Python數據採集流程：php採集安裝教程

本篇文章給大家帶來的內容是關於php中常用的採集函數的總結（附代碼），有一定的參考價值，有需要的朋友可以參考一下，希望對你有所幫助。

這幾天關注了一下PHP的採集程序，才發現用PHP採集內容是這麼方便，把經常用到的採集函數在這裡總結一下，方便以後使用!

獲取所有鏈接內容和地址

function getAllURL($code){

preg_match_all(‘/<as+href=[“|’]?([^>”‘ ]+)[“|’]?s*[^>]*>([^>]+)</a>/i’,$code,$arr);

return array(‘name’=>$arr[2],’url’=>$arr[1]);

}

獲取所有的圖片地址

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];

}

當前的腳本網址

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;

}

把全形數字轉為半形數字

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標記

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標記

function clearHtml($str){

$str = str_replace(‘<‘,'<‘,$str);

$str = str_replace(‘>’,’>’,$str);

return $str;

}

相對路徑轉化成絕對路徑

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;

}

獲取指定標記中的內容

function getTagData($str, $start, $end){

if ( $start == ” || $end == ” ){

return;

}

$str = explode($start, $str);

$str = explode($end, $str[1]);

return $str[0];

}

HTML表格的每行轉為CSV格式數組

function getTrArray($table) {

$table = preg_replace(“‘<td[^>]*?>’si”,'”‘,$table);

$table = str_replace(“</td>”,'”,’,$table);

$table = str_replace(“</tr>”,”{tr}”,$table);

//去掉 HTML 標記

$table = preg_replace(“‘<[/!]*?[^<>]*?>’si”,””,$table);

//去掉空白字元

$table = preg_replace(“‘([rn])[s]+'”,””,$table);

$table = str_replace(” “,””,$table);

$table = str_replace(” “,””,$table);

$table = explode(“,{tr}”,$table);

array_pop($table);

return $table;

}

將HTML表格的每行每列轉為數組，採集表格數據

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 標記

$table = preg_replace(“‘<[/!]*?[^<>]*?>’si”,””,$table);

//去掉空白字元

$table = preg_replace(“‘([rn])[s]+'”,””,$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;

}

返回字元串中的所有單詞 $distinct=true 去除重複

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];

}