php一些实用的自制方法

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);
}

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();  
     }  
     return $content;
}