正则表达式的变量int php

Question

I get some strings like phs(2.1.2):someinfo and I want to receive a version (2.1.2) in variable with hel of php and it's regexp abilities. I get it like:

        if (preg_match('/phs\((.*)\):/', $line))
        {
            echo $line.'<br>';
        }

It's ok, but now I want to get stored variable of regexp. I've found that I can get it as \1, but when I try it it's white screen in browser, so it doesn't work. Is it possible to get variables from regexp? Or there is better sollution?

Answer 1

Use the optional parameter of preg_match, array &$matches .
Something like this -

$line = "phs(2.1.2):someinfo";
if (preg_match('/phs\((.*)\):/', $line, $matches))
{
    $version = $matches[1];
    echo $version.'<br>';
}
//OUTPUT - 2.1.2