PHP converts full-width numbers to half-width numbers

//Convert full-width numbers to half-width numbers
function GetAlabNum($fnum){
$nums = array("0","1","2","３","４" ,"５","６","７","８","９");
//OSPHP.com.CN
$fnums = "0123456789";
 for($i=0;$i<= 9;$i++) $fnum = str_replace($nums[$i],$fnums[$i],$fnum); //OsPHP.COM.CN
$fnum = ereg_replace("[^0-9.]| ^0{1,}","",$fnum);
 if($fnum=="") $fnum=0;
 return $fnum;
}
?>

PHP