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PHP判断一个字符串是否是回文字符串

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Release： 2016-06-13 10:16:15
Original
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本文章给大家介绍一个实例，用来判断字符串是不是为回文字符串，有需要了解的朋友可参考参考。

 代码如下 复制代码
  function ishuiwen($str){
   $len=strlen($str);
   $l=1;
   $k=intval($len/2)+1;
     for($j=0;$j        if (substr($str,$j,1)!=substr($str,$len-$j-1,1))
          {
   $l=0;
   break;
     }
   
  
  }
  if ($l==1)
  {
  return 1;
  }
  else
  {
  return -1;
   }
  }
 
  $str=12321;
  echo ishuiwen($str);
?>
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