php中常用的採集函數的總結（附代碼）

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，希望對你有所協助。

這幾天關注了一下PHP的採集程式，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!

擷取所有連結內容和地址

function getAllURL($code){preg_match_all('/<a\s+href=["|\']?([^>"\' ]+)["|\']?\s*[^>]*>([^>]+)<\/a>/i',$code,$arr);return array('name'=>$arr[2],'url'=>$arr[1]);}

擷取所有的圖片地址

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];}

當前的指令碼網址

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("/[\r\n]{1,}/isU","<br/>\r\n",$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;}

擷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}",$table);//去掉 HTML 標籤$table = preg_replace("'<[\/\!]*?[^<>]*?>'si","",$table);//去掉空白字元$table = preg_replace("'([\r\n])[\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，採集表格式資料

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}",$table);//去掉 HTML 標籤$table = preg_replace("'<[\/\!]*?[^<>]*?>'si","",$table);//去掉空白字元$table = preg_replace("'([\r\n])[\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];}