[PHP] pobierz, plaintext 
$string = 'April  15, 2003';
$pattern = '/([0-9]){4}/';
$replacement = 'rok';
 
preg_replace ( $pattern ,  $replacement ,  $string);
echo $string;
[PHP] pobierz, plaintext 

[PHP] pobierz, plaintext 
$string = 'April  15, 2003';
$pattern = '#[0-9]{4}#';
$replacement = 'rok';
 
echo preg_replace( $pattern ,  $replacement ,  $string);
[PHP] pobierz, plaintext