PHP a data collection class example code-PHP Tutorial-php.cn

Data acquisition, also known as data acquisition, is an interface that uses a device to collect data from outside the system and input it into the system. Data collection technology is widely used in various fields. For example, cameras and microphones are all data collection tools.

The collected data are various physical quantities that have been converted into electrical signals, such as temperature, water level, wind speed, pressure, etc. They can be analog quantities or digital quantities. The collection is generally a sampling method, that is, the same point data is collected repeatedly at certain intervals (called the sampling period). Most of the data collected are instantaneous values, or they can be a characteristic value within a certain period of time. Accurate data measurement is the basis of data collection. Data measurement methods include contact and non-contact, and there are various detection components. No matter which method or component is used, the premise is not to affect the state of the measured object and the measurement environment to ensure the accuracy of the data. Data collection has a broad meaning, including the collection of surface-like continuous physical quantities. In computer-aided drafting, surveying, and design, the process of digitizing graphics or images can also be called data collection. At this time, what is collected is geometric quantity (or physical quantity, such as grayscale) data.

Today, with the rapid development of the Internet industry, data collection has been widely used in the Internet and distributed fields, and important changes have taken place in the field of data collection. First of all, intelligent data acquisition systems in distributed control applications have made great progress at home and abroad. Second, the number of bus-compatible data acquisition plug-ins continues to increase, as does the number of personal computer-compatible data acquisition systems. Various data collection machines at home and abroad have come out one after another, bringing data collection into a new era.

The following is a data collection class

seturl($url); $ugs->gather(); //............这里可以调用本类里的其它方法，对$ugs->value_ 做调整, 以满足您的要求 $content=$ugs->getcontent(); print($content); ?> */ class ugs { var $value_ ; //'目标内容 var $src_ ; //'目标URL地址 function seturl($url) { $this->src_=$url; } function getcontent() { return $this->value_; } function getfile($url) // 获取目标 { $url_parsed = parse_url($url); $host = $url_parsed["host"]; $port = $url_parsed["port"]; if ($port==0) $port = 80; $path = $url_parsed["path"]; if (empty($path)) $path="/"; if ($url_parsed["query"] != "") $path .= "?".$url_parsed["query"]; $out = "GET $path HTTP/1.0\r\nHost: $host\r\n\r\n"; $fp = fsockopen($host, $port, $errno, $errstr, 30); fwrite($fp, $out); $body = false; while (!feof($fp)) { $s = fgets($fp, 1024); if ( $body ) $in .= $s; if ( $s == "\r\n" ) $body = true; } fclose($fp); return $in; } function getfile_curl($url) { $curl="/usr/local/bin/curl " ; // path to your curl $curl_options=" -s --connect-timeout 10 --max-time 10 "; // curl 用法请参考 curl --help 或者 man curl // curl 参数非常之丰富,可以模拟各种浏览器(agent) 可以设置referer $cmd="$curl $curl_options $url "; @exec($cmd,$o,$r); if($r!=0) { return "超时"; } else { $o=join("",$o); return $o; } } function gather_curl($curl) { $http=$this->getfile_curl($this->src_); return $this->value_=$http; } function gather_array($url) { return file($url); } function gather() // 开始收集 { $http=$this->getfile($this->src_); return $this->value_=$http; } function gather_local($toline=true) // 处理本地文件 { if($toline) { $http=file($this->src_); return $this->value_=$this->BytesToBstr($http); } else { $http=file($this->src_); return $this->value_=$http; } } function noReturn() // 删除回车换行 { $this->value_=str_replace("\n","",$this->value_); $this->value_=str_replace("\r","",$this->value_); } function change($oldStr,$str) //'对收集到的内容中的个别字符串用新值更换/方法 //'参数分别是旧字符串,新字符串 { $this->value_=str_replace($oldStr,$str,$this->value_ ); } function cut($start,$end,$no='1',$comprise='') //'按指定首尾字符串对收集的内容进行裁减（不包括首尾字符串）方法 // $no 必须是 1,2 3 ... 不允许是0 //$comprise 可以选择 start 或者 end 或者 all 或者 什么都不填 { $string=explode($start,$this->value_); //print_r($string); $string=explode($end,$string[$no]); //print_r($string); switch ($comprise){ case 'start': $string=$start.$string[0]; break; case 'end': $string=$string[0].$end; break; case 'all': $string=$start.$string[0].$end; break; default: $string=$string[0]; } return $this->value_=$string; } function filt($head,$bot,$str,$no='1',$comprise='') //'按指定首尾字符串对收集的内容用新值进行替换（不包括首尾字符串）方法 // '参数分别是首字符串,尾字符串,新值,新值位空则为过滤 { $tmp_v=$this->value_; $tmp=$this->cut($head,$bot,$no,$comprise); return $this->value_=str_replace($tmp,$str,$tmp_v); } function local() { //'将收集的内容中的绝对URL地址改为本地相对地址 // 还没实现 } function replaceByReg($patrn,$str) //'对收集的内容中的符合正则表达式的字符串用新值进行替换/方法 //'参数是你自定义的正则表达式,新值 { return $this->value_=join("",preg_replace($patrn,$str,$this->value_)); } function debug() //调试显示 { $tempstr="".$this->value_."

   "; echo $tempstr; } } ?>

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