php一些实用的自制方法

时间戳转多久之前

function mdate($time = NULL) {
    $text = '';
    $time = $time === NULL || $time > time() ? time() : intval($time);
    $t = time() - $time; //时间差 （秒）
    $y = date('Y', $time)-date('Y', time());//是否跨年
    switch($t){
     case $t == 0:
       $text = '刚刚';
       break;
     case $t < 60:
      $text = $t . '秒前'; // 一分钟内
      break;
     case $t < 60 * 60:
      $text = floor($t / 60) . '分钟前'; //一小时内
      break;
     case $t < 60 * 60 * 24:
      $text = floor($t / (60 * 60)) . '小时前'; // 一天内
      break;
     case $t < 60 * 60 * 24 * 3:
      $text = floor($time/(60*60*24)) ==1 ?'昨天 ' . date('H:i', $time) : '前天 ' . date('H:i', $time) ; //昨天和前天
      break;
     case $t < 60 * 60 * 24 * 30:
      $text = date('m月d日 H:i', $time); //一个月内
      break;
     case $t < 60 * 60 * 24 * 365&&$y==0:
      $text = date('m月d日', $time); //一年内
      break;
     default:
      $text = date('Y年m月d日', $time); //一年以前
      break;
    }
        
    return $text;
}

//json乱码转中文

function decodeUnicode($str){
  return preg_replace_callback('/\\u([0-9a-f]{4})/i',
    create_function(
      '$matches',
      'return mb_convert_encoding(pack("H*", $matches[1]), "UTF-8", "UCS-2BE");'
    ),
    $str);
}

//时间戳转日期
function MyDate($time){
    return date("Y-m-d H:i:s",$time);
}

//获取真实ip
function getClientIP(){  
    global $ip;  
    if(getenv("HTTP_CLIENT_IP")){
        $ip = getenv("HTTP_CLIENT_IP");  
    }else if(getenv("HTTP_X_FORWARDED_FOR")){
        $ip = getenv("HTTP_X_FORWARDED_FOR");  
    }else if(getenv("REMOTE_ADDR")){
        $ip = getenv("REMOTE_ADDR");  
    }else{
        $ip = "NULL";  
    }
    return $ip;  
}

curl爬虫

function _grab($curl,$postInfo='',$cookie='',$referer='',$userAgent=''){
     $ch = curl_init();  
     curl_setopt($ch, CURLOPT_URL, $curl);  
     //不输出头
     curl_setopt($ch, CURLOPT_HEADER, 0);   
     //以字符串返回获取的信息，不直接输出
     curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
     //如果是https链接，不验证证书
     if(preg_match('/https/i', $curl)){
         curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
     }
     //POST
     if($postInfo){
        curl_setopt($ch,CURLOPT_POST,1);
        curl_setopt($ch,CURLOPT_POSTFIELDS,$postInfo);
     }
     //加入cookie
     if($cookie){
         curl_setopt($ch,CURLOPT_COOKIE,$cookie);
     }
     //模拟来路
     if($referer){
         curl_setopt($ch, CURLOPT_REFERER, $referer);
     }
     //模拟环境
     if($userAgent){
         curl_setopt($ch, CURLOPT_USERAGENT, $userAgent);
     }
     //执行
     $content = curl_exec($ch);  
     //错误处理
     if ($content  === false) {  
       return "网络请求出错: " . curl_error($ch);  
       exit();  
     }  
　　  curl_close($ch);
     return $content;
}

   //输入二维数组，输出二维数组的全部可能，用于生成sku
    //$data = ['颜色'=>['红','黄','蓝'],'内存'=>['4G','8G']];
    //得到：Array ( [0] => Array ( [颜色] => 红 [内存] => 4G ) [1] => Array ( [颜色] => 红 [内存] => 8G ) [2] => Array ( [颜色] => 黄 [内存] => 4G ) [3] => Array ( [颜色] => 黄 [内存] => 8G ) [4] => Array ( [颜色] => 蓝 [内存] => 4G ) [5] => Array ( [颜色] => 蓝 [内存] => 8G ) )
    public function getSkus($data){
 /*       $data = ['颜色'=>['红','黄','蓝'],'内存'=>['4G','8G']];*/
        //用来装key
        $index = [];
        foreach ($data as $key => $value) {
            //key的集合
            $index[] = $key;
        }   
        
