php采摘程序中常用的函数

php采集程序中常用的函数

php采集程序中常用的函数

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//获得当前的脚本网址function get_php_url(){        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);        $txt = preg_replace("/[\r\n]{1,}/isU","<br/>\r\n",$txt);        return $txt;}//清除HTML标记function ClearHtml($str){        $str = str_replace('<','<',$str);        $str = str_replace('>','>',$str);        return $str;}//相对路径转化成绝对路径function relative_to_absolute($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 $new_content;}//取得所有链接function get_all_url($code){        preg_match_all('/<a\s+href=["|\']?([^>"\' ]+)["|\']?\s*[^>]*>([^>]+)<\/a>/i',$code,$arr);        return array('name'=>$arr[2],'url'=>$arr[1]);}//获取指定标记中的内容function get_tag_data($str, $start, $end){        if ( $start == '' || $end == '' ){               return;        }        $str = explode($start, $str);        $str = explode($end, $str[1]);        return $str[0];}//HTML表格的每行转为CSV格式数组function get_tr_array($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         $table = preg_replace("'([\r\n])[\s]+'","",$table);        $table = str_replace(" ","",$table);        $table = str_replace(" ","",$table);        $table = explode(",{tr}",$table);        array_pop($table);        return $table;}//将HTML表格的每行每列转为数组，采集表格数据function get_td_array($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         $table = preg_replace("'([\r\n])[\s]+'","",$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;}//返回字符串中的所有单词 $distinct=true 去除重复function split_en_str($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];}