php中防止重复提交数据程序代码

<?php
 session_start();
 $_SESSION['num'] = 0;
 if(isset($_POST['action'] && $_POST['action']=='submit')){
  if($_SESSION['num'] == 0){
   echo '<a href="'.$_SERVER['PHP_SELF'].'">'请再次尝试</a>;'
   $_SESSION['num'] = 1;
  }else{
   echo '您已经提交过了，请不要重复提交';
  }
 }
?>

<form id="form1" name="form1" method="post" action="t2.php">
<p>说明
<input type="text" name="titile" />
</p>
<p>
<input type="submit" name="Submit" value="提交" />
</p>
</form>

<?php

setcookie("onlypost", 't');        

//设置cookie，可以带上时间值。像有些论坛防止灌水就可以将你的一些基本信息存放到里面。

?>

<?php

if($_COOKIE['onlypost'] == 't'){

    print_r($_COOKIE);

    //处理提交的内容           如果验证成功则处理

    print "ok";

    setcookie("onlypost", 'f'); //改变cooike值删除也可以了
}
?>

/**
*getConstellation 根据出生生日取得星座
*
*@param String $brithday 用于得到星座的日期 格式为yyyy-mm-dd
*
*@param Array $format 用于返回星座的名称
*
*@return String
*/
function getConstellation($birthday, $format=null)
{
$pattern = ‘/^d{4}-d{1,2}-d{1,2}$/’;
if (!preg_match($pattern, $birthday, $matchs))
{
    return null;
}
$date = explode(‘-’, $birthday);
$year = $date[0];
$month = $date[1];
$day   = $date[2];
if ($month <1 || $month>12 || $day < 1 || $day >31)
{
    return null;
}
//设定星座数组
$constellations = array(
      ‘摩羯座’, ‘水瓶座’, ‘双鱼座’, ‘白羊座’, ‘金牛座’, ‘双子座’,
      ‘巨蟹座’,'狮子座’, ‘处女座’, ‘天秤座’, ‘天蝎座’, ‘射手座’,);
//或 ‍‍$constellations = array(
      ‘Capricorn’, ‘Aquarius’, ‘Pisces’, ‘Aries’, ‘Taurus’, ‘Gemini’,
      ‘Cancer’,'Leo’, ‘Virgo’, ‘Libra’, ‘Scorpio’, ‘Sagittarius’,);
//设定星座结束日期的数组，用于判断
$enddays = array(19, 18, 20, 20, 20, 21, 22, 22, 22, 22, 21, 21,);
//如果参数format被设置，则返回值采用format提供的数组，否则使用默认的数组
if ($format != null)
{
    $values = $format;
}
else
{
    $values = $constellations;
}
//根据月份和日期判断星座
switch ($month)
{
    case 1:
      if ($day <= $enddays[0])
      {
        $constellation = $values[0];
      }
      else
      {
        $constellation = $values[1];
      }
      break;
    case 2:
      if ($day <= $enddays[1])
      {
        $constellation = $values[1];
      }
      else
      {
        $constellation = $values[2];
      }
      break;
    case 3:
      if ($day <= $enddays[2])
      {
        $constellation = $values[2];
      }
      else
      {
        $constellation = $values[3];
      }
      break;
    case 4:
      if ($day <= $enddays[3])
      {
        $constellation = $values[3];
      }
      else
      {
        $constellation = $values[4];
      }
      break;
    case 5:
      if ($day <= $enddays[4])
      {
        $constellation = $values[4];
      }
      else
      {
        $constellation = $values[5];
      }
      break;
    case 6:
      if ($day <= $enddays[5])
      {
        $constellation = $values[5];
      }
      else
      {
        $constellation = $values[6];
      }
      break;
    case 7:
      if ($day <= $enddays[6])
      {
        $constellation = $values[6];
      }
      else
      {
        $constellation = $values[7];
      }
      break;
    case 8:
      if ($day <= $enddays[7])
      {
        $constellation = $values[7];
      }
      else
      {
        $constellation = $values[8];
      }
      break;
    case 9:
      if ($day <= $enddays[8])
      {
        $constellation = $values[8];
      }
      else
      {
        $constellation = $values[9];
      }
      break;
    case 10:
      if ($day <= $enddays[9])
      {
        $constellation = $values[9];
      }
      else
      {
        $constellation = $values[10];
      }
      break;
    case 11:
      if ($day <= $enddays[10])
      {
        $constellation = $values[10];
      }
      else
      {
        $constellation = $values[11];
      }
      break;
    case 12:
      if ($day <= $enddays[11])
      {
        $constellation = $values[11];
      }
      else
      {
        $constellation = $values[0];
      }
      break;
}
return $constellation;
}
js格式的：
根据生日的月份和日期，计算星座的js小函数（最简）
// 根据生日的月份和日期，计算星座。  http://blog.111cn.net/cuixiping/
function getAstro(month,day){
    var s=”魔羯水瓶双鱼牡羊金牛双子巨蟹狮子处女天秤天蝎射手魔羯”;
    var arr=[20,19,21,21,21,22,23,23,23,23,22,22];
    return s.substr(month*2-(day<arr[month-1]?2:0),2);
}
// 取星座, 参数分别是 月份和日期
function getxingzuo(month,day){
//by Go_Rush(阿舜) from http://ashun.cnblogs.com/
var d=new Date(1999,month-1,day,0,0,0);
var arr=[];
arr.push(["魔羯座",new Date(1999, 0, 1,0,0,0)])
arr.push(["水瓶座",new Date(1999, 0,20,0,0,0)])
arr.push(["双鱼座",new Date(1999, 1,19,0,0,0)])
arr.push(["牡羊座",new Date(1999, 2,21,0,0,0)])
arr.push(["金牛座",new Date(1999, 3,21,0,0,0)])
arr.push(["双子座",new Date(1999, 4,21,0,0,0)])
arr.push(["巨蟹座",new Date(1999, 5,22,0,0,0)])
arr.push(["狮子座",new Date(1999, 6,23,0,0,0)])
arr.push(["处女座",new Date(1999, 7,23,0,0,0)])
arr.push(["天秤座",new Date(1999, 8,23,0,0,0)])
arr.push(["天蝎座",new Date(1999, 9,23,0,0,0)])
arr.push(["射手座",new Date(1999,10,22,0,0,0)])
arr.push(["魔羯座",new Date(1999,11,22,0,0,0)])
for(var i=arr.length-1;i>=0;i–){
if (d>=arr[i][1]) return arr[i][0];
}
}
function getxingzuo(month,day){
var s=”魔羯水瓶双鱼牡羊金牛双子巨蟹狮子处女天秤天蝎射手魔羯”;
var arr=[19,50,84,116,148,181,214,246,278,310,341,373,383];
for(var i=0;i<arr.length;i++){
if ((((month-1)<<5)+day) <= arr[i]) return s.substr(i*2,2);
}
return “error”;
}
计算生肖的：
function birthday2BornTag($birthday){
$year = substr($birthday,0,4);
$bornTagarray = array(“猴”, “鸡”, “狗”, “猪”, “鼠”, “牛”, “虎”, “兔”, “龙”, “蛇”,

