>>498
$lines = new ArrayIterator(file('file.txt'));
for ($lines->rewind(); $lines->valid(); $lines->next()) {
mb_ereg("[ａ-ｚＡ-Ｚ][ａ-ｚＡ-Ｚ０-９]*", $lines->current(), $matches);
list($str) = $matches;
echo ($str ? $str."<br />\n" : '');
}