<?php
$string = '洋光台４丁目';
$string = mb_convert_kana($string, 'n');
$pattern = array("/1/", "/2/", "/3/", "/4/", "/5/", "/6/", "/7/", "/8/", "/9/", "/0/");
$replace=array('一', '二', '三', '四', '五', '六', '七', '八', '九', '０');
$result=preg_replace($pattern, $replace, $string);
//echo $result;
echo phpinfo();