style. Hoping for your help:

ereg("^[a-z0-9]+$", $name);

// I think I rewrote it correctly to

preg_match("/^[a-z0-9]+$/", $name);

// and I guess the following should just be done in the same manner

ereg("^[A-Z][a-z]{2}$", $iso_code)

ereg('^[0-9]{2}-[0-9]{2}-[0-9]{4}$', $duration)

ereg('^([0-9]{1,2}) month$', $duration, $params) 

A more complicated story - where I have no clue where to start when using preg_match():

    // @todo this should be rewrote to preg_match

    // function converts a date to iso-db-format

    function convert2db($default_year = "")

    {

        $d = "([0-3]?[0-9])";

        $m = "([0-1]?[0-9])";

        $y = "([0-9][0-9][0-9][0-9]|[0-9]?[0-9])";

        $s = "(-|\.|/| )";



        if ($default_year == "") {

            $default_year = date("Y");

        }



        if (ereg("/^".$d.$s.$m.$s.$y."$/", $this->date, $parts)) {

            // true

        } elseif (ereg("/^".$d.$s.$m."$/", $this->date, $parts)) {

            $parts[5] = $default_year;

            // true

        } else {

            return false;

        }



        $this->date = $parts[5]."-".$parts[3]."-".$parts[1];

        return true;

    } 

Thanks in advance for your help.