//把全角数字转为半角数字 function GetAlabNum($fnum){     $nums = array("０","１","２","３","４","５","６","７","８","９","．","－","＋","：");     $fnums = array("0","1",  "2","3",  "4","5",  "6", "7","8",  "9",".",  "-", "+",":");     $fnlen = count($fnums);     for($i=0;$i<$fnlen;$i++) $fnum = str_replace($nums[$i],$fnums[$i],$fnum);     $slen = strlen($fnum);     $oknum = "";     for($i=0;$i<$slen;$i++){         if(ord($fnum[$i]) > 0x80) $i++;         else $oknum .= $fnum[$i];     }     if($oknum=="") $oknum=0;     return $oknum; }