Preview::filter PHP Method

Preview Class Documentation Show file Open project: bcosca/fatfree

filter() public method

Register or get (a specific one or all) token filters
public filter ( string $key = NULL, string | closure $func = NULL ) : array | closure | string
$key string
$func string | closure
return array | closure | string 
    function filter($key = NULL, $func = NULL)
    {
        if (!$key) {
            return array_keys($this->filter);
        }
        if (!$func) {
            return $this->filter[$key];
        }
        $this->filter[$key] = $func;
    }
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