PHP：正则表达式在大括号之间提取任何东西

Question

I would like to replace anything between {{ }} with it's PHP date() equivalent. So, for instance:

$path = '/some/path/{{m.d.Y}}.txt'

Would be:

$path = '/some/path/02.25.2018.txt'

How could I do this, assuming I need to use a regular expression?

Answer 1

You could use preg_replace_callback() :

$path = '/some/path/{{m.d.Y}}.txt' ;
$path = preg_replace_callback('~({{[\w.]+}})~', function($matches) {
    return date(trim($matches[0],'{}'));
}, $path);

echo $path ; // /some/path/02.25.2018.txt