<?php
$content = file_get_contents('./Contacts_backup.udx');
preg_match_all('/<vCardInfo>.*<\/vCardInfo>/imsU', $content, $items);
$pattern = 'BEGIN:VCARD
VERSION:2.1
N;CHARSET=UTF-8;ENCODING=QUOTED-PRINTABLE:{%NAME%}.
TEL;CELL:{%PHONE%}
END:VCARD
';
foreach($items[0] as $key => $item){
    preg_match('/<N>(.*)<\/N>/imsU', $item, $name);
    preg_match('/<TEL>(.*)<\/TEL>/imsU', $item, $phone);
    $output = $pattern;
    $output = str_replace('{%NAME%}', !empty($name[1]) ? $name[1] : '', $output);
    $output = str_replace('{%PHONE%}', !empty($phone[1]) ? $phone[1] : '', $output);
    $fd = fopen('./output/vcard'.$key.'.vcf','w+');
    fwrite($fd, $output);
    fclose($fd);
}