“马”, “羊”);
$index = $year%12;
$bornTag = $bornTagarray[$index];
return $bornTag;
}
echo birthday2BornTag(’1983-12-19′);

echo preg_replace("/([^s]+)*\1{2,}([^s]+)*/",'',$string);

$str = 'abccba 9872223s 12121212 ddd 1234560 vbwwc asasasasas zxzx qaz';
$source_array = explode(" ", $str);
foreach($source_array as $key=>$item){
    $current_str = str_split($item, 1);
    $current_array=array_count_values($current_str);    
    foreach ($current_array as $k => $it){
            if($it>=3)
                unset($source_array[$key]);
    }
}
var_dump($source_array);

<?php
$str = '蚂蚁蚂蚁学院学院，我非常爱爱爱爱爱你!522200011111333311111444';
function mbstringtoarray($str,$charset) {
  $strlen=mb_strlen($str);
  while($strlen){
    $array[]=mb_substr($str,0,1,$charset);
    $str=mb_substr($str,1,$strlen,$charset);
    $strlen=mb_strlen($str);
  }
  return $array;
}
$arr = mbstringtoarray($str,"gbk");  //分割字符串
$arr = array_unique($arr);           //过滤重复字符
$str = implode('', $arr);            //合并数组
echo $str;
?>

echo preg_replace('/([^s]+)/e','check("\1")',$string); 
function check($str) { 
       $tmp=count_chars($str,1); 
       sort($tmp); 
       return array_pop($tmp)>2?"":$str; 
 }

<?php
$path = "images";
if(!rmdir($path))
  {
  echo ("Could not remove $path");
  }
else
{
 echo '删除目录失败，因为images非空目录';
}
?>

<?php
// 说明： 删除非空目录的解决方案

function removeDir($dirName)
{
    if(! is_dir($dirName))
    {
        return false;
    }
    $handle = @opendir($dirName);
    while(($file = @readdir($handle)) !== false)
    {
        if($file != '.' && $file != '..')
        {
            $dir = $dirName . '/' . $file;
            is_dir($dir) ? removeDir($dir) : @unlink($dir);
        }
    }
    closedir($handle);
     
    return rmdir($dirName) ;
}
?>