新手:PHP中怎么样把全角转换成半角!

Question

搜索一下"全角 半角 php"。你会得到答案的。

Answer 1

http://bbs.chinaunix.net/viewthread.php?tid=680534

Answer 2

比如这个函数:
  //----------------------------
  //把全角数字或英文单词转为半角
  //---------------------------
  function GetAlabNum($fnum)
  {
  $nums = array("０","１","２","３","４","５","６",
  "７","８","９","＋","－","％","．",
  "ａ","ｂ","ｃ","ｄ","ｅ","ｆ","ｇ","ｈ","ｉ","ｊ","ｋ","ｌ","ｍ",
  "ｎ","ｏ","ｐ","ｑ","ｒ","ｓ ","ｔ","ｕ","ｖ","ｗ","ｘ","ｙ","ｚ",
  "Ａ","Ｂ","Ｃ","Ｄ","Ｅ","Ｆ","Ｇ","Ｈ","Ｉ","Ｊ","Ｋ","Ｌ","Ｍ",
  "Ｎ","Ｏ","Ｐ","Ｑ","Ｒ","Ｓ","Ｔ","Ｕ","Ｖ","Ｗ","Ｘ","Ｙ","Ｚ");
  $fnums = "0123456789+-%.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
  for($i=0;$i<count($nums);$i++){
   if($nums[$i]==$fnum) return $fnums[$i];
  }
  return $fnum;
  }