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php自動采集如何實現 php采集京東商品詳情

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php自動采集如何實現 php采集京東商品詳情

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本篇文章給大家帶來的內容是關于php中常用的采集函數的總結（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的采集程序 ， 才發現用PHP采集內容是這么方便 ， 把經常用到的采集函數在這里總結一下 ， 方便以后使用!
獲取所有鏈接內容和地址
function getAllURL($code){
preg_match_all(‘/<as+href=http://www.mnbkw.com/jxjc/172223/[“|’]?([^>”‘ ]+)[“|’]?s*[^>]*>([^>]+)/i’,$code,$arr);
return array(‘name’=>$arr[2],’url’=>$arr[1]);
}
獲取所有的圖片地址
function getImgSrc($code){
$reg = “/]*src=http://www.mnbkw.com/jxjc/172223/”(http://(.+)/(.+).(jpg|gif|bmp|bnp|png))”/isU”;
preg_match_all($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 $nowurl;
}
把全角數字轉為半角數字
function getAlabNum($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])) {
$new_content = preg_replace(‘/href=http://www.mnbkw.com/jxjc/172223/”//’, ‘href=”‘.$protocol[0].$server_url.’/’, $content);
$new_content = preg_replace(‘/src=http://www.mnbkw.com/jxjc/172223/”//’, ‘src=”‘.$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);
//去掉空白字符
$table = preg_replace(“‘([rn])[s]+’”,””,$table);
$table = str_replace(” “,””,$table);
$table = str_replace(” “,””,$table);
$table = explode(“,{tr}”,$table);
array_pop($table);
return $table;
}
將HTML表格的每行每列轉為數組 ， 采集表格數據
function getTdArray($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單詞 $distinct=true 去除重復
function splitEnStr($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];
【php自動采集如何實現 php采集京東商品詳情】}