php采集安装教程_Python数据采集流程

php采集安装教程_Python数据采集流程 本篇文章给大家带来的内容是关于php中常用的采集函数的总结（附代码），有一定的参考价值，有需要的朋友可以参考一下，希望对你有所帮助。

这几天关注了一下PHP的采集程序，才发现用PHP采集内容是这么方便，把经常用到的采集函数在这里总结一下，方便以后使用!获取所有链接内容和地址function getAllURL($code){preg_match_all(‘/<as+href=[“|’]?([^>”‘ ]+)[“|’]?s*[^>]*>([^>]+)</a>/i’,$code,$arr);return array(‘name’=>$arr[2],’url’=>$arr[1]);}获取所有的图片地址function getImgSrc($code){$reg = “/]*src=”(http://(.+)/(.+).(jpg|gif|bmp|bnp|png))”/isU”;preg_match_all($reg, $code, $img_array, PREG_PATTERN_ORDER);return $img_array[1];}当前的脚本网址function getSelfURL(){if(!empty($_SERVER[“REQUEST_URI”])){$scriptName = $_SERVER[“REQUEST_URI”];$nowurl = $scriptName;}else{$scriptName = $_SERVER[“PHP_SELF”];if(empty($_SERVER[“QUERY_STRING”])) $nowurl = $scriptName;else $nowurl = $scriptName.”?”.$_SERVER[“QUERY_STRING”];}return $nowurl;}把全角数字转为半角数字function getAlabNum($fnum){$nums = array(“０”,”１”,”２”,”３”,”４”,”５”,”６”,”７”,”８”,”９”);$fnums = “0123456789”;for($i=0;$i<=9;$i++) $fnum = str_replace($nums[$i],$fnums[$i],$fnum);$fnum = ereg_replace(“[^0-9.]|^0{1,}”,””,$fnum);if($fnum==””) $fnum=0;return $fnum;}去除HTML标记function text2Html($txt){$txt = str_replace(” “,”　”,$txt);$txt = str_replace(“<“,”<“,$txt);$txt = str_replace(“>”,”>”,$txt);$txt = preg_replace(“/[rn]{1,}/isU”,”<br/>rn”,$txt);return $txt;}清除HTML标记function clearHtml($str){$str = str_replace(‘<‘,'<‘,$str);$str = str_replace(‘>’,’>’,$str);return $str;}相对路径转化成绝对路径function relative2Absolute($content, $feed_url) {preg_match(‘/(http|https|ftp):///’, $feed_url, $protocol);$server_url = preg_replace(“/(http|https|ftp|news):///”, “”, $feed_url);$server_url = preg_replace(“//.*/”, “”, $server_url);if ($server_url == ”) {return $content;}if (isset($protocol[0])) {$new_content = preg_replace(‘/href=”//’, ‘href=”‘.$protocol[0].$server_url.’/’, $content);$new_content = preg_replace(‘/src=”//’, ‘src=”‘.$protocol[0].$server_url.’/’, $new_content);} else {$new_content = $content;}return $new_content;}获取指定标记中的内容function getTagData($str, $start, $end){if ( $start == ” || $end == ” ){return;}$str = explode($start, $str);$str = explode($end, $str[1]);return $str[0];}HTML表格的每行转为CSV格式数组function getTrArray($table) {$table = preg_replace(“‘<td[^>]*?>’si”,'”‘,$table);$table = str_replace(“</td>”,'”,’,$table);$table = str_replace(“</tr>”,”{tr}”,$table);//去掉 HTML 标记$table = preg_replace(“‘<[/!]*?[^<>]*?>’si”,””,$table);//去掉空白字符$table = preg_replace(“‘([rn])[s]+'”,””,$table);$table = str_replace(” “,””,$table);$table = str_replace(” “,””,$table);$table = explode(“,{tr}”,$table);array_pop($table);return $table;}将HTML表格的每行每列转为数组，采集表格数据function getTdArray($table) {$table = preg_replace(“‘<table[^>]*?>’si”,””,$table);$table = preg_replace(“‘<tr[^>]*?>’si”,””,$table);$table = preg_replace(“‘<td[^>]*?>’si”,””,$table);$table = str_replace(“</tr>”,”{tr}”,$table);$table = str_replace(“</td>”,”{td}”,$table);//去掉 HTML 标记$table = preg_replace(“‘<[/!]*?[^<>]*?>’si”,””,$table);//去掉空白字符$table = preg_replace(“‘([rn])[s]+'”,””,$table);$table = str_replace(” “,””,$table);$table = str_replace(” “,””,$table);$table = explode(‘{tr}’, $table);array_pop($table);foreach ($table as $key=>$tr) {$td = explode(‘{td}’, $tr);array_pop($td);$td_array[] = $td;}return $td_array;}返回字符串中的所有单词 $distinct=true 去除重复function splitEnStr($str,$distinct=true) {preg_match_all(‘/([a-zA-Z]+)/’,$str,$match);if ($distinct == true) {$match[1] = array_unique($match[1]);}sort($match[1]);return $match[1];}