<?php

/**
 * 随机链接
 */
function randUrl()
{
    //扫描文件夹
    $file = @scandir('./spider');
    $random = [];
    if($file)
    {
        
        unset($file[0]);
        unset($file[1]);
        $file = array_merge($file);
        $rand = rand(0, sizeof($file)-1);
        //随机获取文件当下的链接
        $files = @file_get_contents('./spider/'.$file[$rand]);
        if($files)
        {
            $titleList = @explode("\n",$files);
           
            $titleRand = rand(0, sizeof($titleList)-1);
            
            $random = $titleList[$titleRand];
           
        }
    }
    //$count = $number ? round(0,$number) : 0 ;
    if(strstr($random, '数字'))
    {
        $number = findNum(strstr($random, '数字'));
        $arr = implode( ',', str_split( $number ));
        $number = explode(',',$arr);
        $coun = count($number);
        
         $random = str_replace("{",'',$random);
         $random = str_replace("}",'',$random);
        //  echo $random;die;
        
      for($i=0;$i<$coun;$i++){
        
        //   $random = str_replace("{随机数字".$number[$i]."}",rand(pow(10,$number[$i]-1),pow(10,$number[$i])-1),$random);
         $sui = "{随机数字".$number[$i]."}";
         $random = preg_replace($sui,rand(pow(10,$number[$i]-1),pow(10,$number[$i])-1),$random,1);
           
        
      }
   
    }
    
    
    
    // if(strstr($random, '字符'))
    // {
    //     $number = findNum(strstr($random, '字符'));
    //     $random = str_replace("{随机字符".$number."}",GetRandStr($number,'span'),$random);
    // }
     if(strstr($random, '字符'))
    {  
        $number = findNum(strstr($random, '字符'));
        $arr = implode( ',', str_split( $number ));
        $number = explode(',',$arr);
        $coun = count($number);
        
         $random = str_replace("{",'',$random);
         $random = str_replace("}",'',$random);
         for($i=0;$i<$coun;$i++){
        
        //   $random = str_replace("{随机数字".$number[$i]."}",rand(pow(10,$number[$i]-1),pow(10,$number[$i])-1),$random);
         $sui = "{随机字符".$number[$i]."}";
         $random = preg_replace($sui,GetRandStr($number[$i],'span'),$random,1);
           
        
      }
    //   var_dump($random);die;
        // $random = str_replace("{随机字符".$number."}",GetRandStr($number,'span'),$random);
    }
    if(strstr($random, '{年月}'))
    $random = str_replace("{年月}",date("Ym"),$random);
    
    if(strstr($random, '{年月日}'))
    $random = str_replace("{年月日}",date("Ymd"),$random);
    
    if(strstr($random, '{年}'))
    $random = str_replace("{年}",date("Y"),$random);
    
    if(strstr($random, '{月}'))
    $random = str_replace("{月}",date("m"),$random);
    
    if(strstr($random, '{日}'))
    $random = str_replace("{日}",date("d"),$random);
    
    return $random;
}

/**
 * 提取数字
 */
function findNum($str=''){
    $str=trim($str);
    if(empty($str)){return '';}
    $result='';
    for($i=0;$i<strlen($str);$i++){
        if(is_numeric($str[$i])){
            $result.=$str[$i];
        }
    }
    return $result;
}

/**
 * 随机字符
 */
function GetRandStr($length,$type='count'){
 
 //字符组合
 if($type == 'count')
 $str = '0123456789';
 else
 $str = 'abcdefghijklmnopqrstuvwxyz';
 $len = strlen($str)-1;
 $randstr = '';
 for ($i=0;$i<$length;$i++) {
  $num=mt_rand(0,$len);
  $randstr .= $str[$num];
 }
 return $randstr;
}