        //data数组元素的个数
        $count = count($index);
        //newData 用于装结果
        $newData = [];

        //第一种可能
        if($count==1){
            //此时   $index[0]就是$data的第一个key
            $data_1 = $data[$index[0]];    
            //如果只有一位，for循环只有一层
            for($x = 0;$x<count($data_1);$x++){
                //$index[0]是索引
                $newData[] = [$index[0]=>$data_1[$x]];
            }    
        }

        elseif($count==2){
            $data_1 = $data[$index[0]];    
            $data_2 = $data[$index[1]];    
            for($x = 0; $x<count($data_1);$x++){
                for($y = 0; $y <count($data_2); $y++){
                    //index[0] , 和 ,$index[1]分别是索引
                    $newData[] = [$index[0] => $data_1[$x],$index[1] => $data_2[$y]];
                }
            }
        }

        elseif($count==3){
            $data_1 = $data[$index[0]];    
            $data_2 = $data[$index[1]];
            $data_3 = $data[$index[2]];        
            for($x = 0; $x<count($data_1);$x++){
                for($y = 0; $y <count($data_2); $y++){
                    for($z = 0; $z <count($data_3) ; $z++){
                        //index[0] , 和 ,$index[1] ,$index[2]  分别是索引
                        $newData[] = [$index[0] => $data_1[$x],$index[1] => $data_2[$y],$index[2] => $data_3[$z]];
                    }                
                }
            }
        }

        elseif($count==4){
            $data_1 = $data[$index[0]];    
            $data_2 = $data[$index[1]];
            $data_3 = $data[$index[2]];    
            $data_4 = $data[$index[3]];        
            for($x = 0; $x<count($data_1);$x++){
                for($y = 0; $y <count($data_2); $y++){
                    for($z = 0; $z <count($data_3) ; $z++){
                        for($a = 0; $a <count($data_4) ; $a++){
                             //index[0] , 和 ,$index[1] ,$index[2]  分别是索引
                            $newData[] = [$index[0] => $data_1[$x],$index[1] => $data_2[$y],$index[2] => $data_3[$z],$index[3] => $data_4[$a]];                           
                        }
                    }                
                }
            }
        }

        else{
            return false;
        }
        return $newData; 
    }

//写入日志date('m_d')
function my_log($data){
   $log_file = date('m_txt__d__',time()).'.txt';
  /* $content =var_export($data,TRUE);*/
   $data .= "
";
   file_put_contents($log_file,$data, FILE_APPEND);
}

//从txt一行一行读取成数组
function readKeyword(){

    $data = [];
    $f= fopen("danci.txt","r");
    $count = 0;
    while (!feof($f))
    {
      $line = fgets($f);
      $line = substr($line, 0,6);
      $data[] = $line;
    }
    fclose($f);
    return $data;
}

编码

header("Content-Type:text/html;charset=utf-8");

//时区
date_default_timezone_set("PRC");


ignore_user_abort(); //关掉浏览器，PHP脚本也可以继续执行.
set_time_limit(0); // 通过set_time_limit(0)可以让程序无限制的执行下去


ob_flush(); //输出缓冲
flush(); 

     //网络图片转换本地图片
    function jpgChangeLocal($pic){

        //获取文件
        $file = _request($pic);     
        $end = rand(1000,9999).'_'.time().'.jpg';
        $dir_path = 'd:/image';
        if(!is_dir($dir_path)){
            mkdir($dir_path);
        }

        $filename = $dir_path.'/'.$end;
        //打开写入流
        $resource = fopen($filename, 'a');
        //写入
        fwrite($resource, $file);
        //关闭资源
        fclose($resource);
    
        return '@'.dirname(__FILE__).'/'.$filename;
    }