<!-- Collection of code snippets by Arne Vajhøj -->
<!-- posted to eksperten.dk, usenet and other places (2002-now) -->
<?php
interface PatternModifier {
    public function replace($pattern);
}

class RegexRemove implements PatternModifier {
    private $stripchars;
    public function __construct($stripchars) {
        $this->stripchars = $stripchars;
    }
    public function replace($pattern) {
        return  preg_replace('/[' . $this->stripchars . ']/', '', $pattern);
    }
}

class StartEndTrim implements PatternModifier {
    private $skipstart;
    private $skipend;
    public function __construct($skipstart, $skipend) {
        $this->skipstart = $skipstart;
        $this->skipend = $skipend;
    }
    public function replace($pattern) {
        return substr($pattern, $this->skipstart, -$this->skipend);
    }
}

class Combined implements PatternModifier {
    private $modifiers;
    public function __construct($modifiers) {
        $this->modifiers = $modifiers;
    }
    public function replace($pattern) {
        $result = $pattern;
        foreach($this->modifiers as $m) {
            $result = $m->replace($result);
        }
        return $result;
    }
}

function test($locale, $t, $format, $pattern_modifier) {
    echo "Locale: $locale\r\n";
    $idf = new IntlDateFormatter($locale, $format, IntlDateFormatter::NONE);
    echo $idf->format($t) . "\r\n";
    $pattern = $idf->getPattern();
    $pattern = $pattern_modifier->replace($pattern);
    $idf->setPattern($pattern);
    echo $idf->format($t) . "\r\n";
}

$t = time();
foreach (['da_DK', 'en_US', 'fr_FR', 'de_DE'] as $locale) {
    test($locale, $t, IntlDateFormatter::LONG, new RegexRemove('y,'));
    test($locale, $t, IntlDateFormatter::SHORT, new Combined([new RegexRemove('y'), new StartEndTrim(0, 1)]));
}
?>