Custom var template parser v1

<?php
$re = '/(?<VAR>\$\w+)(?::(?<PAD>\d+)(?:\.(?<DEC>\d+)|)|#(?<DATE>[^\s]+))/m';
$str = 'My name $name

$name:10   $date#Y-m-d_H:i:s  $num:10.2

qua

$date#Y-m-d  asdasd $num:5.0 qwe $var:5

qualquer texto no meio';

echo preg_replace_callback($re, function($m) {
    $out = '';
    $var = $m['VAR'];
    if(isset($m['DATE']))
        $var =
            "date(".
                "'".str_replace('_', ' ', $m['DATE'])."', ".
                "strtotime($var)".
            ")";
    elseif(isset($m['DEC']))
        $var =
            "substr(".
                "str_pad(".
                    "number_format(".
                        "$var,".
                        "{$m['DEC']},".
                        "',',".
                        "'.'".
                    "),".
                    "{$m['PAD']},".
                    "' ',".
                    "STR_PAD_RIGHT".
                ")".
            ")";

    elseif(isset($m['PAD']))
        $var = "substr(str_pad($var, {$m['PAD']}, ' '))";

    return "<?= $var ?>";
}, $str);

// Print the entire match result