無限極分類

function getCategorySelect($tablename,$select_id=0,$id = 0,$level = 0){
	global $db;
	$category_arr = $db->getList (get_sql( "SELECT * FROM {pre}$tablename WHERE fid = " . $id . " order by rank" ));
	for($lev = 0; $lev < $level * 2 - 1; $lev ++) {
		$level_nbsp .= " ";
	}
	if ($level++)
		$level_nbsp .= "┝";
	foreach ( $category_arr as $category ) {
		$id = $category ['id'];
		$fid = $category ['fid'];
		$name = $category ['name'];
		$selected = $select_id==$id?'selected':'';
		echo "<option value=\"".$id."\" ".$selected.">".$level_nbsp . " " . $name."</option>\n";
		getCategorySelect ($tablename,$select_id, $id, $level );
	}
}